Solubility of wood-cellulose in LiCl/DMAC solvent system

A LiCl/DMAC solvent system was used to dissolve wood-cellulose with aims to broaden its application in preparing func-tional materials of modified wood-cellulose. We studied the dissolubility complexion of wood-cellulose in a LiCl/DMAC solvent system, made sure of the important function of LiCl in a cellulose solvent, and further confirmed its dissolution mechanism via the measurement of infrared spectra of soluble products. The study results are as follows: first, LiCl salts, which can form intermediate complexes with cellulose, have played an important role in the LiCl/DMAC solvent system, and their solubility performance is en-hanced by reducing the hydrogen bond effect between cellulose molecules; second, the non-aqueous solvent system is a better method for dissolving wood-cellulose in homogenous phase. As found in infrared spectra, the absorption intensity of hydroxyl groups (broad peaks: 3,400 cm-1) decreased greatly in cellulose macromolecules. This is because the degree of association between the hy-droxyl groups of cellulose macromolecules is reduced, due to the destruction of the hydrogen bonds. Lastly, wood-cellulose can be dissolved in a LiCl/DMAC solvent thoroughly and efficiently, and can provide a better solvent system for homogeneous synthesis in the preparation of new functional materials via modified wood-cellulose.     

Solubility of wood-cellulose in LiCl/DMAC solvent system

A LiC1/DMAC solvent system was used to dissolve wood-cellulose with aims to broaden its application in preparing functional materials of modified wood-cellulose. We studied the dissolubility complexion of wood-cellulose in a LiC1/DMAC solvent system, made sure of the important function of LiC1 in a cellulose solvent, and further confirmed its dissolution mechanism via the measurement of infrared spectra of soluble products. The study results are as follows： first, LiC1 salts, which can form intermediate complexes with cellulose, have played an important role in the LiC1/DMAC solvent system, and their solubility performance is en- hanced by reducing the hydrogen bond effect between cellulose molecules; second, the non-aqueous solvent system is a better method for dissolving wood-cellulose in homogenous phase. As found in infrared spectra, the absorption intensity of hydroxyl groups （broad peaks： 3,400 cm^-1） decreased greatly in cellulose macromolecules. This is because the degree of association between the hydroxyl groups of cellulose macromolecules is reduced, due to the destruction of the hydrogen bonds. Lastly, wood-cellulose can be dissolved in a LiC1/DMAC solvent thoroughly and efficiently, and can provide a better solvent system for homogeneous synthesis in the preparation of new functional materials via modified wood-cellulose.     

Application Progress of Nano-cellulose in Paper-based Functional Materials北大核心CSCD

The classification and properties of nano-cellulose were introduced. The nano-cellulose was divided into nano-cellulose crystal(NCC), microfibrillated cellulose(MFC) and bacterial nano-cellulose(BNC). NCC has a rod-like whisker structure with high crystallinity and high mechanical properties. MFC is filamentous, with wide size range and larger aspect ratio, large specific surface area and strong hydrogen bonding ability. BNC has ultrafine network structure with high degree of chemical purity and polymerization, and strong water retention ability. The application status of nano-cellulose in paper-based reinforced materials, paper-based antimicrobial materials, paper-based filter materials, paper-based conductive materials, paper-based luminescent materials, paper-based insulating materials, paper-based hydrophobic materials and paper-based sensor materials was reviewed. The future development of nano-cellulose in paper-based functional materials was also prospected. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Physicochemical Property,Evaluation and Screening of Seed Oil from 88 Species of Non-food Biodiesel Plants in Xiangxi Region北大核心CSCD

The physical and chemical properties of seed oil from 88 non-food biodiesel plants species with the oil content >30% in Xiangxi region were analyzed, evaluated and screened by measurement of acid value, iodine value, saponification value and the components of fatty acids. The results showed that within the 88 species, the acid value, iodine value, saponification value and linolenic acid in the oil ranged from 0.63-202.35 mg/g, 1.85%-288.26%, 70.72-576.16 mg/g and 0.02%-63.93 %, respectively. According to the evaluation standard in Xiangxi region, 14 species of 88 non-food biodiesel plants species were preliminarily screened. Based on the analytic hierarchy process (AHP) from 8 evaluation indexes, belonging to three classes, i.e., the specie natural property, seed oil physicochemical property and the oil composition content, these 11 non-grain biodiesel plants were evaluated and ranked as Lindera reflexa>Glochidion puberum>Carya hunanensis>Arctium lappa>Chimonanthus praecox>Sloanea sinensis>Corylus chinensis>Decaisnea insignis>Symplocos paniculata>Camellia cuspidata>Koelreuteria bipinnata. Combing the biological traits of these species, it was proposed that L. reflexa,C. hunanensis,A. lappa,C. praecox and S. paniculata were suitable for the biodiesel development in Xiangxi region, among which four species (L. reflexa and C. hunanensis) showed the largest potentiality. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Catalytic Liquefaction of Spartina alterniflora in Ethanol-water Co-solvent for Bio-oil北大核心CSCD

In the paper invading plants Spartina alterniflora Lois. (S. alterniflora) was chosen as raw materials and catalytic liquefied (CL) in ethanol-water with the participation of the readily available alkaline catalyst KOH. The effects of different process conditions on the bio-oil yield and residue yield of S. alterniflora were investigated. Additionally, to investigate the effect of the action of KOH on bio-oil yield, residue yield and the composition of bio-oil, direct liquefaction (DL) was carried out with the same reaction parameters as comparison. The results showed that the conditions of liquefaction reaction of S. alterniflora could be alleviated with the cation of catalyst KOH and the maximum bio-oil yield (52.30%) as well as fractional conversion (90.17%) were observed at the optimal conditions of 320 ℃, ethanol volume fraction 75%, ratio of liquid to material 10:1 (mL:g) and reaction time 60 min. SEM micrographs of solid residue indicated that volatiles were vented during initial stages of depolymerisation of S. alterniflora with the participation of KOH. GC-MS analysis and FT-IR analysis of bio-oil indicated that the composition of main ingredients of bio-oil was not significantly changed by the action of KOH but the mass fraction was impacted to a certain degree. Phenolic compounds of bio-oil increased significantly from 29.88% to 40.98% and ester compounds reduced evidently of which the mass fraction was 10.40%. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Synthesis and Antibacterial Activity of Derivatives of Rhein北大核心CSCD

Based on carboxyl amidation of rhein(1), a series of derivatives of rhein were synthesized by structure modification of C7 of anthraquinone mother nucleus. And the antibacterial activity and structure-activity relationship of the derivatives were preliminary discussed. The derivatives of rhein were respectively rhein piperidine amide(2), 7-hydroxymethyl-rhein piperidine amide(3), 7-bromomethyl-rhein piperidine amide(4), 7-(4-morpholino)methyl-rhein piperidine amide(5a), 7-(pyrrolidin-1-yl)methyl-rhein piperidine amide(5b), 7-(1-methyl-4-piperazinyl)methyl-rhein piperidine amide(5c). The structures of the compounds were characterized by IR, 1H NMR, 13C NMR, MS. The minimal inhibitory concentrations (MIC) of the compounds obtained were tested and the MIC of compounds 5a and 5b against E.coli reached 0.78 and 0.39 mg/L respectively. Their antibacterial activity were stronger than that of rhein(MIC 3.13 mg/L) obviously, even stronger than that of the kanamycin(MIC 1.56 mg/L); and the MIC of compound 5a against S. aureus reached 1.56 mg/L, which was similar to that of rhein. The preliminary analysis of structure effective relationship showed that if none replace heterocyclic groups were introduced into substituent of C7 of the mother nucleus, the antibaterial activity on E.coli would be stronger. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Depolymerization of Lignin Catalyzed by Complex Metal Oxide in Supercritical Methanol北大核心CSCD

Cu-Ni doped layered double oxide (LDO) catalysts were prepared from hydrotalcite-like precursors. The effects of reaction conditions on the catalytic lignin depolymerization productswere investigated in supercritical methanol. The results showed that in the condition of n(Cu):n(Ni)=1:1, at 280 ℃ for 8 h,Cu0.5Ni0.5Mg3Al-LDO used as catalyst with 30% dosage, the monomer yield from lignin depolymerization was up to 67.5%, while the yields of tetrahydrofuran(THF) insoluble residue and charwere least. The liquid phase product were qualitatively and quantitatively analyzed by GC-MS, and it was observed that the yield of the cyclic compound was 64.43%, and the acyclic product was only 10.65%, indicating Cu/Ni-LDO catalyst can effectively break the bonds between the lignin structural units, while with a lowactivity to break the aromatic ring structure.Charforming reactions in lignin depolymerization were effectively suppressed by Cu/Ni co-doped LDO catalyst, and the monomer yield was significantly improved. Hydrogenolysis and hydrogenation reaction in lignin depolymerization were promoted obviously at higher temperature,leading to a higher monomer yield. The supercritical temperature of methanol showed a significant effect on the depolymerization of lignin: When the reaction temperature was higher than 240 ℃, the yield of monomer increased significantly and the yields of insoluble residue and char decreasedon the other hand. The degradation rate of lignin remained above 90% after the catalyst was recycled for three times. XRD, ICP and N2 adsorption and desorption experiments showed that leaching of Mg was the main cause for catalyst deactivation. Cu/Ni-LDO catalyst can effectively promote the depolymerization of lignin into small molecule monomer compounds in supercritical methanol medium. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Preparation of 1,8-p-Menthane Diacetamide from p-Menthadienes北大核心CSCD

Using p-menthadienes and acetonitrile as raw materials, 1,8-p-menthane diacetamide was prepared in sulfuric acid solution via Ritter reaction. The effects of the mass fraction of sulfuric acid solution, the molar ratio of p-menthadienes to sulfuric acid solution and acetonitrile, reaction temperature, reaction time and the type of p-menthadienes on the yield of 1,8-p-menthane diacetamide were optimized. The results showed that when c(H2SO4)=60%, n(H2SO4):n(p-menthadienes)= 2.2:1, n(acetonitrile):n(p-menthadienes)=2.4:1, T= 55 ℃, t=6 h, the yield of 1,8-p-methane diacetamide is the highest. Among different pure component compounds in p-menthadienes, limonene is the most efficient starting material and got the highest yiled of 61.6%. The structure of the product was identified and characterized by FI-IR,ESI+-MS and 1H NMR. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Regulating Effect of P-factor on Lignin Mass Concentration in Prehydrolysis Liquor of Triploid Poplar北大核心CSCD

In order to regulate the lignin mass concentration in prehydrolysis liquor, the mass concentrations of Klason lignin and acid-soluble lignin in the prehydrolysis liquor of triploid poplar were studied at different P-factor. The results showed that there was a regulating effect of P-factor on lignin mass concentration in poplar prehydrolysis liquor. The increasing processes of the mass concentration of two kinds of lignins were both divided into a fast phase (P-factor <1 200) and a following slow phase (P-factor >1 200). The mass concentration ratio of Klason lignin to acid-soluble lignin(r) was revealed at (0.50±0.03). The prehydrolysis lignin in the form of lignin-carbohydrate complex was found at P-factor <306. Klason lignin fragmentation and pseudo lignin formation were obviously indicated at P-factor>691. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Thermal Decomposition Characteristics and Kinetics of Tea Stalk北大核心CSCD

In order to provide comprehensive utilization of tea stalk waste by thermochemical conversion, the thermal decomposition process of tea stalk and its kinetics were studied with simultaneous measurements of thermogravimetry (TG)/differential thermal analysis (DTA). The TG-DTG-DTA curves of tea stalk were acquired in a nitrogen atmosphere. The results indicated that the mass loss process of the samples could be divided into five stages. Among the five stages, most of the decomposition occurred in the third and fourth stages. The two main stages were indicated as exothermic processes, with the average weight loss rates of 55.12% and 28.48% at different heating rates of 10, 15, 20, 25 K/min, respectively. At higher heating rate, the fourth stage of the decomposition reaction was shifted to higher temperature range. The thermal decomposition kinetic parameters were calculated by Kissinger, FWO peak maximum evolution and FWO isoconversional methods. The results showed that the Kissinger and FWO peak maximum evolution methods were more suitable for the thermal decomposition kinetic parameters. The apparent activation energies were calculated to be 666.53 and 642.80 kJ/mol by the two methods, respectively. And natural logarithm of the pre-exponential factor (lnA) calculated by Kissinger method was given as 145.83. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Ultrasonic-assisted Radical Process for Directed Degradation of Arabinogalactan北大核心CSCD

Arabinogalactan (AG) was extracted from the sawdust of larch (Larix gmelinii(Rupr.) Kuzen). The arabinogalactan obtained was physically degraded by ultrasound-assisted free radicals. The free radical scavenging ability of decomposed AG was selected as an indicator on the evaluation of the antioxidant activity. On the basis of single-factor test, response surface optimization was used to determine the optimal degradation conditions, and the optimum conditions are found as follows: the dpolysaccharide concentration was 10 g/L; ultrasonic temperature was 60℃; the H2O2 volume fraction was 6%; and the ultrasonic time was 60 min. Under this optimum degradation condition, the ·OH scavenging rate of arabinogalactan was 89.6%, and Mr of AG was degraded from 52 ku to around 25 ku, and the cumulative weight fraction of this molecular weight reached 60%.Compared with AG, the antioxidant activity of arabinogalactan oligosaccharide(AG-O) obtained in the anti-oxidative activity was significantly enhanced, and its IC50 value decreased from 2.058 g/L to 0.497g/L. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Promotion of in situ enzymatic degradation on natural plant fiber by ionic liquid北大核心CSCD

An ionic liquid, i.e., 1-ethyl-3-methylimidazolium ([EMIM]OAc), was used to treat two natural plant fiber (Salix psammophila and cotton). The effects of this pretreatment on the enzymatic degradation of these two materials were investigated in present study. The optimum condition for degradation was obtained as 3.64 mL pH 5 citric acid-sodium citrate buffer solution was added to 5g 4% natural plant fiber[EMIM]OAc solution. A reaction system with 55 g/L fiber substrate was obtained. The optimal ratio of enzyme to substrate was 0.5 ∶1(mL ∶g), and the optimal reaction temperature and reaction time were 55℃ and 25 h, respectively. Under the optimal condition, the enzymatic degradation of the two natural plant fiber was beyond 90%. The FT-IR showed that the hydrogen bondings of fiber were broken by [EMIM]OAc in the process of dissolution. It resulted in a fiber material with more amorphous pattern. These changes would increase the accessibility between fiber and cellulase. This led to more enzymatic degradation of cellulose.     

Effects of Inorganic Elements Spray on the Content of Polyphenols in Eucommia ulmoides Olive Leaves北大核心CSCD

The effect of three kinds of microelement fertilizers spray, such as iron, zinc and manganese, on the biomass of Eucommia ulmoides Olive leaves and the contents of total polyphenols, flavonoids and chlorogenic acid(CA) in leaves were studied. Quadratic saturation D-optimization design was used to carry out the foliage spray. The equation of fertilizer effect of Fe, Zn, and Mn were established by stepwise regression method, and optimized by frequency analysis method. The result showed that the effects of Fe, Zn, and Mn on E. ulmoides leaves were not linear accumulation of individual effects. There were interactions between the factors. During the fertilization process, interaction effects should be considered synthetically to find the balance point of fertilizer application. The suitable fertilizer application for leaves of E. ulmoides were FeSO4•5H2O 0.20 % - 0.22 %, ZnSO4•7H2O 0.17 % - 0.21 % and MnSO4•5H2O 0.18 % - 0.21 %. Under the condition of Fe 0.21 %, Zn 0.19 % and Mn 0.20 %, the biomass of leaves was 220 g each, content of total polyphenol was 6.212 %, content of flavones was 3.611 % and content of chlorogenic acid was 1.918 %, which was significantly better than the control group. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Characterization Methods of Wood Ultrastructure and Its Research Progress北大核心CSCD

The characterization methods of wood cell wall ultrastructure were generally reviewed in the context.In particular,four approaches including the X-ray diffraction, nuclear magnetic resonance, atomic force microscopy and confocal Raman microscopy, were detailed in their application and research status, which could provide the methods and ideas for future exploration of the microphase structure of wood. Additionally,the advantages and limitations of each technology were also summarized.Moreover,the existing drawbacks and future direction of cell wall structure research were clearly pointed out. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Effect of Pretreatment Methods on Cellulase Adsorption Profiles of Sugarcane Bagasse北大核心CSCD

The effects of two pretreatment methods, sulfite (SPORL) pretreatment and dilute sulfuric acid (DA) pretreatment, on the enzymatic hydrolysis of sugarcane bagasse (SCB) substrates were investigated and the adsorption of cellulose on SCB during the hydrolysis was studied. The enzymatic hydrolysis efficiency, composition, surface morphology, adsorption isotherms and kinetics of two kinds of pretreated SCB were compared. The results showed that the enzymatic hydrolysis efficiency of SPORL-SCB(81.92%) was significantly higher than that of DA treated SCB(60.89 %). Compared with the untreated SCB, the surface of SCB treated by SPORL and DA became rough, the surface fibres were partially stripped and the internal fibre skeleton was exposed. The holocellulose contents of these two treated SCB substrates were not significantly different, but the Klason lignin content of SPORL treated SCB was lower. The XPS images suggested that the treated SCB substrates both adsorbed cellulase. The adsorption isotherm and kinetics curves showed that the maximum adsorption of cellulase on SPORL treated SCB was 61.91 mg/g and lower than that on DA treated SCB(82.69 mg/g), but the adsorption affinity and adsorption strength of SPORL treated SCB were higher than those of the DA treated SCB. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Isolation and Identification of Antifungal Ingredients from Artemisia hedinii北大核心CSCD

The extraction of Artemisia hedinii Ostenf. et Pauls(A. hedinii) were rough and further isolated by chromatographic separation technology, and the antifungal activity of the component was evaluated by the the spore germination method. Furthermore, the composition of antimicrobial components was analyzed by high performance liquid chromatography-mass spectrometry (HPLC-MS). The results showed that 13 kinds of components(Fr.1-Fr.13) were rough isolated from the extraction of A. hedinii, in which the component Fr.5 showed the best antifungal activity. Four kinds of components (Fr.5.1-Fr.5.4) were obtained by the further separation of the component Fr.5. The EC50 of A. hedinii crude extraction on Alternaria alternate (A.alternate) spores was 5.04 g/L, and that of the component Fr.5.2 was 0.57 g/L. The HPLC-MS results showed that the components of Fr.5.2 mainly contained deoxy double hydroxyl artemether (17 %),deoxy dihydroartemisinin (43.65 %) and deoxyartemisinin (16.15 %). The content of dihydroartemisinin of component Fr.5.2 was calculated as 40.95 % by using dihydroartemisinin as the standard. The EC50 of dihydroartemisinin on A.alternate was 2.70 g/L, indicating that the major antifungal matter in component Fr.5.2 was artemisinin derivatives. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Technology of Microwave-assisted Extraction of Sapindus Peel Polysaccharide and Its Antioxidant Activity北大核心CSCD

The microwave extraction technology and in vitro antioxidant capacity of polysaccharides from Sapindus peel were studied in this work, and the primary structure of the polysaccharide was also characterized. The effects of microwave extraction temperature, extraction time and liquid-solid ratio on the yield of polysaccharides were investigated. The microwave extraction process was optimized by response surface analysis. The results showed that the optimum extraction process conditions were as follows: extraction temperature 92 ℃, extraction time 26 min, liquid-solid ratio 25:1(mL:g). The maximal yield of polysaccharides reached 3.47%. Sapindus peel polysaccharide is mainly composed of glucose, xylose, galactose, arabinose and fructose, with typical polysaccharide IR characteristics. In addition, the anti-oxidative activity of polysaccharides was evaluated by the scavenging ability on hydroxyl radicals and DPPH free radicals. Sapindus peel polysaccharides showed strong antioxidant activity in a concentration-dependent manner, and the antioxidant activity of the crude polysaccharides was significantly higher than that of purified polysaccharides. The antioxidant activity of polysaccharides has a certain correlation with the glycoprotein structure. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Preparation and Metal Ion Adsorption Performance for Heavy Metals of Nitrogen-doped Carbon Aerogels Prepared from Cellulose via Hydrothermal Carbonization Method北大核心CSCD

Nitrogen-doped carbon aerogel (NCA) was prepared via hydrothermal carbonization with microcrystalline cellulose(MCC) as precursor and ovalbumin (OVA) as dopant. Here, ovalbumin acted double roles: One was the donor of nitrogen source, the other was the structural directing agent. Morphology, pore structure, crystal structure and surface chemical properties of NCA were characterized by scanning electron microscope (SEM), nitrogen adsorption-desorptiom, X-ray diffraction(XRD), Fourier transform infrared-spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS). Pb2+ and Cr6+ were used as adsorption substrates to explore the adsorption properties of NCA in the aqueous phase. Adsorption equilibria and kinetic behaviour of Pb2+ and Cr6+ were assessed by altering parameters such as agitation time and metal ions' concentration through implementing batch experiments. The results showed that the NCA was amorphous with three-dimensional network structure; specific surface area of NCA was 134.48 m2/g; average pore diameter was 12.28 nm; total pore volume was 0.413 0 m3/g. NCA was mainly composed of element of C, N, O. C〖FY=,*2〗O, -COOH and C-N functional groups were detected on the surface of NCA. N was mainly existed in the form of nitrosyl, amino, pyridine and quaternary ammonium. The adsorption process of Pb2+ and Cr6+ on NCA followed Langmuir model and the pseudo-second-order kinetic model better. NCA exhibited higher adsorption capacity and faster kinetics than CA. The maximum adsorption capacities of Pb2+ and Cr6+ on NCA at 25 ℃ achieved 223.98 mg/g, 35.12 mg/g, respectively and the correspondind capacities on CA were 65.78 and 16.65 mg/g. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Synthesis and Properties of Fumaropimaric Acid Modified RTV Silicone Rubber北大核心CSCD

Fumaropimaric acid modified aminopropyltriethoxysilane(FA) was prepared by derivative reaction with rosin as raw material and the structure of the product was confirmed by FT-IR, 1H NMR and 13C NMR. Fumaropimaric acid modified room temperature vulcanized(RTV)silicone rubber was prepared by the dealcoholization condensation reaction of crosslinking agent(FA) and hydroxyl end-blocked dimethylsiloxane(PDMS). And the effects of hydrogenated phenanthrene ring of rosin on the morphology, mechanical and thermal properties of fumaropimaric acid modified RTV silicone rubber were studied, it was found that fumaropimaric acid modified RTV silicone rubber had better the mechanical and thermal properties compared to the unmodified silicone rubber. The tensile strength and elongation at break were 1.22 MPa and 315%; and The 10% mass loss temperature increased to 472 ℃ (SRFA-1), the greatest rate of mass loss temperature increased to 569 ℃, and the residual rate was 3.88%, respectively. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.     

Effects of Liquid Crystalline Epoxy Resin on the Properties of Bio-based Cardanol-furfural Resin北大核心CSCD

By using polarized optical microscopy, differential scanning calorimetry, scanning electron microscopy and impact strength measurements,the effects of liquid crystalline on the morphologies, thermal properties and mechanical properties of the composite resins were studied. It was found that the synthesized 4,4-diglycidyloxybiphenyl (BP) and sulfanilamide (SAA) were used to generate novel liquid crystalline (LC) epoxy resins notably. The results revealed that the curing of the cardanol-furfural resins was accelerated and the thermal properties were considerably improved by adding the LC epoxy resins.When the addition of BP-SAA was 50%, the glass transition temperature increased from 60.4 ℃ to 70.2 ℃, and the thermal decomposition temperature increased from 300.3 ℃ to 377.4 ℃, respectively. When the addition of BP-SAA was 30%, the impact strength of the modified resins was 15 kJ/m2 and about three-fold higher than that of the unmodified counterpart. © 2018, Editorial Board of «Chemistry and Industry of Forest Products». All right reserved.