A Comparative study of redox parameters and electrochemical impedance spectroscopy of polycarbazole derivatives on carbon fiber microelectrode

In this study, N-Carbazole and its derivatives (N-Vinylcarbazole, N-Ethylcarbazole, N-Vinylbenzylcarbazole, and N-Benzylcarbazole) were electrochemically polymerized on carbon fiber microelectrodes (diameter ∼7 μm) by cyclic voltammetry within a potential range from 0.0 to 1.4 V. Redox parameters, Scanning electron microscopic (SEM) images were determined and also capacitance behaviors of polymers were examined via electrochemical impedance spectroscopy (EIS). EIS measurements of polycarbazole derivatives were given comparatively. The existence of a capacitance behavior is shown by Nyquist, Bode magnitude, Bode-phase, Admittance plots relationship. Although the highest low frequency capacitance (C_LF=12901 μA cm⁻²) and maximum phase angle of 81.9 ° at a frequency of 1 Hz were obtained for N-Vinylbenzylcarbazole, the lowest anodic and cathodic potential difference (ΔE=0.04 V) and double layer capacitance (C _dl =0.11 μA cm⁻²) were indicated in 0.1 M LiClO₄/PC.     

Capacitive behaviors and monomer concentration effects of poly(9-benzyl-9<Emphasis Type="Italic">H</Emphasis>-carbazole) on carbon fiber microelectrode

In this work, 9-benzyl-9H-carbazole (BzCz) monomer was chemically synthesized by a new process. It was electrocoated on carbon fiber microelectrode (CFME) as an active electrode material in 0.1 M sodium perchlorate (NaClO₄)/acetonitrile (ACN) solution. The electropolymerization process was successfully performed less amount of 3 mM. The characterization of Poly(BzCz)/CFME thin films was performed by Fourier transform infrared reflectance-attenuated total reflection spectroscopy (FTIR-ATR) and Electrochemical impedance spectroscopy (EIS). The effects of monomer concentrations (1, 2, and 3 mM) during the preparation of modified electrodes were examined by EIS. Capacitive behaviors of modified CFMEs were defined via Nyquist, Bode-magnitude and Bode-phase plots. Variation of capacitance values by initial monomer concentration and specific capacitance values are presented. The highest specific capacitance value for a potensiodynamically prepared polymer thin film in the initial monomer concentration of 1 mM with a charge of 4.54 mC cm⁻² was obtained about 221.4 μF cm⁻². An equivalent circuit model, R(C(R(QR)))(CR), for different concentrations of Poly(BzCz). CFME was proposed and experimental data were simulated to obtain the numerical values of circuit components.     

Gold recovery using inherently conducting polymer coated textiles

The ability of inherently conducting polymer (ICP) coated textiles to recover gold metal from aqueous solutions containing [AuCl₄]⁻ was investigated. Nylon-lycra, nylon, acrylic, polyester and cotton were coated with a layer of polypyrrole (PPy) doped with 1,5-naphthalenedisulfonic acid (NDSA), 2-anthraquinonesulfonic acid (AQSA) orp-toluenesulfonic acid (pTS). Textiles coated with polyaniline (PAn) doped with chloride were also used. The highest gold capacity was displayed by PPy/NDSA/nylon-lycra, which exhibited a capacity of 115 mg Au/g coated textile, or 9700 mg Au/g polymer. Varying the underlying textile substrate or the ICP coating had a major effect on the gold capacity of the composites. Several ICP coated textiles recovered more than 90% of the gold initially present in solutions containing 10 ppm [AuCl₄]⁻ and 0.1 M HCl in less than 1 min. Both PPy/NDSA/nylon-lycra and PAn/Cl/nylon-lycra recovered approximately 60% of the gold and none of the iron present in a solution containing 1 ppm [AuCl₄]⁻, 1000 ppm Fe³⁺ and 0.1 M HCl. The spontaneous and sustained recovery of gold metal from aqueous solutions containing [AuCl₄]⁻ using ICP coated textiles has good prospects as a potential future technology.     

用于测定黑茶中铅的荧光增强化学传感器

铅(Ⅱ)对固定在增塑的聚氯乙烯(PVC)敏感膜中的红霉素A有可逆荧光增强作用,据此研制了测定铅(Ⅱ)的荧光化学传感器。该传感膜的组成为:50.0 mg PVC、100.0 mg邻苯二甲酸二异辛酯和2.94 mg红霉素A。该传感器在pH 8.0的Tris-HCl缓冲溶液中,测定铅(Ⅱ)的动力学范围为4.00~6.00 mmol·L~(-1),检出限为0.10μmol·L~(-1),响应时间小于50 s。该传感器具有良好的重现性、可逆性和选择性,除Cr_2O_7~(2-)和MnO_4~-外,常见阴离子和阳离子不干扰测定。该传感器应用于黑茶水样中铅(Ⅱ)含量的测定,结果与GB 5009.12—2010法一致。     

An anion sensor based on calix[4]arene-Reichardt’s dye

A highly selective colorimetric displacement assay for anions, F⁻ and H₂PO₄ ⁻, based on calix[4]arene-Reichardt’s dye was studied in DMSO. When calix[4]arene forms a complex with Reichardt’s, the absorption peak at 386, 419 and 632 nm disappeared. Addition of anions to solution of calix[4]arene-Reichardt’s dye causes the blue color of Reichardt’s dye to return as it is displaced from the calix[4]arene. These results demonstrate that this displacement assay can be favorably utilized for the development of potential sensors for the detection of anion such as F⁻ and H₂PO₄ ⁻ in relation to the other anions.     

Preparation and characterization of a novel nanofiltration membrane

In this study, poly[2-(N, N-dimethyl amino)ethyl methacrylate] (PDMAEMA) was prepared by bulk polymerization using AIBN as an initiator. Aqueous PDMAEMA solution was then purified by hollow fiber ultrafiltration membrane technology to remove oligomers. PDMAEMA/polysulfone (PSF) positively charged nanofiltration (NF) membrane was developed by interfacial polymerization by using PSF ultrafiltration membrane as the substrate, PDMAEMA aqueous solution as the coating solution and p-xylylene dichloride dissolved in n-heptane as the organic crosslinker. Effects of substrate material, concentration of monomer, pH value of PDMAEMA, coating time and crosslinking time were then carefully examined on the separation properties of the prepared NF membrane. Data suggested that the rejection rate of the composite NF membrane to 1 g/l of MgSO₄ was around 86.7 %, and the water flux was about 18.4 L·m⁻²·h⁻¹. Therefore, the developed NF membrane is suitable for rejection and desalination of alkaline dyes.     

Fabrication and characterization of nano Al<Subscript>2</Subscript>O<Subscript>3</Subscript> filled PVA:NH<Subscript>4</Subscript>SCN electrolyte nanofibers by electrospinning

Present paper reports a method of preparing polymer composite electrolyte nanofiber mat using polyvinyl alcohol (PVA), ammonium thiocynate (NH₄SCN) salt, and aluminium oxide (Al₂O₃) nano particles based on electrospinning technique. Two-stage process of preparation of nanofibers, namely, preparation of nano particles filled PVA electrolyte gel solution followed by its electrospinning has been used. The so obtained nanofibers have been characterized by XRD, DSC, SEM, and Conductivity measurements. XRD patterns affirm the formation of nanocomposite while SEM pictures reveal formation of fibers on a nano scale format (300–800 nm). Fibers of the electrolytes are seen to be thermally stable. Ionic conductivity of electrolyte fiber is seen to improve in the presence of nano filler at room temperature with a maximum at 5.31×10⁻³ Scm⁻¹ for 4 wt% filler concentration, which is comparable to that for corresponding dried gel electrolyte films.     

Surface characterization of aromatic thermotropic liquid crystalline fiber deposited by nanostructured silver

Nanostructured silver thin films were sputtered onto the aromatic thermotropic liquid crystalline fibers of Vectran by magnetron sputtering technology. Plasma treatment was used as pre-treatment in order to improve the deposition of the coating layer. Surface morphology of the coated fibers was examined by scanning electron microscopy (SEM) and atomic force microscopy (AFM). A full energy dispersive X-ray analysis (EDX) was used to detect the elemental composition of the material. Its conductivity and mechanical properties were measured and analyzed as well. The study revealed that a very thin conductive silver deposition exhibited high electrical conductivity as well as less influence on the mechanical properties of the pre-treated Vectran fiber. The plasma treatment could improved the deposition of the coating layer, but the surface roughness caused by plasma treatment also affected the surface conductivity. It was found that the surface resistivity could reach very low value of 1.66×10⁻³ Ω·cm after sputtering deposition for 30 min.     

Synthesis and electropolymerization of 9-tosyl-9<Emphasis Type="Italic">H</Emphasis>-carbazole,electrochemical impedance spectroscopic study and circuit modelling

This work reports on the newly synthesized 9-tosyl-9H-carbazole (TsCz) monomer. Capacitive properties of the electrochemically grown homopolymer, poly(TsCz) film on carbon fibre microelectrode (CFME), are characterised by cyclic voltammetry (CV), Fourier transform infrared reflectance-attenuated total reflection spectroscopy (FTIR-ATR), scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). Different monomer concentrations (1, 3 and 10 mM) were used for electrodeposition in 0.1 M sodium perchlorate (NaClO₄)/acetonitrile (ACN) solution. The capacitive behaviour of modified CFMEs was defined via Nyquist, Bode-magnitude and Bode-phase plots. An equivalent electrical circuit R(CR)(QR)(CR) for different concentrations of poly(TsCz)/CFME was proposed and experimental data were simulated to obtain the numerical values of the circuit components. The Nyquist plot for poly(TsCz) shows the highest specific capacitance (50.0 mF cm⁻²) at frequency of 0.01 Hz in the initial monomer concentration of 10 mM.     

Structure and performance of fibers prepared from liquefied wood in phenol

The fibers from liquefied wood in phenol (WPFs) were spun by adding hexamethylenetetramine as synthetics and cured by soaking in solution containing hydrochloric acid and formaldehyde as main components. The chemical structure of WPFs remarkably changed from that of liquefied wood was identified by FT-IR spectrometer. WPFs with the average diameter of 27∼42 μm, tensile strength of 230∼356 MPa, and modulus of 15∼31 GPa were obtained using spinning speed of 0.72 μm min⁻¹, hydrochloric acid concentration of 18.5 %, heating rate of 10 °C h⁻¹, and curing time of 4 h. These WPFs showed a high thermal stability and a complex thermal decomposition process by TG(thermogravimetric) analysis. It was also found that the two obvious weight loss temperatures of WPFs were 510°C and 748°C.     

Modeling the tensile strains of non-uniform fibers

The maximum strain experienced by the thinnest segment of a non-uniform fiber governs fiber breakage, yet this maximum strain can not be obtained from a normal single fiber test. Only the average strain of the whole fiber specimen can be obtained from a normal single fiber tensile test. This study has examined the relationship between the average strain, the maximum strain and the degree of fiber non-uniformity, expressed in coefficient of variation (CV) of fiber diameters along fiber length. The tensile strain of irregular fibers has been simulated using the finite element method (FEM). Using this method, average and maximum tensile strains of non-uniform fibers were calculated. The results indicate that for irregular fibers such as wool, there is an exponential relationship (i.e.ɛ _ave ɛ _max=ae ^{−b CV} ) between the ratio of average breaking strain and maximum breaking strain (ɛ _ave ɛ _max) and the along-fiber diameter variation (CV). The strain ratio decreases with the increase of the along-fiber diameter variation.     

The acid doping behavior of polybenzimidazole membranes in phosphoric acid for proton exchange membrane fuel cells

The acid doping behavior of poly(2,2′-(m-phenylene)-5,5′-bibenzimidazole) (PBI) membranes in aqueous phosphoric acid was studied at room temperature. It was found that doping phosphoric acid in the membrane obeyed a multimolecular layer absorption mechanism proposed in this work. Equation, i.e., 1/[L ^T ] _B =(1 − C ₀/17.5)/2.1, was presented to describe the relationship of the acid doping level of membranes and the concentration of the doping acid in a range of 2–14 mol L⁻¹. The acid doping kinetics as well as the influence of the doped acids on the conductivity and mechanical strength of the PBI membranes was investigated.     

Evaluation of bamboo charcoal/stainless steel/TPU composite woven fabrics

Composite woven fabric satisfies what people require. Bamboo charcoal (BC) has been identified as a multifunctional material that has far-infrared ray, anions, deodorization and etc. BC fibers and yarns were made of bamboo charcoal powders and have further become a pervasive materials used in textile industry. In this study, cotton yarns, stainless steel/cotton (SS/C) complex yarn, bamboo charcoal/cotton (BC/C) complex yarns were woven into the plain, twill and Dobby composite woven fabrics. The warp yarn was composed of cotton yarns, and the weft yarn was made up of BC/C and SS/C complex yarns with a picking ratio of 1:1 and 3:1. Thermoplastic polyurethanes (TPU) film was then attached to the composite woven fabrics, forming the BC/SS/TPU composite woven fabrics. Tests of electromagnetic shielding effectiveness (EMSE), far-infrared emissivity, anions, water resistance, and water vapor permeability measured the single-layer, two-layer and four-layer composite woven fabrics, obtaining a far-infrared emissivity of 0.95 by 39.8 counts per minute, an anion count of 149 amount/cc, an EMSE of −11.87 dB under frequency of 900 MHz, a surface resistivity of 8×10⁻⁶ Ω/square, a water resistance of −8219 mmH₂O, and water vapor permeability of 989 g/m²·h and 319 g/m²·24 h in accordance with JIS L 1099 A1 and ASTM E96 BW.     

Potato and Human Exploration of Space: Some Observations from NASA-Sponsored Controlled Environment Studies

Future space exploration by humans will require reliable supplies of food, oxygen and clean water to sustain the expeditions. Potato is one of several crops being studied for such a “life support” role. Tests sponsored by the US National Aeronautics and Space Administration (NASA) confirmed the well-known short day tendencies for tuberisation, but also revealed that some cvs. (e.g., Norland, Denali and Russet Burbank) could tuberise well under continuous high light. Horticultural tests showed that plants grew well and tuberised readily using a nutrient film technique (NFT). CO₂ enrichment studies with potato showed typical C₃ responses in photosynthesis and yield, with maximum rates occurring near 1000 μmol mol⁻¹. The highest tuber yields from these controlled environment studies reached 19.7 kg FM m⁻² or equivalent to nearly 200 t ha⁻¹. This equated to a productivity of 38 g m⁻² DM m⁻² day⁻¹. Stand evapotranspiration (ET) rates ranged from 3.4 to 5.2 l m⁻² day⁻¹ throughout growth, while maximum ET rates for canopies could approach 10 l m⁻² day⁻¹. Harvest indices (tuber DM/total DM) typically ranged from 0.7 to 0.8, indicating that waste (inedible) biomass from potato would be less than that from many other crops. An experiment was conducted in 1995 on NASA’s Space Shuttle using excised potato leaves to study tuber formation at axillary buds during spaceflight. The results showed that tubers formed equally well in space as in the ground controls, indicating that reduced gravity should not be an impediment to tuberisation.     

Surface and subsurface losses of N and P from salt-affected rice paddy fields of Saemangeum reclaimed land in South Korea

The present study was carried out to evaluate nutrient losses that occur during the course of agricultural activity from rice paddy fields of reclaimed tidal flat. For this study, we chose a salt-affected rice paddy field located in the Saemangeum reclaimed tidal area, which is located on the western South Korean coasts. The plot size was 1,000 m² (40 m × 25 m) with three replicates. The soil belonged to the Gwanghwal series, i.e., it was of the coarse silty, mixed, mesic type of Typic Haplaquents (saline alluvial soil). The input quantities of nitrogen and phosphorus (as chemical fertilizer) into the experimental rice paddy field were 200 kg N ha⁻¹ and 51 kg P₂O₅ ha⁻¹ per annum, and the respective input quantities of each due to precipitation were 9.3–12.9 kg N ha⁻¹ and 0.4–0.7 kg P ha⁻¹ per annum. In terms of irrigation water, these input quantities were 4.5–8.2 kg N ha⁻¹ and 0.3–0.9 kg P ha⁻¹ per annum, respectively. Losses of these nutrients due to surface runoff were 22.5–38.1 kg N ha⁻¹ and 0.7–2.2 kg P ha⁻¹ for the year 2003, and 26.8–29.6 kg N ha⁻¹ and 1.6–1.9 kg P ha⁻¹ for the year 2004, respectively. Losses of these nutrients due to subsurface infiltration during the irrigation period were 0.44–0.67 kg N ha⁻¹ and 0.03–0.04 kg P ha⁻¹ for the year 2003, and 0.15–0.16 kg N ha⁻¹ and 0.05–0.06 kg P ha⁻¹ for 2004. When losses of nitrogen and phosphorus were compared to the amount of nutrients supplied by chemical fertilizers, it was found that 11.3–19.1% of nitrogen and 0.5–1.7% of phosphorus were lost via surface runoff, whereas subsurface losses accounted to 0.2–0.8% for nitrogen and only 0.02–0.04% for phosphorus during the 2-year study period.     

Preparation of starch-based polyurethane films and their mechanical properties

In this study, polyurethane films were prepared using starch as the main polyol component, and the mechanical properties of these films were investigated. The starch content of the polyols was 30–50 wt%. To confirm the formation of a urethane linkage between the −OH of starch and −NCO of toluene 2,4-diisocyanate, Fourier transform infrared (FT-IR) spectroscopic analysis was performed. Differential scanning calorimetry (DSC) thermograms of the polyurethanes resulted in two endothermic peaks, which shifted to higher temperatures with increasing starch content and −NCO/−OH molar ratio. Due to the melting behavior of polyurethane, films could be prepared by hot pressing at an appropriate temperature. Polyurethane films were prepared with various polyol starch content and −NCO/−OH molar ratios. Tensile testing indicated that the breaking stress and elastic modulus increased significantly with starch content and −NCO/−OH molar ratio. In addition, bending tests indicated an increase in breaking stress and bending modulus with starch content and −NCO/−OH molar ratio and decreased breaking strain. The strain rate in both tensile and bending tests had a significant effect on the mechanical properties.     

Improvement of mechanical and electrical properties of poly(ethylene glycol) and cyanoresin based polymer electrolytes

Ionic conductivity and mechanical properties of a mixed polymer matrix consisting of poly(ethylene glycol) (PEG) and cyanoresin type M (CRM) with various lithium salts and plasticizer were examined. The CRM used was a copolymer of cyanoethyl pullulan and cyanoethyl poly(vinyl alcohol) with a molar ratio of 1:1, mixed plasticizer was ethylene carbonate (EC) and propylene carbonate (PC) at a volume ratio of 1:1. The conductive behavior of polymer electrolytes in the temperature range of 298∼338 K was investigated. The PEG/LiClO₄ complexes exhibited the highest ionic conductivity of ∼10⁻⁵ S/cm at 25°C with the salt concentration of 1.5 M. In addition, the plasticized PEG/LiClO₄ complexes exhibited improvement of ionic conductivity. However, their complexes showed decreased mechanical properties. The improvement of ionic conductivity and mechanical properties could be obtained from the polymer electrolytes by using CRM. The highest ionic conductivity of PEG/CRM/LiClO₄/(EC-PC) was 5.33×10⁻⁴ S/cm at 25°C.     

Einige physikochemische Eigenschaften des Kartoffel-virus M

Zusammenfassung Die Sedimentationskonstante S _20.w ^° des Kartoffelvirus M (KVM) betr?gt 167±1 S. Die Konzentrationsabh?ngigkeit ergibt sich aus der Beziehung s _20.w ^c =(167−33×c) S. Die Schwebedichte des KVM in C?siumchlorid (⌕ _C5C1 ²⁵ ) betr?gt 1,321 bis 1,322 g/ml. Mit Hilfe der SDS-Polyacrylamid-Gelektrophorese fanden wir zwei Proteine mit Molekülmassen von 35 700 und 33 000 Dalton. Die Nukleins?ure des KVM ist eine einstr?ngige RNS mit einer Molekülmasse von 2,38×10⁶ Dalton (nicht denaturierende Bedingungen) bzw. 2,14×10⁶ Dalton (nach Formaldehydbehandlung). Damit ist das KVM ein typischer Vertreter der Carlavirus-Gruppe.

---

Summary Particles of potato virus M (PVM) were purified by the method of Proll & Richter (1979). After sugar density gradient centrifugation, preparations had a high level of purity and were homogeneous when examined under the electron microscope and in the analytical ultra-centrifuge. The sedimentation constant of particles (s°) is 167±1 S and the concentration relation s _20.w ^c =(167−33×c)S, where c is in mg/ml. The density of the PVM particles in caesium chloride (⌕ _C5C1 ²⁵ ) is 1.321 to 1.322 g/ml, with tobacco mosaic virus particles (density=1.325 g/ml) as a standard. In SDS-polyacrylamide gel electrophoresis, PVM protein sub-units migrated as two compounds with apparent sizes of 35 700 and 33 000 daltons, respectively. PVM nucleic acid is single stranded RNA, as shown by its positive orcinol and negative diphenylamine reactions, its degradation by RNase and its temperature melting curve. The RNA comprised 5.4% of the particle weight and its estimated molecule size was 2.38×10⁶ daltons (undenatured) and 2.14×10⁶ daltons (treated with formaldehyde). Physicochemical data on PVM are summarized in Table 1. The cryptogram of PVM is R/1: 2.4/5.4: E/E: S/Ap, carlavirus group.

---

Résumé é virus M de la pomme de terre (PVM) a été urifié selon la méthode Proll & Richter 979). Après deux centrifugations selon la chnique du gradient de sucrose, nous avons btenu des préparations purifiées qui se sont firmées très homogènes au microscope ectronique, ainsi qu’avec l’ultracentrifugeuse analytique. Nous avons observé un effet de concentration de la valeur S et avons éterminé la constante de sédimentation (s^O) à aide de distribution de S dans une zone de concentration de 0,5 à 0,1 mg de virus/ml à 57±1 S. L’effet de concentration peut être obtenu ar la relation s _20.w ^c =(167−33×c)S, dont c at à utiliser en mg/ml. La densité spécifiquedu PVM dans le aloride de césium (⌕ _C5C1 ²⁵ ) est de 1,321 à 322 g/ml avec le virus de la mosa?que du abac comme marqueur, dont la densité est de 1,325 g/ml. Les masses moléculaires des capsomers ont été déterminées à l’aide de la SDS-polyacrylamide-gel-electrophorèse. Nous avons observé deux zones de protéines dont la masse moléculaire calculée fut de 35 700 et 33 000 dalton. L’acide nucléique du PVM comprend une spirale ARN; ceci a été obtenu avec la réaction positive d’orcine, des essais de catabolisme avec la RNase et de la courbe de fusion. Le poids représente 5,4 % de celui de la particule. La masse moléculaire est de 2,38×10⁶ dalton (conditions non dénaturantes) 2,38×10⁶ (après traitement au formaldéhyde). Dans le tableau 1 sont résumées les données physicochimiques du PVM selon Proll & Richter (1979). Le cryptogramme suivant a été obtenu: R/1: 2,4/5,4: E/E: S/Ap, ce qui permet de classer ce virus dans le groupe Carla.

     

Correlating the fineness and residual gum content of degummed hemp fibres

It is well known residual gum exists in degummed or retted hemp fibres. Gum removal results in improvement in fibre fineness and the properties of the resultant hemp yarns. However, it is not known what correlation if any exists between the residual gum content in retted hemp fibres and the fibre fineness, described in terms of fibre width in this paper. This study examined the mean width and coefficient of variation (CV) of fibre width of seventeen chemically retted hemp samples with reference to residual gum content. The mean and CV of fibre width were obtained from an Optical fibre diameter analyser (OFDA 100). The linear regression analysis results show that the mean fibre width is directly proportional to the residual gum content. A slightly weaker linear correlation also exists between the coefficient of variation of fibre width and the residual gum content. The strong linear co-relation between the mean of fibre width and the residual gum content is a significant outcome, since testing for fibre width using the OFDA is a much simpler and quicker process than testing the residual gum content. Scanning Electron Microscopy (SEM) reinforces the OFDA findings. SEM micrographs show a flat ribbon like fibre cross-section hence the term “fibre width” is used instead of fibre diameter. Spectral differences in the untreated dry decorticated skin samples and chemically treated and subsequently carded samples indicate delignification. The peaks at 1370 cm⁻¹, 1325 cm⁻¹, 1733 cm⁻¹, and 1600 cm⁻¹ attributed to lignin in the untreated samples are missing from the spectra of the treated samples. The spectra of the treated samples are more amine-dominated with some of the OH character lost.     

Poly(vinylidene fluoride)/poly(ethylene-co-vinyl acetate) (20/80) blend. I. Miscibility and crystallization behavior

The miscibility and crystallization behavior of the blends of poly(vinylidene fluoride) (PVDF) and ethylene/vinyl acetate(20/80) copolymer (EVAc80) have been studied using a differential scanning calorimeter and a polarizing microscope equipped with a heating stage. From the melting point depression, the values of interaction energy densityB were calculated to be −1.3004 (cal/cm³) and the Flory-Huggins interaction parameterχ ₁₂ was found to be −0.0818 at 445.6 K. With increasing concentration of EVAc80, the radial growth rate of spherulite was reduced drastically. The FT-IR analysis of samples quenched from the melt to various temperatures showed increasing content ofβ-phase with increasing amount of blended EVA80 along with lower quenching temperature.