| 麦草碱木质素改性聚氨酯的老化降解性能研究 |
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| 引用本文： | 靳帆,方桂珍,刘志明,李克非,李珊珊.麦草碱木质素改性聚氨酯的老化降解性能研究[J].林产化学与工业,2007,27(5):117-121. |
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| 作者姓名： | 靳帆 方桂珍 刘志明 李克非 李珊珊 |
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| 作者单位： | 东北林业大学,生物质材料科学与技术教育部重点实验室,黑龙江,哈尔滨,150040 |
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| 摘 要： | 对麦草碱木质素改性聚氨酯薄膜(PUF)的热稳定性、热水稳定性、紫外光降解性能进行了测定.实验结果表明,加入20%碱木质素的聚氨酯薄膜与不含木质素的PUF相比:热氧化后的拉伸强度保留率由纯聚氨酯的89.3%提高到132.0%,拉伸率保留率由19.6%提高到66.3%;紫外光老化28 d后的拉伸率保留率由纯聚氨酯的9.4%提高到48.6%;热水老化后的拉伸强度保留率由74.8%提高到了95.5%;但加入碱木质素后PUF的耐碱性显著降低.
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| 关 键 词： | 麦草碱木质素 聚氨酯薄膜 热氧降解 水解 光降解 |
| 文章编号： | 0253-2417（2007）05-0117-05 |
| 修稿时间： | 2006-11-10 |
Aging Characterization of Straw Alkali-lignin Modified Polyurethane Film |
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| JIN Fan,FANG Gui-zhen,LIU Zhi-ming,LI Ke-fei,LI Shan-shan.Aging Characterization of Straw Alkali-lignin Modified Polyurethane Film[J].Chemistry & Industry of Forest Products,2007,27(5):117-121. |
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| Authors: | JIN Fan FANG Gui-zhen LIU Zhi-ming LI Ke-fei LI Shan-shan |
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| Institution: | Key Laboratory of Bio-based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, China |
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| Abstract: | The behaviors of thermal-oxidation,UV photolysis and hydrolysis of straw alkali-lignin modified polyurethane films(PUF) were tested respectively.The results show that the retain ratio of tensile strength of thermal-oxidation samples with addition of 20 % lignin was enhanced from 89.3 % to 132.0 % comparied with pure PUF and the retain ratio of elongation was from 19.6 % to 66.3 %,as well as from 9.4 % to 48.6 % under UV for 28 d.The retain ratio of tensile strength after hydrolysis,was enhanced from 74.8 % to 95.5 %.However,the addtion of alkali-lignin reduced remarkably the alkali resistance of PUF. |
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| Keywords: | straw alkali-lignin polyurethane film thermal oxidation hydrolysis photolysis |
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