• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and properties of chitosan-modified poly(vinyl acetate)
【24h】

Synthesis and properties of chitosan-modified poly(vinyl acetate)

机译：壳聚糖改性聚乙酸乙烯酯的合成及性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A redox initiator, cerium ammonium nitrate, was used to initiate the graft copolymerization of vinyl acetate (VAc) onto the chitosan chain in a dispersion polymerization at 60degreesC. With an addition of 0.3-7.5 g of chitosan based on 50 g of VAc, the monomer conversion was found to be between 70 and 80% after 2 h of reaction. The grafting efficiency increased with the amount of chitosan added; yet, the grafting ratio increased slightly and then decreased. After the reaction, a stable dispersion system was observed and the surface of the latex particles was found to be rich in chitosan. All the experimental results indicated that the chitosan molecules not only took part in the graft copolymerization, but also served as a surfactant, providing the stability of the dispersion particles. If the dispersion aqueous solution was oven-dried, a particulate membrane was formed. The experimental results indicated that the incorporation of poly(vinyl acetate) to the chitosan chains increased the toughness and decreased the water absorption of the chitosan material. (C) 2002 Wiley Periodicals, Inc. [References: 22]
机译：氧化还原引发剂硝酸铈铵用于在60℃分散聚合中引发乙酸乙烯酯（VAc）在壳聚糖链上的接枝共聚。基于50g VAc添加0.3-7.5g壳聚糖，发现反应2小时后单体转化率为70-80％。接枝效率随壳聚糖添加量的增加而增加。然而，接枝率略有增加，然后下降。反应后，观察到稳定的分散体系，发现胶乳颗粒的表面富含壳聚糖。所有实验结果表明，壳聚糖分子不仅参与了接枝共聚，而且还充当了表面活性剂，提供了分散颗粒的稳定性。如果将分散体水溶液烘箱干燥，则形成颗粒膜。实验结果表明，聚乙酸乙烯酯掺入到壳聚糖链中增加了韧性并降低了壳聚糖材料的吸水率。 （C）2002 Wiley Periodicals，Inc. [参考：22]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号