• 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 Poly(butylene Succinate) with N-Hexenyl Side Branches
【24h】

Synthesis and Properties of Poly(butylene Succinate) with N-Hexenyl Side Branches

机译：带有N-己烯基侧支链的聚丁二酸丁二醇酯的合成及性能

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

N-hexenyl side branches were introduced into poly(butylene succinate) (PES) by polymerization of succinic acid (SA) with 1,4-butanediol (ED) in the presence of 7-octene-l,2-diol (OD). Thermal properties and biodegradability of the aliphatic polyesters were investigated before and after epoxidation of the pendant double bonds. The glass-transition temperature (T_g) decreased with the branching density to give a minimum at 0.03 mol of branching units per mole of structural units. Thereafter, T_g increased due to the in situ crosslinking of the unsaturated groups during the differ- ential scanning calorimetry (DSC) measurements. N-Hexenyl side branches decreased melting temperature (T_m) more significantly than ethyl side branches, but the effect was on par with that by n-octyl branches. Epoxidation of the double bonds decreasedT m and melting enthalpy (#DELTA#H_m), but increased T_g of the aliphatic polyester. Biodegrad- ability was enhanced to some extent by the presence of n-hexenyl side branches. However, the epoxidation of the unsaturated groups did not notably affect the biodegradability.
机译：在7-辛烯-1，2-二醇（OD）存在下，通过琥珀酸（SA）与1，4-丁二醇（ED）的聚合，将N-己烯基侧链引入到聚丁二酸丁二酯（PES）中。在侧链双键环氧化之前和之后研究了脂肪族聚酯的热性能和生物降解性。玻璃化转变温度（T_g）随着支链密度而降低，以每摩尔结构单元0.03mol的支链单元最小。此后，由于在差示扫描量热法（DSC）测量过程中不饱和基团的原位交联，T_g增加。 N-己烯基侧链比乙基侧链显着降低了熔融温度（T_m），但效果与正辛基支链相当。双键的环氧化降低了T m和熔融焓（＃DELTA＃H_m），但是增加了脂族聚酯的T_g。正己烯基侧链的存在在一定程度上增强了生物降解性。然而，不饱和基团的环氧化并未显着影响生物降解性。

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