...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ACS Omega >Toughening of Poly(l-Lactide) with Branched Polycaprolactone: Effect of Chain Length
【24h】

Toughening of Poly(l-Lactide) with Branched Polycaprolactone: Effect of Chain Length

机译：聚（L-丙交酯）与支链聚己内酯增韧：链长的效果

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this work, a series of branched polycaprolactone (BPCL) samples with different ε-caprolactone (CL) chain lengths were synthesized and used to toughen poly (lactic acid) (PLA). The spherical structure increased the free volume, facilitating the free movement of the PLA chain segment and increasing the ductility. In addition, the hydrogen bonds between the multi-terminal hydroxyl group of BPCL_(x ) and PLA improved the interaction between them. The glass-transition temperatures (T _(g)) and crystallization temperatures (T _(c)) of the blends were significantly lower than those of PLA, and these temperatures increased with the chain length of polycaprolactone. BPCL_(x ) increased the crystallization rate of PLA through heterogeneous nucleation. A longer chain length of CL increased the mutual entanglement in the blends, reduced the hydrogen bonding between BPCL_(x ) and PLA, and increased the entanglement of BPCL_(x ) chains. When the chain length of CL was 6, the impact strength and elongation at break of the PLA/BPCL blends exhibited an increase of 151.72 and 465.8%, respectively, as compared with PLA.
机译：在这项工作中，合成了一系列分支的聚己内酯（BPCL）样品，具有不同ε-己内酯（CL）链长度并用于增韧（乳酸）（PLA）。球形结构增加了自由体积，促进了PLA链段的自由运动并增加延展性。另外，BPCl _（ x）和PLA的多末端羟基之间的氢键改善了它们之间的相互作用。共混物的玻璃化转变温度（ T_（g））和结晶温度（ T _（c））显着低于PLA，并且这些温度随多己内酯的链长而增加。 BPCL _（ x）通过异质成核来增加PLA的结晶速率。 Cl的较长链长度增加了混合物中的相互缠结，降低了BPCl _（ x）和PLA之间的氢键，并增加了BPCl _（ x）链的缠结。当Cl的链长为6时，与PLA相比，PLA / BPCL共混物断裂的冲击强度和伸长率分别显示出151.72和465.8％。

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