• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Polymers and the Environment >Novel Tough Crystalline Blends of Polylactide with Ethylene Glycol Derivative of POSS
【24h】

Novel Tough Crystalline Blends of Polylactide with Ethylene Glycol Derivative of POSS

机译：聚乳酸与POSS乙二醇衍生物的新型坚韧结晶共混物

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

Blending of polylactide (PLA) with low stereoregularity and polyhedral oligomeric silsesquioxane grafted with arms of poly(ethylene glycol) methyl ether, acting as a plasticizer, allowed us previously to obtain a novel stable elastomeric-like material. The present contribution focuses on the properties of semi-crystalline PLA plasticized with this compound. Melt blends of PLA with 5-15 wt% of the plasticizer, were compression molded, quenched and annealed, which enabled cold-crystallization. The glass transition temperature of the blends and their drawability depended on their crystallinity and plasticizer content. The best ductility was reached at the plasticizer content of 15 wt%; the achieved strain at break was 6.5 (650%) and 1.3 (130%), for the quenched and annealed material, respectively. The latter value exceeded 20 times the strain at break of neat crystalline PLA. The tensile toughness of the annealed 15 wt% blend was 12 times larger than that of crystalline PLA. Moreover, annealing of 15 wt% blend improved its yield strength by 40%. Despite the two peaks of the loss modulus, indicating the two glass transitions in this blend, no heterogeneities were found by scanning electron microscopy, indicating that the plasticizer enriched phase formed instead of distinct inclusions of the plasticizer.
机译：具有低立构规整度的聚丙交酯（PLA）和接枝有聚（乙二醇）甲醚支链的多面体低聚倍半硅氧烷的混合物，可作为增塑剂，使我们以前能够获得新型的稳定的类弹性体材料。目前的贡献集中在用该化合物增塑的半结晶PLA的性能上。将PLA与5-15 wt％的增塑剂的熔融共混物压模，淬火和退火，从而实现冷结晶。共混物的玻璃化转变温度及其可拉伸性取决于其结晶度和增塑剂含量。增塑剂含量为15 wt％时，可达到最佳延展性。淬火和退火材料的断裂应变分别为6.5（650％）和1.3（130％）。后者的值超过了纯净PLA断裂时应变的20倍。退火的15 wt％共混物的拉伸韧性是结晶PLA的12倍。而且，对15重量％的共混物进行退火将其屈服强度提高了40％。尽管损失模量有两个峰，表明该共混物中有两个玻璃化转变，但通过扫描电子显微镜未发现不均一性，表明形成了增塑剂富集相，而不是明显包含了增塑剂。

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