首页> 外文OA文献 >Effect of microphase-separation promoters on the shape-memory behavior of polyurethane
【2h】

Effect of microphase-separation promoters on the shape-memory behavior of polyurethane

机译:微相分离促进剂对聚氨酯形状记忆行为的影响

摘要

A series of segmented polyurethanes (PUs) with novel thermosensitive shape-memory behavior were synthesized via the in situ addition of a small amount of 1octadecanol (ODO) to a PU system. For comparison, liquid paraffin (LP) modified PUs were also synthesized. The effects of a small amount of ODO or LP on the PU supra-structure and the thermosensitive shape-memory properties were studied with X-ray diffraction, differential scanning calorimetry, dynamic mechanical analysis, and shape-memory studies. The results indicated that the in situ addition of a small amount of ODO (e.g., 0.3 wt %) remarkably promoted microphase separation, facilitating the ordered packing of soft segments and the formation of perfect hard-segment domains and thus significantly improving the shape-memory properties. In contrast, LP had less significant influence on the shape-memory behavior because of the macrophase separation of these nonpolar alkyl chains from the PU system.
机译:通过向PU系统中原位添加少量的1-十八醇(ODO),合成了一系列具有新颖的热敏形状记忆行为的分段聚氨酯(PU)。为了进行比较,还合成了液体石蜡(LP)改性的PU。通过X射线衍射,差示扫描量热法,动态力学分析和形状记忆研究,研究了少量的ODO或LP对PU超结构和热敏形状记忆性能的影响。结果表明,原位添加少量的ODO(例如0.3 wt%)显着促进了微相分离,促进了软链段的有序堆积和形成完美的硬链段域,从而显着改善了形状记忆属性。相反,由于这些非极性烷基链从PU系统中大相分离,LP对形状记忆行为的影响较小。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利

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