不同软链长度阴离子尼龙-6-b聚醚胺共聚物的制备及性能研究

Q2 Materials Science
Sheng Xu, Zhenxi Wang, Meng Cao, Xin Dai, Shangxi Zhang, Lingli Liu
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引用次数: 1

摘要

摘要采用不同分子链长度的TDI-PEA引发剂,通过阴离子聚合法制备了单体铸造尼龙-6-b-聚醚胺(MCPA-b-PEA)共聚物。研究发现,由于长链PEA结构,TDI-PEA宏观引发剂在反应过程中表现出较低的反应活性。PEA链长最短的MCPA-b-PEA结晶度最高,球晶最大,晶粒尺寸大。长PEA链长的共聚物具有明显的韧性,短PEA链长的共聚物具有较高的抗拉强度。将其增韧机理推导为裂纹-剪切带机制和多层裂纹扩展机制的结合。图形抽象
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Preparation and Properties of Anionic nylon-6-b-Polyether Amine Copolymers with Varying Soft Chain Length
ABSTRACT Monomer casting nylon-6-b-polyether amine (MCPA-b-PEA) copolymer were prepared through anionic polymerization which initiated by TDI-PEA macroinitiators with varying PEA molecular chain length. It was found that the TDI-PEA macroinitiator showed relatively low reactivity during the reaction process due to the long-chain PEA structure. The MCPA-b-PEA with shortest PEA chain length displayed highest crystallinity and biggest spherulites with large crystal grain size. The copolymers with long PEA chain length showed obvious toughness characteristic while that with short PEA chain length presented high tensile strength. The toughening mechanism was deduced to the combination of craze-shear band mechanism and multilayer crack extension mechanism. GRAPHICAL ABSTRACT
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来源期刊
Polymer-Plastics Technology and Engineering
Polymer-Plastics Technology and Engineering 工程技术-高分子科学
CiteScore
1.71
自引率
0.00%
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0
审稿时长
4 months
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