合成和对聚乙-乙-乙-乙-乙Triblock共聚合物的比较研究,用于作为聚氨
Pengzhi Bi1,2, Xiuzhong Zhu1,2,3, Jinbang Han1,2
1State Key Laboratory of Biobased Material and Green Papermaking, Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Faculty of Light Industry, Shandong Academy of Sciences, Qilu University of Technology, Jinan 250353, China.
Polymers
|August 26, 2023
概括
这项研究探讨了基终结聚乙烯 (HTPB) 微结构如何影响triblock共聚合物和聚氨的特性. 降低HTPB 1,2含量降低了共聚合物粘度和玻璃过渡温度,而增加HTPB 1,2含量提高了聚氨强度.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
背景情况:
- 基终结聚乙烯 (HTPB) 是聚氨合成中的关键成分.
- HTPB的微观结构可以显著影响衍生聚合物的特性.
- 了解这些结构性质关系对于定制聚氨性能至关重要.
研究的目的:
- 研究HTPB主链微结构对triblock共聚合物和聚氨特性的影响.
- 为了合成和描述新型聚乙烯修饰的HTPBtriblock共聚合物.
- 评估由此产生的聚氨弹性体的机械和热性能.
主要方法:
- 使用具有不同微观结构的HTPB,对四二 (THF) 和氧化物 (PO) 的电离环开放共聚合.
- 使用合成的triblock共聚合物作为软片段和二酸 (TDI) 作为硬片段制备聚氨弹性体.
- 对triblock共聚物粘度,玻璃过渡温度 (Tg) 和热分解温度的分析.
- 评估聚氨弹性体的断裂强度,断裂时的延长和结晶性质.
主要成果:
- 特里布洛克共聚物表现出较低的粘度和Tg,HTPB 1,2结构含量降低.
- 聚氨弹性体的破裂强度增加,破裂时延长减少,因为HTPB 1,2结构含量增加.
- 与PU-2和PU-3相比,PU-1表现出优越的结晶特性.
- HTPB微观结构的变化对聚氨弹性体的表面特性的影响最小.
结论:
- HTPB微观结构是确定衍生型triblock共聚合物和聚氨的特性的一个关键因素.
- 定制HTPB的1.2结构含量允许对聚氨机械性能进行可控调整.
- 该研究提供了关于设计具有特定特征的先进聚氨材料的见解.
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