用极分段定制分支聚乙烯:多功能聚烯材料的战略方法
Jie Yang1,2, Shu-Yang Yu1, Xi-Man Yang1
1State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China.
一种新的分支功能聚乙烯 (PE) 用两步方法合成. 这种新材料整合了极分段,增强了机械性能,并使其能够作为固剂和兼容剂的多功能应用.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 有机合成 有机合成
背景情况:
- 开发具有定制架构的功能性聚合物对于先进的材料应用至关重要.
- 现有的聚乙烯 (PE) 材料往往缺乏足够的极性和机械强度,以满足特殊用途.
- 将极性细分集成到非极性聚合物骨干中提出了合成挑战.
研究的目的:
- 开发一种具有多极分段的新型分支功能聚乙烯 (PE).
- 为了创建一个具有可调节分子量和极/非极比的材料.
- 评估合成PE的机械性能和应用潜力.
主要方法:
- 这是一种两步合成,结合了协调聚合和基聚聚合.
- 使用双核催化剂对乙烯与极性二烯的共聚合,以制造带有甲基酸吊的PE.
- 功能化PE与甲基甲基酸盐 (MMA) 的激进共聚合,以结合PMMA细分.
主要成果:
- 成功合成了具有量身定制的分子重量 (350-2300公斤/mol) 和极/非极比 (1/38-1/3摩尔) 的分支功能PE.
- 纳入PMMA分段显著增强了机械性能,从6.18到19.64MPa增加了断裂强度.
- 由此产生的材料表现出与极性多聚烯弹性体 (POE) 相当的机械性能.
结论:
- 开发的两步合成有效地产生有分支的功能PE与集成的极端段.
- 新的PE材料具有显著的机械增强和多功能应用.
- 这种功能性PE可以作为PMMA的有效硬化剂和POE/PMMA混合物的兼容剂.
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