通过添加双移植共聚合物,显著增强了高摩尔质量聚化物混合物的立体复合结晶
Lizhi Yuan1, Shihao Deng1, Yue Wang1
1College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China.
一种新型的双移植共聚合物促进了在高摩尔质量聚乳/多乳 (PLLA/PDLA) 混合物中的立体复合体 (SC) 结晶. 这种高效的结晶促进剂能够使独家的SC晶体形成,增强聚酸 (PLA) 特性.
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
- 结晶化 结晶化 结晶化
背景情况:
- 立体复合体 (SC) 结晶显著增强了多1乳酸/多2乳酸 (PLLA/PDLA) 混合物特性.
- 在高摩尔质量 (高MW) 的PLLA/PDLA混合物中实现占主导地位的SC结晶是具有挑战性的,原因是竞争性同晶化.
研究的目的:
- 设计和合成双移植共聚合物作为高MW PLLA/PDLA混合物中SC晶体的高效结晶促进剂.
- 调查共聚合物促进独家SC晶体形成和改善聚酸 (PLA) 材料特性的能力.
主要方法:
- 合成具有PLLA和PDLA侧链的双移植共聚合物.
- 将共聚合物纳入高MW PLLA/PDLA 混合物中.
- 在同热和非同热条件下分析结晶行为.
主要成果:
- 合成的共聚合物有效地促进了PLLA/PDLA混合物中优选的SC结晶.
- 只有0.5%重量%的共聚合物添加,可以实现独家的SC晶体形成,抑制同晶化.
- 同聚合物充当兼容剂,抑制相位分离,促进SC核和生长.
结论:
- 一种新型的双移植共聚合物在高MW PLLA/PDLA 混合物中有效诱导立体复合结晶.
- 这种方法提供了一条专门形成SC晶体的途径,克服了与同晶结相关的挑战.
- 这些发现为开发具有增强结晶性的高性能聚酸材料提供了新的策略.
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