使用PDLA-b-PLLA立体块硬域的高性能星级区块亚利发性聚热塑性弹性体
Stephanie Liffland1, Margaret Kumler1, Marc A Hillmyer1
1Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States of America.
ACS macro letters
|September 18, 2023
概括
带有立体复合的多样性 (d-乳酸) /多样性 (l-乳酸) 末端块的星块聚合物提供了增强的性能. 这些可持续的形聚热塑性弹性体表现出更好的热稳定性和可调节的机械性能.
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
- 可持续化学 可持续化学
背景情况:
- 亚利发性聚热塑性弹性体 (APTPEs) 是具有潜在工业应用的可持续材料.
- 星块聚合物由于其复杂的架构而具有独特的材料特性.
- 聚酸中的立体复合可以显著增强热和机械性能.
研究的目的:
- 作为高性能APTPE,探索具有不同多-d-乳化物 (PDLA) 到多-l-乳化物 (PLLA) 比例的星 (ABC) 4聚合物.
- 调查硬域内立体复杂化对材料性能的影响.
- 通过控制块比率和立体复杂晶体形成来证明机械性能的可调性.
主要方法:
- 星块 (ABC) 4聚合物的合成,其核心为聚基甲基烯酸 (PγMCL) 和PDLA/PLLA末端块.
- 具有不同PDLA:PLLA块比的特聚合物的表征.
- 分析热稳定性和机械性能,重点关注立体复杂化的影响.
主要成果:
- 在硬域中对PDLA/PLLA块的立体复合增强了热稳定性和对永久变形的抵抗力.
- 在PDLA:PLLA比率的变化导致可调节的机械性能.
- 立体复杂晶体形成的差异,受到建筑约束的影响,影响了材料特性.
结论:
- 立体复合显著提高APTPEs的机械性能.
- 这些聚合物中硬域的可调性性质允许精确控制材料属性.
- 这些发现有助于开发与现有行业标准相竞争的可持续材料.
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