一种构建新型聚酯作为热塑性弹性体软中间嵌段的简便方法。
A Facile Approach to Construct Novel Polyesters as Soft Midblock for Thermoplastic Elastomers.
作者信息
Xia Yun-Yun, Yang Xing, Zhang Wei, Fu Yang, Cai Zhongzheng, Cao Peng, Zhu Jian-Bo
机构信息
College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, China.
National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), College of Chemistry, Sichuan University.
出版信息
Chemistry. 2024 Sep 11;30(51):e202401727. doi: 10.1002/chem.202401727. Epub 2024 Aug 23.
The development of innovative synthetic strategies to create functional polycaprolactones is highly demanded for advanced material applications. In this contribution, we reported a facile synthetic strategy to prepare a class of CL-based monomers (R-TO) derived from epoxides. They readily polymerize via well-controlled ring-opening polymerization (ROP) to afford a series of polyesters P(R-TO) with high molecular weight (M up to 350 kDa). Sequential addition copolymerization of MTO and -lactide (-LA) allowed to access of a series of ABA triblock copolymers with composition-dependent mechanical properties. Notably, P(-LA)-b-P(MTO)-b-P(-LA) containing the amorphous P(MTO) segment as a soft midblock and crystalline P(-LA) domain as hard end block behaved as an excellent thermoplastic elastomer (TPE) with high elongation at break (1438±204 %), tensile strength (23.5±1.7 MPa), and outstanding elastic recovery (>88 %).
对于先进材料应用而言，开发创新的合成策略来制备功能性聚己内酯的需求十分迫切。在本论文中，我们报道了一种简便的合成策略，用于制备一类由环氧化物衍生而来的基于己内酯的单体（R-TO）。它们可通过可控的开环聚合（ROP）轻松聚合，得到一系列高分子量（M高达350 kDa）的聚酯P（R-TO）。MTO与丙交酯（-LA）的顺序加成共聚可得到一系列具有组成依赖性机械性能的ABA三嵌段共聚物。值得注意的是，含有无定形P（MTO）链段作为软中间嵌段和结晶P（-LA）域作为硬端嵌段的P（-LA）-b-P（MTO）-b-P（-LA）表现为一种优异的热塑性弹性体（TPE），具有高断裂伸长率（1438±204％）、拉伸强度（23.5±1.7 MPa）和出色的弹性回复率（>88％）。
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