聚(ε-己内酯-co-1,2-丙二醇草酸酯)的合成及其性能

Synthesis and Properties of Poly(ε-caprolactone-co-1, 2-propanediol oxalate)

摘要

以环状1,2-丙二醇草酸酯(1,2-POx)为改性单体，与ε-己内酯(CL)进行本体开环共聚，制备了一系列聚(ε-己内酯-co-1,2-丙二醇草酸酯)(P(CL-co-POx))。系统考察了P(CL-co-POx)的聚合条件、理化性能、力学性能及降解性能。结果表明，P(CL-co-POx)的单体转化率超过94%，数均分子量(M_n)可达131.5×10³，结晶度为39.0%，兼具良好的力学性能(拉伸强度26.9 MPa、断裂伸长率1 928%)与可控的降解性能(降解28 d后失重率达66%)。本研究为设计兼具优异力学性能与可控降解性能的脂肪族聚酯提供了有效途径。

Abstract

A series of poly(ε-caprolactone-co-1,2-propylene glycol oxalate) (P(CL-co-POx)) copolymers were synthesized via bulk ring-opening copolymerization of ε-caprolactone (CL) with cyclic 1,2-propylene glycol oxalate (1,2-POx) as a modifying monomer. The polymerization behavior, physicochemical properties, mechanical properties, and degradation performance of P(CL-co-POx) were systematically investigated. Results demonstrated that the monomer conversion exceeded 94%, the number-average molecular weight (M _n) reached up to 131.5×10³, and the crystallinity was determined to be 39.0%. The copolymer exhibited favorable mechanical properties with a tensile strength of 26.9 MPa and an elongation at break of 1 928%, as well as excellent degradability, showing a mass loss of 66% after 28 d of degradation. This strategy provides an effective route for designing aliphatic polyesters with superior mechanical performance and tunable degradability.

关键词

可降解聚合物 / 共聚酯 / ε-己内酯 / 环状1,2-丙二醇草酸酯 / 开环聚合

Key words

degradable polymer / copolyester / ε-caprolactone / cyclic 1,2-propylene glycol oxalate / ring-opening copolymerization

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基金资助

国家自然科学基金(U24A20558)

国家自然科学基金(22031005)