Tunable Thermo-Responsive Shape Memory Materials Enabled by Poly(ε-caprolactone)-Poly(2-vinyl)ethylene Glycol Copolymers via Facile Thiol-Ene Photo-Crosslink

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Chinese Journal of Polymer Science Pub Date : 2025-01-18 DOI:10.1007/s10118-025-3255-4

Ming-Hang Wang, Fan Yang, Yong-Jian Zhang

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引用次数: 0

Abstract

Control crosslink network and chain connectivity are essential to develop shape memory polymers (SMPs) with high shape memory capabilities, adjustable response temperature, and satisfying mechanistical properties. In this study, novel poly(ε-caprolactone) (PCL)-poly(2-vinyl)ethylene glycol (PVEG) copolymers bearing multi-pendant vinyl groups is synthesized by branched-selective allylic etherification polymerization of vinylethylene carbonate (VEC) with linear and tetra-arm PCLs under a synergistic catalysis of palladium complex and boron reagent. Facile thiol-ene photo-click reaction of PCL-PVEG copolymers with multifunctional thiols can rapidly access a serious crosslinked SMPs with high shape memory performance. The thermal properties, mechanical properties and response temperature of the obtained SMPs are tunable by the variation of PCL prepolymers, vinyl contents and functionality of thiols. Moreover, high elastic modulus in the rubbery plateau region can be maintained effectively owing to high-density topological networks of the PCL materials. In addition, the utility of the present SMPs is further demonstrated by the post-functionalization via thiol-ene photo-click chemistry.

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聚（ε-己内酯）-聚（2-乙烯基）乙二醇共聚物通过易变巯基光交联实现可调热响应形状记忆材料

控制交联网络和链连通性是开发具有高形状记忆能力、可调响应温度和令人满意的力学性能的形状记忆聚合物（SMPs）的关键。在钯配合物和硼试剂的协同催化下，以乙烯碳酸乙烯（VEC）为原料，采用支链选择性烯丙基醚化聚合，合成了含多悬垂乙烯基的聚ε-己内酯(PCL)-聚2-乙烯基乙二醇（PVEG）共聚物。聚氯乙烯- pveg共聚物与多功能硫醇的光点击反应可以快速获得具有高形状记忆性能的严重交联smp。制备的SMPs的热性能、力学性能和响应温度可通过PCL预聚物、乙烯基含量和硫醇官能团的变化来调节。此外，由于PCL材料的高密度拓扑网络，可以有效地保持橡胶高原区域的高弹性模量。此外，通过巯基光点击化学的后功能化进一步证明了现有SMPs的实用性。

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来源期刊

Chinese Journal of Polymer Science 化学-高分子科学

CiteScore

7.10

自引率

11.60%

发文量

218

审稿时长

6.0 months

期刊介绍： Chinese Journal of Polymer Science (CJPS) is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry, Chinese Academy of Sciences. CJPS is edited by a distinguished Editorial Board headed by Professor Qi-Feng Zhou and supported by an International Advisory Board in which many famous active polymer scientists all over the world are included. The journal was first published in 1983 under the title Polymer Communications and has the current name since 1985. CJPS is a peer-reviewed journal dedicated to the timely publication of original research ideas and results in the field of polymer science. The issues may carry regular papers, rapid communications and notes as well as feature articles. As a leading polymer journal in China published in English, CJPS reflects the new achievements obtained in various laboratories of China, CJPS also includes papers submitted by scientists of different countries and regions outside of China, reflecting the international nature of the journal.