Two-way Shape Memory Effect of Polycaprolactone-based Polyurethane via Synergistic Role of Hydrogen Bonding and Crystallization Tuned by Malic Acid

IF 4.6 2区化学 Q2 POLYMER SCIENCE

Chinese Journal of Polymer Science Pub Date : 2026-06-11 DOI:10.1007/s10118-026-3686-6

Xue-Qing Li, Shuai Lu, Jun-Jie Tan, Bo Lv, Hong-Ye Yan, Yan Tang, Yu Zhou, Yang Zhou, Hong-Xiang Chen

{"title":"Two-way Shape Memory Effect of Polycaprolactone-based Polyurethane via Synergistic Role of Hydrogen Bonding and Crystallization Tuned by Malic Acid","authors":"Xue-Qing Li, Shuai Lu, Jun-Jie Tan, Bo Lv, Hong-Ye Yan, Yan Tang, Yu Zhou, Yang Zhou, Hong-Xiang Chen","doi":"10.1007/s10118-026-3686-6","DOIUrl":null,"url":null,"abstract":"<div><p>Semi-crystalline polymers can obtain a broad melting transition by copolymerization or blending and show a two-way shape memory effect (2W-SME) under stress-free conditions. However, intricate interactions between polymers are not easily controlled. It is still challenging for semi-crystalline polymers to obtain a two-way shape memory effect by broadening the melting transition. Here, we prepared polycaprolactone (PCL)-based cross-linked polyurethane by using malic acid as a side chain, thereby exploring the relationship between malic acid and the crystallinity of PCL or 2W-SME. The results showed that the incorporation of malic acid broadened the melting transition and improved the two-way shape memory behavior of the PCL-based cross-linked polyurethane. The influence of malic acid on the dynamic response mechanism of polyurethane was studied using <i>in situ</i> polarized optical microscopy (POM), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) spectroscopy. The investigation revealed that the malic acid side chain plays a dual role by adjusting the crystallization behavior and strengthening the hydrogen-bonding network in the two-way shape memory process. This work provides a versatile strategy for the structural design of two-way shape memory polymers.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"44 9","pages":"3042 - 3052"},"PeriodicalIF":4.6000,"publicationDate":"2026-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chinese Journal of Polymer Science","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10118-026-3686-6","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}

引用次数: 0

Abstract

Semi-crystalline polymers can obtain a broad melting transition by copolymerization or blending and show a two-way shape memory effect (2W-SME) under stress-free conditions. However, intricate interactions between polymers are not easily controlled. It is still challenging for semi-crystalline polymers to obtain a two-way shape memory effect by broadening the melting transition. Here, we prepared polycaprolactone (PCL)-based cross-linked polyurethane by using malic acid as a side chain, thereby exploring the relationship between malic acid and the crystallinity of PCL or 2W-SME. The results showed that the incorporation of malic acid broadened the melting transition and improved the two-way shape memory behavior of the PCL-based cross-linked polyurethane. The influence of malic acid on the dynamic response mechanism of polyurethane was studied using in situ polarized optical microscopy (POM), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) spectroscopy. The investigation revealed that the malic acid side chain plays a dual role by adjusting the crystallization behavior and strengthening the hydrogen-bonding network in the two-way shape memory process. This work provides a versatile strategy for the structural design of two-way shape memory polymers.

查看原文本刊更多论文

苹果酸调晶与氢键协同作用对聚己内酯基聚氨酯双向形状记忆的影响

半结晶聚合物可以通过共聚或共混获得广泛的熔融转变，并在无应力条件下表现出双向形状记忆效应（2W-SME）。然而，聚合物之间复杂的相互作用并不容易控制。对于半晶聚合物来说，通过扩大熔融转变来获得双向形状记忆效应仍然是一个挑战。本研究以苹果酸为侧链制备聚己内酯（PCL）基交联聚氨酯，探讨苹果酸与PCL或2W-SME结晶度的关系。结果表明，苹果酸的加入拓宽了聚氯乙烯基交联聚氨酯的熔融转变，改善了其双向形状记忆行为。采用原位偏光显微镜（POM）、x射线衍射仪（XRD）和傅里叶红外光谱（FTIR）研究了苹果酸对聚氨酯动态响应机理的影响。研究表明，苹果酸侧链在双向形状记忆过程中起着调节结晶行为和强化氢键网络的双重作用。这项工作为双向形状记忆聚合物的结构设计提供了一种通用的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.