Scholarlink

<p>Two-way shape memory polymers (2W-SMPs), which can transition between two distinct temporary shapes, have garnered significant attention from researchers. This study successfully developed thermadapt 2W-SMPs using syndiotactic 1,2-polybutadiene (SPB) by leveraging dynamic covalent crosslinking techniques. Initially, m-chloroperbenzoic acid (m-CPBA) was employed for the epoxidation of SPB. Cysteine (Cys) was subsequently introduced to form a dynamic covalent bond of <i>β</i>-hydroxy ester via the reaction between the epoxy groups on SPB and the carboxyl groups of Cys. The sulfhydryl groups of Cys can undergo oxidative coupling to form disulfide bonds, thereby establishing two distinct types of dynamic covalent bonds within the material and lowering its topological rearrangement temperature. Through the exchange reactions of these dynamic covalent bonds at elevated temperatures, the resulting material exhibits enhanced mechanical properties and can be reshaped in the solid state. This work provides a viable method for preparing recyclable thermally adaptive 2W-SMPs under stress-free conditions, thereby enriching the research landscape in the field of shape memory materials.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Dynamic covalent networks enable thermadapt two-way shape memory behavior in syndiotactic 1,2-polybutadiene-based recyclable polymers

  • 期刊论文

  • 发表日期：

    2025年7月12日

查看全文
  • Bingshen Chen,
  • Biao Xia,
  • Shijie Liao,
  • Daiwei Zeng,
  • Tengfei Lin,
  • Na Wen,
  • Min Gao,
  • Chunlin Zhao,
  • Xiao Wu,
  • Cong Lin,
  • Xiaochun Zheng,
  • Fei Gao

摘要

Two-way shape memory polymers (2W-SMPs), which can transition between two distinct temporary shapes, have garnered significant attention from researchers. This study successfully developed thermadapt 2W-SMPs using syndiotactic 1,2-polybutadiene (SPB) by leveraging dynamic covalent crosslinking techniques. Initially, m-chloroperbenzoic acid (m-CPBA) was employed for the epoxidation of SPB. Cysteine (Cys) was subsequently introduced to form a dynamic covalent bond of β-hydroxy ester via the reaction between the epoxy groups on SPB and the carboxyl groups of Cys. The sulfhydryl groups of Cys can undergo oxidative coupling to form disulfide bonds, thereby establishing two distinct types of dynamic covalent bonds within the material and lowering its topological rearrangement temperature. Through the exchange reactions of these dynamic covalent bonds at elevated temperatures, the resulting material exhibits enhanced mechanical properties and can be reshaped in the solid state. This work provides a viable method for preparing recyclable thermally adaptive 2W-SMPs under stress-free conditions, thereby enriching the research landscape in the field of shape memory materials.