通过反应诱导微相分离与三嵌段共聚物共混形成的柔性环氧树脂。

Flexible Epoxy Resin Formed Upon Blending with a Triblock Copolymer through Reaction-Induced Microphase Separation.

作者信息

Chu Wei-Cheng, Lin Wei-Sheng, Kuo Shiao-Wei

机构信息

Center for Nanoscience and Nanotechnology, Department of Materials and Optoelectronic Science, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.

出版信息

Materials (Basel). 2016 Jun 3;9(6):449. doi: 10.3390/ma9060449.

DOI:10.3390/ma9060449

PMID:28773571

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5456746/

Abstract

In this study, we used diglycidyl ether bisphenol A (DGEBA) as a matrix, the ABA block copolymer poly(ethylene oxide--propylene oxide--ethylene oxide) (Pluronic F127) as an additive, and diphenyl diaminosulfone (DDS) as a curing agent to prepare flexible epoxy resins through reaction-induced microphase separation (RIMPS). Fourier transform infrared spectroscopy confirmed the existence of hydrogen bonding between the poly(ethylene oxide) segment of F127 and the OH groups of the DGEBA resin. Small-angle X-ray scattering, atomic force microscopy, and transmission electron microscopy all revealed evidence for the microphase separation of F127 within the epoxy resin. Glass transition temperature () phenomena and mechanical properties (modulus) were determined through differential scanning calorimetry and dynamic mechanical analysis, respectively, of samples at various blend compositions. The modulus data provided evidence for the formation of wormlike micelle structures, through a RIMPS mechanism, in the flexible epoxy resin upon blending with the F127 triblock copolymer.

摘要

在本研究中，我们使用双酚A二缩水甘油醚（DGEBA）作为基体，ABA嵌段共聚物聚（环氧乙烷-环氧丙烷-环氧乙烷）（普朗尼克F127）作为添加剂，以及二苯二氨基砜（DDS）作为固化剂，通过反应诱导微相分离（RIMPS）制备柔性环氧树脂。傅里叶变换红外光谱证实了F127的聚环氧乙烷基段与DGEBA树脂的OH基团之间存在氢键。小角X射线散射、原子力显微镜和透射电子显微镜均揭示了环氧树脂中F127发生微相分离的证据。通过差示扫描量热法和动态力学分析分别测定了不同共混物组成样品的玻璃化转变温度（）现象和力学性能（模量）。模量数据为在与F127三嵌段共聚物共混时通过RIMPS机制在柔性环氧树脂中形成蠕虫状胶束结构提供了证据。