Synthesis of a Degradable High-Performance Epoxy-Ended Hyperbranched Polyester
作者： Qian Yu , Yeyun Liang , Juan Cheng , Sufang Chen , Aiqing Zhang
关键词: Thermosetting polymer 、 Epoxy 、 Maleic anhydride 、 Epichlorohydrin 、 Diglycidyl ether 、 Degradation (geology) 、 Flexural strength 、 Ultimate tensile strength 、 Composite material 、 Materials science
摘要: Degradation and recycling of cured thermosetting epoxy resins are major challenges to the industry. Here, a low-viscosity, degradable epoxy-ended hyperbranched polyester (DEHP) is synthesized by reaction between epichlorohydrin carboxyl-ended (DCHP) obtained from an esterification citric acid maleic anhydride. The chemical structures DCHP DEHP were characterized Fourier transform infrared 1H NMR. has positive effect on reinforcing toughening diglycidyl ether bisphenol-A (DGEBA). With increase in content molecular weight DEHP, mechanical performances DEHP/DGEBA composites, including tensile, flexural, impact strengths, first then decrease. improvements strengths 34.2–43.4%, 35.6–48.1%, 117.9–137.8%, respectively. Moreover, also promotes degradation composites. degree cur...
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