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首页> 外文期刊>Journal of Polymer Science, Part A. Polymer Chemistry >Degradable and chemically recyclable epoxy resins containing acetal linkages: Synthesis, properties, and application for carbon fiber-reinforced plastics
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Degradable and chemically recyclable epoxy resins containing acetal linkages: Synthesis, properties, and application for carbon fiber-reinforced plastics

机译：含缩醛键的可降解和化学可循环利用的环氧树脂：碳纤维增强塑料的合成，性能和应用

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摘要

Four sorts of epoxy resins containing degradable acetal linkages were synthesized by the reaction of bisphenol A (BA) or cresol novolak (CN) resin with vinyl ethers containing a glycidyl group [4-vinlyoxybutyl glycidyl ether (VBGE) and cyclohexane dimethanol vinyl glycidyl ether (CHDMVG)] and cured with known typical amine-curing agents. The thermal and mechanical properties of the cured resins were investigated. Among the four cured epoxy resins, the CN-CHDMVG resin (derived from CN and CHDMVE) exhibited relatively high glass transition temperature (T _g = ca. 110 °C). The treatment of these cured epoxy resins with aqueous HCl in tetrahydrofuran (THF) at room temperature for 12 h generated BA and CN as degradation main products in high yield. Carbon fiber-reinforced plastics (CFRPs) were prepared by heating the laminated prepreg sheets with BA-CHDMVG (derived from BA and CHDMVE) and CN-CHDMVG, in which strands of carbon fibers are impregnated with the epoxy resins containing conventional curing agents and curing accelerators. The obtained CFRPs showed good appearance and underwent smooth breakdown with the aqueous acid treatment in THF at room temperature for 24 h to produce strands of carbon fiber without damaging their surface conditions and tensile strength.
机译：通过双酚A（BA）或甲酚酚醛清漆（CN）树脂与含有缩水甘油基的乙烯基醚[4-乙烯基氧基丁基缩水甘油醚（VBGE）和环己烷二甲醇乙烯基缩水甘油醚（ CHDMVG）]，并用已知的典型胺固化剂进行固化。研究了固化树脂的热和机械性能。在四种固化环氧树脂中，CN-CHDMVG树脂（源自CN和CHDMVE）显示出较高的玻璃化转变温度（T _g =约110℃）。在室温下用盐酸水溶液在四氢呋喃（THF）中处理这些固化的环氧树脂12 h，可以高产率生成BA和CN作为降解的主要产物。碳纤维增强塑料（CFRP）是通过将层压的预浸料片与BA-CHDMVG（衍生自BA和CHDMVE）和CN-CHDMVG一起加热而制备的，其中，碳纤维束被含常规固化剂的环氧树脂浸渍并固化加速器。所得的CFRP表现出良好的外观，并在室温下在THF中进行了酸水溶液处理24小时后进行了平滑击穿，从而在不损害其表面条件和拉伸强度的情况下生产了碳纤维束。

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