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首页> 外文期刊>Journal of Applied Polymer Science >DSC study on simultaneous interpenetrating polymer network formation of epoxy resin and unsaturated polyester
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DSC study on simultaneous interpenetrating polymer network formation of epoxy resin and unsaturated polyester

机译：DSC研究环氧树脂和不饱和聚酯同时互穿的聚合物网络形成

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A kinetic study on simultaneous interpenetrating polymer network formation of epoxy resin based on diglycidyl ether of Bisphenol A (DGEBA) and unsaturated polyester (UP) was performed by means of differential scanning calorimetry (DSC). Isothermal DSC characterizations of neat resins and their mixture (in a weight ratio of 50/50) were performed at different temperatures. Dynamic DSC characterization of the systems were performed at three different heating rates. A lower total heat of reaction developed during simultaneous polymerization in dynamic DSC tests was found, compared to the total heats developed during pure resins network formation. This phenomenon can be interpreted as an effect of network interlock that could not be compensated for completely by an increase in curing temperature. The kinetics of the reactions was described by empirical models. The DGEBA, in a 50/50 UP/DGEBA blend, indicated a higher rate constant than the pure DGEBA. The obtained results suggests that the hydroxyl end group of UP in the blend provided a favorably catalytic environment for the DGEBA cure. The results are in good agreement with the literature data. (C) 2002 John Wiley Sons, Inc. [References: 22]
机译：通过差示扫描量热法（DSC）进行了基于双酚A的二缩水甘油醚（DGEBA）和不饱和聚酯（UP）的同时互穿的聚合物网络形成的动力学研究。在不同温度下对纯树脂及其混合物（重量比为50/50）进行等温DSC表征。在三种不同的加热速率下对系统进行动态DSC表征。与在纯树脂网络形成过程中产生的总热量相比，动态DSC测试中同时聚合过程中产生的反应总热量更低。这种现象可以解释为网络互锁的影响，而固化温度的升高无法完全弥补这种影响。反应的动力学由经验模型描述。 DGEBA在50/50 UP / DGEBA混合物中的速率常数高于纯DGEBA。所得结果表明，共混物中UP的羟基端基为DGEBA固化提供了有利的催化环境。结果与文献数据吻合良好。 （C）2002 John Wiley Sons，Inc. [参考：22]

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