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Lanthanide triflates as curing initiators for solid DGEBA resin: Thermal and mechanical characterization

机译:镧系三氟甲磺酸酯作为固体DGEBA树脂的固化引发剂:热和机械特性

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摘要

A new class of cationic initiators, lanthanide triflates, has been studied in the curing of diglycidyl ether of bisphenol-A (DGEBA). Two metal salts (Erbium and Ytterbium (111) trifluoromethanesulfonate) in various proportions (0.5, 1, and 2 parts per hundred of resin) have been used and the thermal and mechanical properties of the thermosets compared to a common solid epoxy system (crosslinked with o-tolylbiguanide). The kinetics of these processes has been evaluated by the isoconversional method that has been proved to be an excellent tool to predict the principal curing parameters (conversion/time/ temperature). Their mechanical properties have been evaluated by dynamic mechanical thermal analysis (DMTA), stress-strain curves, impact resistances and adhesion to metallic substrates, and the thermal characteristics were measured by calorimetry (DSC) and thermogravimetry (TGA). (C) 2007 Wiley Periodicals, Inc.
机译:在固化双酚A二缩水甘油醚(DGEBA)中,已经研究了一类新型的阳离子引发剂镧系三氟甲磺酸。已使用两种比例(分别为每100树脂0.5、1和2份)的两种金属盐(三氟甲烷磺酸ulf和((111)三氟甲磺酸盐),并且热固性塑料的热性能和机械性能与常见的固体环氧体系(与邻甲苯基双胍)。这些过程的动力学已通过等转化方法进行了评估,该方法已被证明是预测主要固化参数(转化/时间/温度)的极佳工具。通过动态机械热分析(DMTA),应力-应变曲线,耐冲击性和对金属基材的粘附力评估了它们的机械性能,并通过量热法(DSC)和热重法(TGA)测量了热特性。 (C)2007 Wiley期刊公司

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