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首页> 外文期刊>Journal of Applied Polymer Science >Chemorheology and ultimate behavior of epoxy-amine mixtures modified with a liquid oligomer
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Chemorheology and ultimate behavior of epoxy-amine mixtures modified with a liquid oligomer

机译：液体低聚物改性环氧胺混合物的化学流变学和极限行为

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Rubber toughening of epoxy resins has been actively studied since the 1960s with clear progress in understanding of the ultimate properties: microstructure relationships. The morphology, obtained after curing of the modified thermosetting matrix, is a function of the process conditions as well as of the materials used because both influence the thermodynamics and the kinetics of phase separation. In this work several amounts of poly(oxypropylentriamine) (POPTA), have been added as modifier to a diglycidyl ether of bisphenol-A (DGEBA)-based epoxy matrix cui ed with a cycloaliphatic amine. Molecular weight of the neat resin and amine/epoxy stoichiometric ratio have also been used as variables. This investigation has focused upon the importance of cure chemorheology for microstructure formation by using both physicochemical (isothermal and dynamic calorimetry) and rheological techniques. In the second part of this study, the influence of the molecular weight of the epoxy resin in the ultimate properties of 15 wt % POPTA-modified epoxy matrices is also analyzed. (C) 2000 John Wiley & Sons, Inc. [References: 52]
机译：自1960年代以来，一直对环氧树脂的橡胶增韧进行了积极的研究，在了解最终性能：微观结构关系方面取得了明显进展。在改性的热固性基质固化后获得的形态是工艺条件以及所用材料的函数，因为这两者都会影响相分离的热力学和动力学。在这项工作中，已将几种量的聚（氧丙基三胺）（POPTA）作为改性剂添加到双脂A（DGEBA）基环氧基胺与脂环族胺形成的二缩水甘油醚中。纯树脂的分子量和胺/环氧化学计量比也已用作变量。这项研究的重点是通过使用物理化学方法（等温和动态量热法）和流变技术，对微观结构的形成进行化学流变学研究。在本研究的第二部分中，还分析了环氧树脂的分子量对15 wt％POPTA改性的环氧基质的最终性能的影响。 （C）2000 John Wiley＆Sons，Inc. [参考：52]

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