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含活性基团热塑性树脂合成及对双马树脂固化特性影响 被引量:2

Synthesis of a thermoplastic resin containing reactive groups and its effect on the curing properties of bismaleimide resin
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摘要 制备并研究了一种含烯丙基活性基团的聚芳醚酮对双马树脂6421固化特性的影响。结果表明掺杂这种含活性基团树脂可以消除6421树脂固化后的表面结皮现象,并使体系维持在低黏度段的时间大幅度增加。非等温DSC测试表明这种热塑性树脂改变了6421树脂固化进程,固化放热峰温度较6421树脂下降,活化能提高,反应级数增加,并且反应速率常数随温度敏感性提高,较低温下反应速率大大低于6421树脂而后固化温度下则高于。固化动力学的改变导致了结皮现象消除和低黏度段的时间大幅度增加。作为对比,具有类似结构的不含活性基团的聚芳醚酮则完全不能抑制双马树脂结皮现象,且固化放热峰值温度较6421树脂上升。微观结构研究表明掺杂体系随掺杂浓度增加可形成海岛和双连续相结构,且双连续相具有更复杂的双重结构。 A polyaryletherketone containing reactive allyl groups was synthesized and its effect on the curing properties of bismaleimide resin 6421was studied.The results show that doped with the thermoplastic containing reactive groups can prevent the serious surface skin during the curing process and the doped resin can maintained at a lower viscosity for a longer time.Non-isothermal DSC tests showed that the curing process bismaleimide resin was changed.The exothermic peak temperature was decreased.The apparent activation energy was increased from 71.36to 104.2kJ/mol.The reaction order was increased from 0.89to 0.923.The doped resin had a lower reaction rate constant at 150~196℃ while had a higher reaction rate constant at post cure temperature.The change of curing kinetics resulted in avoiding of surface skinning and a longer low viscosity time. As comparison,a polyaryletherketone of similar structure without reactive groups was completely unable to prevent the skin formation of 6421resin and the DSC exothermic peak temperature was higher than 6421resin.The microstructure of the fracture surfaces was studied.A much complex bi-continuous phase structure was found.
作者 郭妙才 GUO Miaocai;National Key Laboratory of Advanced Composites,AVIC Composites Company Ltd./ Beijing Institute of Aeronautical Materials;
出处 《复合材料学报》 EI CAS CSCD 北大核心 2013年第S1期19-25,共7页 Acta Materiae Compositae Sinica
基金 北京航空材料研究院益材基金 总装备部预研基金 国家自然科学基金
关键词 热塑性树脂 活性基团 双马树脂 固化 结皮 热差分析 thermoplastic reactive group bismaleimide resin curing surface skinning DSC
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参考文献5

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