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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。
The effect of poly (aryl ether ketone) containing allyl reactive groups on the curing properties of bismaleimide resin 6421 was studied. The results show that doping with such reactive group resin can eliminate the phenomenon of surface skin after 6421 resin solidification and prolong the system time in low viscosity. The non-isothermal DSC test showed that the thermoplastic resin changed the curing process of 6421 resin, the curing exothermic peak temperature was lower than that of 6421 resin, the activation energy was increased, the reaction order was increased, and the reaction rate constant increased with the temperature sensitivity. The reaction rate at lower temperature Much lower than 6421 resin and then higher than at curing temperature. Changes in curing kinetics lead to a significant increase in the elimination of crusting and in the low viscosity section. In contrast, polyaryletherketones with similar structure and without active groups can not inhibit the phenomenon of bismaleimide resin crust at all, and the peak temperature of curing exotherm is higher than that of 6421 resin. Microstructure studies show that the doping system can form island and bicontinuous phase structure with the increase of doping concentration, and the bicontinuous phase has a more complex dual structure.