综合考虑耐热性、流变性能、开放期以及树脂固化后的玻璃化转变温度等因素,对PETI聚酰亚胺树脂进行优化.研究分子量对优化体系的影响.结果表明:以苯乙炔苯酐(4-PEPA)为封端基,选择非对称的二酐(a-BPDA),引入3,4'-二苯醚二胺(3,4'-ODA)和4,4'-二苯醚二胺(4,4'-ODA)等比例合成出低粘度的树脂,当分子量为750g/mol时,该PE-TI聚酰亚胺树脂能满足RTM工艺要求,能够实现高温复合材料的低成本制造.
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