针对石英纤维增强聚芳基乙炔(PAA)树脂基复合材料固化微裂纹缺陷问题,采用差示扫描量热、红外光谱、顶杆示差、三点弯曲及金相分析等方法,通过PAA树脂的固化反应、收缩特性分析,研究了树脂浇注体力学性能、增强体结构形式、纤维体积分数对裂纹缺陷产生的影响.结果表明,PAA树脂固化收缩率大、树脂脆性是PAA复合材料中裂纹缺陷产生的主要原因,提高纤维含量、减少富树脂区有助于抑制裂纹缺陷,并且采用酚醛树脂对PAA进行改性后,亦可有效减少裂纹的产生.
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