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化工学报  2015 

二元胺型苯并噁嗪/双马来酰亚胺共混树脂及其玻璃布增强的层压板

DOI: 10.11949/j.issn.0438-1157.20150385, PP. 4288-4294

Keywords: 苯并噁嗪,双马来酰亚胺,固化树脂,复合材料,热性能,力学性能

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Abstract:

苯并噁嗪(BZ)和双马来酰亚胺(BMI)按照不同的配比进行共混固化。用FTIR、DSC、凝胶化时间、DMA、TGA、万能电子拉力机分别研究了BZ/BMI共混体系的固化行为以及BZ/BMI固化树脂的热性能和剪切强度等。结果表明BZ和BMI除了发生均聚反应,还发生苯并噁嗪开环生成的酚羟基和双马来酰亚胺的双键生成醚键的反应。BZ和BMI共混后,固化温度比各自的固化温度都低。BMI的加入提高了共混树脂的热性能,BZ/BMI固化树脂的Tg达289℃,Td5达387℃,Td10达422℃,800℃的残炭率达55.3%。另外,BMI的加入提高了BZ/BMI固化树脂的剪切强度,当BMI的含量为60%时,BZ/BMI固化树脂的剪切强度为12.44MPa。进一步,制备了玻璃布增强的BZ/BMI层压板,并对其力学性能和断面形貌进行了研究。结果表明,当BMI用量为40%时,BZ/BMI层压板的拉伸强度、弯曲强度、冲击强度分别达394MPa、490MPa、160kJ·m-2。

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