不同固化温度对碳纤维/双马复合材料力学性能及耐热性能的影响

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Abstract：A T8OO carbon fiber/bismaleimide resin prepreg with athicknessof 0.1 mm was domesticall prepared employinghot-melt impregnating process，basedonwhichthe2mmthickunidirectional composites wererespectivelyobtained under the curing temperatures of 230 C and 280 C . The mechanical property and heat resistance of the materialswere studied.The results evidenced that the curing degree of the materials were over 93% under both curing temperatures，and the glass transition temperature of the composite cured under 280 C was 90‰ higher than that under 230‰ . In addition， the retention rates of bending strength and interlayer shear strength were both higher than 65% at the temperature of ， exhibiting excellent high-temperature mechanical behavior of the composites.

Keywords：bismaleimide resin；curing temperature；heat resistance；composites；mechanical behavior

1引言

双马来酰亚胺（BMI）树脂固化物具有很好的耐热性，其聚合物的初始分解温度一般在 300% 以上，快速分解温度一般比初始分解温度高 200qC 左右，含有酰胺键BMI树脂的快速分解温度也比初始热分解温度高 150qC 以上，可见其耐热性相当高。（剩余6671字）