采用原位乳液共聚合接枝方法改进玻璃纤维(GF)与苯乙烯-丙烯腈共聚物(SAN)之间的界面粘接性能.先用硅烷偶联剂预处理GF,以苯乙烯(St)、丙烯腈(AN)为单体,制备了不同GF/单体质量比的接枝SAN的玻璃纤维(GF-g-SAN),再与SAN树脂共混,制备了不同GF-g-SAN含量的GF-g-SAN/SAN复合材料.采用SEM研究了冲击断面的形态,测试了GF-g-SAN/SAN的冲击强度和动态力学性能,并采用COX模型进行力学模型分析.冲击性能测试、SEM形貌分析和DMA表征均说明改性后的玻纤同SAN之间具有良好的界面粘合力;GF/St质量比为1:1时,短GF在低含量范围内、长玻纤在较高含量时能有效改善SAN的刚性和韧性;采用COX模型计算的结果与实验数据接近.
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