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玄武岩短切纤维容易团聚,且不易在树脂基体中分散均匀,通过球磨法制得玄武岩短切纤维粉对PCDL进行改性,进一步提高玄武岩短切纤维(BF)在聚碳酸酯型聚氨酯(PCDL/TDI)中的分散性,并对其界面性能进行了考察,利用DMA表征了材料的阻尼性能、运用DSC分析了材料的玻璃化温度。结果表明,同样在PCDL/TDI基体树脂中加入质量分数0.5%的玄武岩短切纤维和球磨法纤维粉,球磨法纤维粉在树脂基体中分散更均匀,由其制得的复合材料较短切纤维制得的复合材料玻璃化温度提高了12.2℃,最大阻尼损耗因子tanδ_(max)提高了0.22。
The basalt chopped fibers are easily reunited and are not easily dispersed in the resin matrix. The basalt chopped fiber powder is ball-milled to modify the PCDL to further improve the shortening of the basalt fiber in the polycarbonate-based polyurethane (PCDL / TDI ). The interface properties were investigated. The damping properties of the materials were characterized by DMA. The glass transition temperature of the materials was analyzed by DSC. The results showed that the addition of 0.5% (mass fraction) basalt chopped fiber and ball milling fiber powder to PCDL / TDI matrix resin, the ball milling fiber powder dispersed more evenly in the resin matrix, the composite material prepared by the short cut fiber The glass transition temperature of the composites increased by 12.2 ℃, and the maximum damping loss factor tanδ max increased by 0.22.