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七孔涤纶纤维对CPE-AO2246微观结构和性能的影响

, PP. 21-27

Keywords: 七孔中空涤纶纤维,复合材料,结晶-纤维网络结构,阻尼性能,吸声性能,力学性能

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Abstract:

利用氯化聚乙烯(CPE)、2,2-亚甲基-双(4-甲基-6-叔丁基苯酚)(AO2246)和三维卷曲七孔中空涤纶纤维(SHPF)制备了一系列的SHPF/CPE-AO2246三元复合材料。通过DMA、SEM、SW230吸声仪以及HD026NE电子织物强力仪等对复合材料的微观结构和性能进行了测试及分析。结果表明,加入的SHPF纤维充当了结晶诱导作用,在复合材料中产生了大量AO2246的包覆式结晶,从而加速了网络结构的形成;含有20%质量比(以CPE和AO2246总质量为基)纤维的SHPF/CPE-AO2246复合材料的最大储能模量是未加纤维的3倍多,由于复合材料的储能模量增幅较大而使其损耗因子下降较快,但材料损耗模量-温度曲线下的面积(LA)随纤维含量增加而增大,说明材料的阻尼耗能能力并未下降;SHPF纤维的加入使材料的力学性能获得了较大的改善,中空网络结构的形成赋予三元复合材料吸声性能。

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