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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。
A series of copolymers of CPE, 2,2-methylene-bis-4-methyl-6-tert-butylphenol (AO2246) and three- SHPF / CPE-AO2246 ternary composite material. The microstructure and properties of the composites were tested and analyzed by using DMA, SEM, SW230 sound absorption instrument and HD026NE electronic fabric strength tester. The results show that the SHPF fibers added act as a crystallization inducer, and a large amount of AO2246 crystal is formed in the composite, which accelerates the formation of network structure. With 20% mass ratio (based on the total mass of CPE and AO2246) The maximum storage modulus of SHPF / CPE-AO2246 composites is more than 3 times of that of unbonded fibers, and the loss factor decreases rapidly due to the large increase of storage modulus of composites. However, The area under the temperature curve (LA) increases with the increase of the fiber content, indicating that the energy dissipation capacity of the material does not decrease. The addition of SHPF fiber has greatly improved the mechanical properties of the material, and the formation of hollow network structure gives three Element composite sound absorption performance.