七孔涤纶纤维对CPE-AO2246微观结构和性能的影响

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。

Effect of seven-hole hollow polyester fibers on microstructure and properties of CPE-AO2246

A series of SHPF/CPE-AO2246 ternary composites were prepared by using chlorinated polyethylene (CPE), 2, 2'-methylene-bis-(4-methyl-6-tert-butyl-phenol) (AO2246) and seven-hole hollow polyester fibers with 3D crimp(SHPF). The properties and microstructure of the composites were measured and analysed by means of dynamic mechanical analysis, SEM, SW230 absorption instrument and HD026NE electronic fabric tensile tester. The results show that a large number of AO2246 crystals coated on the fiber surface are formed as a result of crystallization induction of SHPF, accelerating the formation of network structure consisting of fiber and AO2246 crystals. The maximum modulus of SHPF/CPE-AO2246 composite with 20% mass ratio (based on the total mass of CPE and AO2246) of SHPF is 3 times as much as that of CPE-AO2246 without SHPF, and the loss factor of the composite decreases sharply due to larger increase of storage modulus of the composite. The area under the curves of loss modulus vs temperature, however, increases with increasing fiber content. This indicates that capability of energy consumption doesn't decline. The mechanical properties of composites obtain great improvement by adding SHPF and the formation of network structure with hollow structure gives ternary composites sound absorption property.