STUDY ON THE MECHANICAL PROPERTIES OF PROPYLENE-ETHYLENE COPOLYMER/ETHYLENE-1-OCTENE COPOLYMER STRATIFIED COMPOSITES
STUDY ON THE MECHANICAL PROPERTIES OF PROPYLENE-ETHYLENE COPOLYMER/ETHYLENE-1-OCTENE COPOLYMER STRATIFIED COMPOSITES
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丙烯-乙烯共聚物/乙烯-1-辛烯共聚物层状复合材料力学性能研究
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Guo Shaoyun
中科院分区：
文献类型：
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作者：
Du Qin;Li Jiang;Shen Jiabin;Wang Ming;Chen Guangshun;Xu Shuangxi;Guo Shaoyun
设计了一套微层共挤系统，制备了2层、16层、32层和64层的复合材料，并采用常规共混工艺制备了共混材料，研究了相形态对共混物性能的影响。SEM显微照片显示，倍增元素起着分层和倍增的作用。为了研究分层共混样品的力学性能，引入等效箱模型，并进行了相应的拉伸试验，结果表明，在POE体积分数（VPOE）相同的情况下，层状复合材料，尤其是多层复合材料，具有较高的屈服强度和相当的断裂伸长率，根据应力-应变曲线，结果表明，当V_（POE）接近50%时，64层试样的屈服现象比共混物明显，共混物几乎没有屈服峰;通过研究层数对拉伸性能的影响，发现当V_（POE）不太大时，多层材料在力学性能方面的这些独特特性，为制备高性能复合材料提供了一条新的途径。
A set of microlayer coextrusion system was designed to prepare 2-layer,16-layer,32-layer and 64-layer composites.The blended materials were also prepared by conventional blending technology to study the effects of phase morphologies on properties of blends.The SEM micrographs showed that the multiplying elements acted as the function of delamination and multiplication.For investigating the mechanical properties of stratified and blended samples,an equivalent box model was introduced,and a series of corresponding tensile tests were performed.Both the theoretical and experimental results showed that with the same volume fraction of POE(V_(POE)),the stratified composites,especially multilayer samples,had higher yield strength and a comparable elongation at break comparing with those of the blends.According to stress-strain curves,it was illustrated that the yield phenomena behaved more evidently for 64-layer samples than for blends,which almost had no yield peak,when V_(POE) approached to 50%.By studying the effect of layer numbers on tensile properties,it was found that when V_(POE) was not too great,the yield strength was even larger than theoretical values acquired by an additive principle.Those distinct characteristics of multilayer materials in the aspect of mechanical properties might provide a novel approach to produce high-performance composites.