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采用两种不同类型的乙烯-辛烯共聚物POE(POE1、POE2)与聚丙烯PP(PP1、PP2)分别进行共混改性,并对共混物的形态结构以及渗流阈值进行分析。结果表明:随着POE用量的增加,共混物相形态发生由“海-岛”结构向“海-海”结构转化;PP1/POE2和PP2/POE1两个共混体系均符合逾渗机理,PP1/POE2的临界基体层厚度d_c=0.486μm,PP2/POE1的临界基体层厚度d_c=0.447μm,POE2用量为30%时发生相反转,形成了大小不一的逾渗集团;当POE2用量为40%或50%时,相转变现象非常明显;而在PP2/POE1共混物中,当POE1用量为50%时,共混物才出现较为明显的相反转,形成“双连续相”结构。
Two different types of ethylene-octene copolymer POE (POE1, POE2) and polypropylene PP (PP1, PP2) were blended and modified respectively. The morphology and percolation threshold of the blends were also analyzed. The results showed that with the increase of POE content, the phase morphology of the blends transformed from “sea-island” structure to “sea-sea” structure. Both blends of PP1 / POE2 and PP2 / The percolation mechanism, PP1 / POE2 critical basement layer thickness d_c = 0.486μm, PP2 / POE1 critical base layer thickness d_c = 0.447μm, POE2 amount of 30% phase inversion occurs, the formation of different sizes of percolation groups; When the amount of POE2 is 40% or 50%, the phase transition phenomenon is very obvious. In the PP2 / POE1 blends, when the amount of POE1 was 50%, the blends appeared more obvious phase reversal, forming “double Continuous phase ”structure.