核壳粒子POE/HDPE增韧改性聚丙烯
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摘要
以聚丙烯(PP)、乙烯-1-辛烯共聚物(POE)、高密度聚乙烯(HDPE)为原料,通过熔融共混制备了具有核壳结构的PP/POE/HDPE合金。通过改变HDPE含量,研究了核壳结构对PP/POE/HDPE合金性能的影响。结果表明:当w(HDPE)大于15%时,PP/POE/HDPE合金中有明显的核壳结构,以HDPE为核,弹性体POE为壳,不仅能形成单核结构,还能形成多核结构;随着HDPE含量增加,PP的结晶度下降;当w(HDPE)为20%时,与纯PP相比,PP/POE/HDPE合金的冲击强度提高了139.5%,而拉伸强度和弹性模量基本不变。
Polypropylene(PP),ethylene-1-octylene polyolefin elastomer(POE) and high density polyethylene(HDPE) were used as raw materials to prepare PP/POE/HDPE alloy with core-shell structure via melt blending. The contribution of core-shell structure on the properties of the alloy was observed by changing the content of HDPE. The results show that PP/POE/HDPE alloy has the core-shell structure with single or multi core of HDPE and shell of POE when the mass fraction of HDPE is more than 15%. The crystallinity of PP decreases with the increasing content of HDPE. The impact strength of PP/POE/HDPE alloy is increased by 139.5% compared with that of pure PP,while the tensile strength and elastic modulus vary little when the mass fraction of HDPE reaches 20%.
Polypropylene(PP),ethylene-1-octylene polyolefin elastomer(POE) and high density polyethylene(HDPE) were used as raw materials to prepare PP/POE/HDPE alloy with core-shell structure via melt blending. The contribution of core-shell structure on the properties of the alloy was observed by changing the content of HDPE. The results show that PP/POE/HDPE alloy has the core-shell structure with single or multi core of HDPE and shell of POE when the mass fraction of HDPE is more than 15%. The crystallinity of PP decreases with the increasing content of HDPE. The impact strength of PP/POE/HDPE alloy is increased by 139.5% compared with that of pure PP,while the tensile strength and elastic modulus vary little when the mass fraction of HDPE reaches 20%.
引文
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[2]江梅,王清国,聂华.汽车塑料及其制品的发展[J].汽车工艺与材料,2005(4):37-41.
[3]李学峰.PP/EPDM/HDPE三元共混增韧及增韧机理分析[J].大连轻工业学院学报,1996,15(4):30-34.
[4]闫瑞萍,梁善杰.PP/HDPE/EPDM三元共混材料的微观形态结构及增韧机理分析[J].工程塑料应用,1994,22(3):31-34.
[5]邵禹通,谢晖,程思怡,等.抗冲聚丙烯基接枝共聚物的组成和相形态[J].合成树脂及塑料,2015,32(3):57-59.
[6]冯予星,刘力,张立群,等.PP/POE共混合金的研究[J].工程塑料应用,1997,27(12):6-9.
[7]祝景云,杜建强,赵和英.POE改性PP的性能研究[J].合成树脂及塑料,2007,24(1):14-17.
[8]陈延安,陈桂吉,孙刚.HDPE/POE协同增韧改性聚丙烯[J].上海塑料,2016(4):35-39.
[9]Mark J E.Polymer Date Handbook[M].New York:Oxford University Press,1999:772.