PP/POE微发泡材料的制备和性能
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摘要
以高熔体强度聚丙烯(PP)和乙烯–辛烯共聚物(POE)为主要原料,利用化学发泡法制备了PP/POE微发泡材料。研究了POE用量对PP/POE微发泡材料发泡性能、力学性能的影响;通过研究PP/POE微发泡材料的动态力学性能、结晶行为、泡孔结构,确定了POE的最佳用量。添加POE能改善微发泡材料的动态力学性能,同时将PP的结晶峰温度提升117.01℃,加快了PP的结晶过程,为PP发泡提供合适的内部条件,有效地减少了发泡时过发泡、并泡现象的产生。当POE质量分数为10%时,PP/POE微发泡材料的综合性能达到最优,其缺口冲击强度达到13.2kJ/m2,相比未添加POE的微发泡材料提升了约158.8%,泡孔平均直径减小到60μm左右,泡孔密度达到最大值,为1.19×106个/cm3。
Polypropylene(PP)/ethylene-octene copolymer(POE) micro-foamed materials were prepared by using high melt strength PP and POE as base resin by chemical foaming. The effects of POE content on the foaming properties and mechanical properties of the micro-foamed materials were investigated. The optimum addition amount of POE was determined by studying the dynamic mechanical properties,the crystallization behavior and the cell structure of the micro-foamed materials. The addition of POE can improve the dynamic mechanical properties of the materials and the crystallization peak temperature of PP is increased to117.01℃,which accelerates the crystallization process of PP. Therefore,it provides suitable internal conditions for PP foaming,effectively reduces the occurrence of over-foaming and cell merger during foaming. When the mass fraction of POE is 10%,the comprehensive performance of the material is best,and the notch impact strength reaches 13.2 kJ/m2,which is 158.8% higher than that of the foamed material without POE. The cell average diameter is reduced to about 60 μm,and the cell density reaches a maximum of 1.19×106 cell/cm3.
Polypropylene(PP)/ethylene-octene copolymer(POE) micro-foamed materials were prepared by using high melt strength PP and POE as base resin by chemical foaming. The effects of POE content on the foaming properties and mechanical properties of the micro-foamed materials were investigated. The optimum addition amount of POE was determined by studying the dynamic mechanical properties,the crystallization behavior and the cell structure of the micro-foamed materials. The addition of POE can improve the dynamic mechanical properties of the materials and the crystallization peak temperature of PP is increased to117.01℃,which accelerates the crystallization process of PP. Therefore,it provides suitable internal conditions for PP foaming,effectively reduces the occurrence of over-foaming and cell merger during foaming. When the mass fraction of POE is 10%,the comprehensive performance of the material is best,and the notch impact strength reaches 13.2 kJ/m2,which is 158.8% higher than that of the foamed material without POE. The cell average diameter is reduced to about 60 μm,and the cell density reaches a maximum of 1.19×106 cell/cm3.
引文
[1]Wang Long,Ishihara S,Ando M,et al.Fabrication of high expansion microcellular injection-molded polypropylene foams by adding long-chain branches[J].Industrial&Engineering Chemistry Research,2016,55(46):11 970-11 982.
[2]陈明,高山俊,沈春晖.聚丙烯微发泡材料改性研究进展[J].中国塑料,2018(5):8-14.Chen Ming,Gao Shanjun,Shen Chunhui.Research Progress on Modification of Micro-foamed PP[J].China Plastics,2018(5):8-14.
[3]刘晶如,胡方明,俞强.聚丙烯接枝马来酸酐改性纳米ZnO/聚丙烯复合材料的成核结晶行为及力学性能[J].复合材料学报,2017,34(7):1 526-1 532.Liu Jinru,Hu Fangming,Yu Qiang.Nucleation and crystallization and mechanical properties of nano-ZnO/polypropylene composites modified by maleic anhydride grafted polypropylene[J].Acta Materiae Compositae Sinica,2017,34(7):1 526-1 532.
[4]郝智,唐圣福,刘军,等.PP/POE/滑石粉复合发泡体系的制备与性能研究[J].现代机械,2008(2):90-92.Hao Zhi,Tang Shengfu,Liu Jun,et al.Study on the preparation and properties of PP/POE/Talc foam composites[J].Modern Machinery,2008(2):90-92.
[5]王朝,李姜,郭少云.超临界CO2下聚丙烯/乙烯-辛烯共聚物共混物微孔发泡材料的制备[J].高分子材料科学与工程,2017,33(10):108-113.Wang Chao,Li Jiang,Guo Shaoyun.Preparation of microcellular polypropylene/poly(octene-ethylene)foams by using supercritical carbon dioxide[J].Polymer Materials Science&Engineering,2017,33(10):108-113.
[6]吴智华,孙洲渝,唐卓,等.影响注塑PP微孔材料结构的工艺参数[J].中国塑料,2002(9):57-61.Wu Zhihua,Sun Zhouyu,Tang Zhuo,et al.Process parameters Influencing cell structure of injection molded PP microcellular polypropylene[J].China Plastics,2002(9):57-61.
[7]Wang Mingyi,Xie Linsheng,Qian Bo,et al.Extrusion foaming behavior of a polypropylene/nanoclay microcellular foam[J].Journal of Applied Polymer Science,2016,133(41):doi:10.1002/app.44094.
[8]Abadchi M R,Jalali-Arani A.Crystallization and melting behavior of polypropylene(PP)in(vulcanized nanoscale polybutadiene rubber powder/PP)polymer-nanocomposites[J].Thermochimica Acta,2015,617:120-128.
[9]Liang Jizhao,Zhu Bo,Ma Wenyong.Morphology and mechanical properties of PP/POE/nano-CaCO3 composites[J].Polymer Composites,2016,37(2):539-546.
[10]杨芳,刘钰馨,莫羡忠,等.弹性体增韧聚丙烯研究进展[J].塑料科技,2015,43(4):106-110.Yang Fang,Liu Yuxin,Mo Xianzhong,et al.Research progress on toughening modification of PP by elastomer[J].Plastics Science and Technology,2015,43(4):106-110.
[11]王昌银,段焕德,张纯,等.纤维对微发泡聚丙烯复合材料发泡行为的影响[J].高分子材料科学与工程,2016,32(1):131-136.Wang Changyin,Duan Huande,Zhang Chun,et al.Effect of fiber on foaming behavior of micro-foamed polypropylene composites[J].Polymer Materials Science and Engineering,2016,32(1):131-136.
[12]何跃,蒋团辉,刘阳夫,等.橡胶粒子对微发泡聚丙烯复合材料发泡行为与力学性能的影响[J].材料工程,2017,45(2):80-87.He Yue,Jiang Tuanhui,Liu Yangfu,et al.Influence of rubber powders on foaming behavior and mechanical properties of foamed polypropylene composites[J].Journal of Materials Engineering,2017,45(2):80-87.
[13]李树白,姚培,刘媛,等.PP/POE共混物形态结构与逾渗分析[J].塑料科技,2017,45(11):26-31.Li Shubai,Yao Pei,Liu Yuan,et al.Analysis of phase morphology and percolation theory for PP/POE blends[J].Plastics Science&Technology,2017,45(11):26-31.
[14]袁海兵.POE增韧改性聚丙烯/滑石粉复合材料的研究[J].中国塑料,2018(3):33-36.Yuan Haibing.Study on ploypropylene/talc composite toughened by POE[J].China Plastics,2018(3):33-36.
[15]李树白,孙毓韬,姚培,等.PP/POE共混物的流变行为分析[J].塑料科技,2018(4):34-38.Li Shubai,Sun Yutao,Yao Pei,et al.Rheological Analysis of PP/POE blends[J].Plastics Science and Technology,2018(4):34-38.
[16]郝明洋,段焕德,张纯,等.聚丙烯/有机蒙脱土复合材料的发泡行为[J].高分子材料科学与工程,2015,31(10):81-86,91.Hao Mingyang,Duan Huande,Zhang Chun,et al.Foaming behavior of polypropylene/organic montmorillonite composites[J].Polymer Materials Science and Engineering,2015,31(10):81-86,91.
[17]倪庆婷,张岳平,叶青,等.HDPE/纳米SiO2复合体系的动态流变行为[J].常州大学学报:自然科学版,2014,26(1):14-17.Ni Qingting,Zhang Yueping,Ye Qing,et al.Study of dynamic rheological behaviour of HDPE/nano-SiO2 compound system[J].Journal of Changzhou University:Natural Science Edition,2014,26(1):14-17.
[18]熊业志,刘月香,胡圣飞,等.聚丙烯发泡珠粒的结晶熔融行为与发泡特性[J].高分子材料科学与工程,2016,32(9):49-53.Xiong Yezhi,Liu Yuexiang,Hu Shengfei,et al.Melting/crystallization behavior and foaming properties of expanded polypropylene bead[J].Polymer Materials Science and Engineering,2016,32(9):49-53.
[2]陈明,高山俊,沈春晖.聚丙烯微发泡材料改性研究进展[J].中国塑料,2018(5):8-14.Chen Ming,Gao Shanjun,Shen Chunhui.Research Progress on Modification of Micro-foamed PP[J].China Plastics,2018(5):8-14.
[3]刘晶如,胡方明,俞强.聚丙烯接枝马来酸酐改性纳米ZnO/聚丙烯复合材料的成核结晶行为及力学性能[J].复合材料学报,2017,34(7):1 526-1 532.Liu Jinru,Hu Fangming,Yu Qiang.Nucleation and crystallization and mechanical properties of nano-ZnO/polypropylene composites modified by maleic anhydride grafted polypropylene[J].Acta Materiae Compositae Sinica,2017,34(7):1 526-1 532.
[4]郝智,唐圣福,刘军,等.PP/POE/滑石粉复合发泡体系的制备与性能研究[J].现代机械,2008(2):90-92.Hao Zhi,Tang Shengfu,Liu Jun,et al.Study on the preparation and properties of PP/POE/Talc foam composites[J].Modern Machinery,2008(2):90-92.
[5]王朝,李姜,郭少云.超临界CO2下聚丙烯/乙烯-辛烯共聚物共混物微孔发泡材料的制备[J].高分子材料科学与工程,2017,33(10):108-113.Wang Chao,Li Jiang,Guo Shaoyun.Preparation of microcellular polypropylene/poly(octene-ethylene)foams by using supercritical carbon dioxide[J].Polymer Materials Science&Engineering,2017,33(10):108-113.
[6]吴智华,孙洲渝,唐卓,等.影响注塑PP微孔材料结构的工艺参数[J].中国塑料,2002(9):57-61.Wu Zhihua,Sun Zhouyu,Tang Zhuo,et al.Process parameters Influencing cell structure of injection molded PP microcellular polypropylene[J].China Plastics,2002(9):57-61.
[7]Wang Mingyi,Xie Linsheng,Qian Bo,et al.Extrusion foaming behavior of a polypropylene/nanoclay microcellular foam[J].Journal of Applied Polymer Science,2016,133(41):doi:10.1002/app.44094.
[8]Abadchi M R,Jalali-Arani A.Crystallization and melting behavior of polypropylene(PP)in(vulcanized nanoscale polybutadiene rubber powder/PP)polymer-nanocomposites[J].Thermochimica Acta,2015,617:120-128.
[9]Liang Jizhao,Zhu Bo,Ma Wenyong.Morphology and mechanical properties of PP/POE/nano-CaCO3 composites[J].Polymer Composites,2016,37(2):539-546.
[10]杨芳,刘钰馨,莫羡忠,等.弹性体增韧聚丙烯研究进展[J].塑料科技,2015,43(4):106-110.Yang Fang,Liu Yuxin,Mo Xianzhong,et al.Research progress on toughening modification of PP by elastomer[J].Plastics Science and Technology,2015,43(4):106-110.
[11]王昌银,段焕德,张纯,等.纤维对微发泡聚丙烯复合材料发泡行为的影响[J].高分子材料科学与工程,2016,32(1):131-136.Wang Changyin,Duan Huande,Zhang Chun,et al.Effect of fiber on foaming behavior of micro-foamed polypropylene composites[J].Polymer Materials Science and Engineering,2016,32(1):131-136.
[12]何跃,蒋团辉,刘阳夫,等.橡胶粒子对微发泡聚丙烯复合材料发泡行为与力学性能的影响[J].材料工程,2017,45(2):80-87.He Yue,Jiang Tuanhui,Liu Yangfu,et al.Influence of rubber powders on foaming behavior and mechanical properties of foamed polypropylene composites[J].Journal of Materials Engineering,2017,45(2):80-87.
[13]李树白,姚培,刘媛,等.PP/POE共混物形态结构与逾渗分析[J].塑料科技,2017,45(11):26-31.Li Shubai,Yao Pei,Liu Yuan,et al.Analysis of phase morphology and percolation theory for PP/POE blends[J].Plastics Science&Technology,2017,45(11):26-31.
[14]袁海兵.POE增韧改性聚丙烯/滑石粉复合材料的研究[J].中国塑料,2018(3):33-36.Yuan Haibing.Study on ploypropylene/talc composite toughened by POE[J].China Plastics,2018(3):33-36.
[15]李树白,孙毓韬,姚培,等.PP/POE共混物的流变行为分析[J].塑料科技,2018(4):34-38.Li Shubai,Sun Yutao,Yao Pei,et al.Rheological Analysis of PP/POE blends[J].Plastics Science and Technology,2018(4):34-38.
[16]郝明洋,段焕德,张纯,等.聚丙烯/有机蒙脱土复合材料的发泡行为[J].高分子材料科学与工程,2015,31(10):81-86,91.Hao Mingyang,Duan Huande,Zhang Chun,et al.Foaming behavior of polypropylene/organic montmorillonite composites[J].Polymer Materials Science and Engineering,2015,31(10):81-86,91.
[17]倪庆婷,张岳平,叶青,等.HDPE/纳米SiO2复合体系的动态流变行为[J].常州大学学报:自然科学版,2014,26(1):14-17.Ni Qingting,Zhang Yueping,Ye Qing,et al.Study of dynamic rheological behaviour of HDPE/nano-SiO2 compound system[J].Journal of Changzhou University:Natural Science Edition,2014,26(1):14-17.
[18]熊业志,刘月香,胡圣飞,等.聚丙烯发泡珠粒的结晶熔融行为与发泡特性[J].高分子材料科学与工程,2016,32(9):49-53.Xiong Yezhi,Liu Yuexiang,Hu Shengfei,et al.Melting/crystallization behavior and foaming properties of expanded polypropylene bead[J].Polymer Materials Science and Engineering,2016,32(9):49-53.