Influence of Rubber Powders on Foaming Behavior and Mechanical Properties of Foamed Polypropylene Composites
HE Yue1,2,3, JIANG Tuan-hui2, LIU Yang-fu2,3, GONG Wei1,2,3, HE Li2,3
1 School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang 550014, China;
2 National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang 550014, China;
3 College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China
Abstract：Polypropylene/rubber powders composites with different kinds of rubber powders were foamed by injection molding machine equipped with volume-adjustable cavity. The effect of dispersity of rubber powders and crystallization behavior of composites on the foaming behavior and mechanical properties was investigated. The results show that the addition of rubber powders can improve the cell structure of foamed PP with fine and uniform cell distribution. And cell density and size of PP/PP-MAH/NBR foams are 7.64×106cell/cm3 and 29.78μm respectively, which are the best among these foams. Combining cell structures with mechanical properties, notch impact strength of PP/PP-MAH/CNBR composites increases approximately by 2.2 times while tensile strength is reduced just by 26% compared with those of the pure PP. This indicates that PP/PP-MAH/CNBR composites are ideal foamed materials.
何跃, 蒋团辉, 刘阳夫, 龚维, 何力. 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 Tuan-hui, LIU Yang-fu, GONG Wei, HE Li. Influence of Rubber Powders on Foaming Behavior and Mechanical Properties of Foamed Polypropylene Composites. Journal of Materials Engineering, 2017, 45(2): 80-87.
 NAM P H, MAITI P, OKAMOTO M, et al. Foam processing and cellular structure of polypropylene/clay nanocomposites[J]. Polymer Engineering & Science, 2002,42(9):1907-1918.
 KERAMATI M, GHASEMI I, KARRABI M. Microcellular foaming of PP/EPDM/organoclay nanocomposites:the effect of the distribution of nanoclay on foam morphology[J].Polymer Journal, 2012, 44(5):433-438.
 KERAMATI M, GHASEMI I, KARRABI M, et al. Production of microcellular foam based on PP/EPDM:the effects of processing parameters and nanoclay using response surface methodology[J]. E-Polymers, 2013,12(1):612-628.
 MAHARSIA R, GUPTA N, JERRO H D. Investigation of flexural strength properties of rubber and nanoclay reinforced hybrid syntactic foams[J]. Materials Science & Engineering:A, 2005,417(1):249-258.
 GUPTA N, MAHARSIA R. Enhancement of energy absorption in syntactic foams by nanoclay incorporation for sandwich core applications[J].Applied Composite Materials, 2005,12(3):247-261.
 GUPTA N, MAHARSIA R, JERRO H D. Enhancement of energy absorption characteristics of hollow glass particle filled composites by rubber addition[J]. Materials Science & Engineering:A,2004,395(1):233-240.
 GUPTA N, ZELTMANN S E, SHUNMUGASAMY V C, et al. Applications of polymer matrix syntactic foams[J]. JOM, 2014,66(2):245-254.
 SHARUDIN R W B, OHSHIMA M. Preparation of microcellular thermoplastic elastomer foams from polystyrene-b-ethylene-butylene-b-polystyrene (SEBS) and their blends with polystyrene[J].Journal of Applied Polymer Science, 2013,128(4):2245-2254.
 SHAKARAMI K, DONIAVI A, AZDAST T, et al. Microcellular foaming of PVC/NBR thermoplastic elastomer[J]. Materials and Manufacturing Processes, 2013,28(8):872-878.
 程实,顾建华,常乐,等. PP/GF/EPDM微发泡复合材料制备及性能研究[J]. 塑料科技,2014,42(5):55-58. CHENG S, GU J H,CHANG L, et al. Research on properties of PP/GF/EPDM microcellular foam composite materials and its preparation[J]. Plastics Science and Technology,2014,42(5):55-58.
 杨继年,李子全,胡孝昀,等. POE共混增韧二次发泡聚丙烯的力学性能[J].高分子材料科学与工程,2008,24(11):95-98. YANG J N, LI Z Q, HU X Y,et al. Mechanical performance of secondary-foamed polypropylene toughened by ethylene-1-octene copolymer[J]. Polymeric Materials Science and Engineering, 2008, 24(11):95-98.
 张平,杨永,王晓军,等. PP/HDPE/EPDM复合体系微孔发泡实验[J].塑料,2010,39(1):61-63. ZHANG P, YANG Y, WANG X J,et al. Experimental on microcellular foaming of PP/HDPE/EPDM blends[J].Plastics,2010,39(1):61-63.
 GONG W, LIU K J, ZHANG C,et al. Foaming behavior and mechanical properties of microcellular PP/SiO2 composites[J]. International Polymer Processing, 2012,24(2):181-186.
 GONG W, GAO J C, JIANG M,et al. Modeling and characterization of the relationship between cell size and mechanical behavior of microcellular PP/mica composites[J]. International Polymer Processing, 2010,25(4):270-274.