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采用双螺杆挤出机将甲基丙烯酸缩水甘油酯(GMA)同时接枝到乙烯-辛烯共聚物(POE)和线性低密度聚乙烯LLDPE上,而后将接枝产物与聚对苯二甲酸丁二醇酯(PBT)反应性共混,通过改变POE/LLDPE比例确立了PBT/(POE/LLDPE)-g-GMA共混物分散相的最佳组成.以此为基础考察了GMA加入量对共混物的力学性能、流变行为及相形态的影响,并对共混物的形变机理进行了研究.实验结果表明,POE/LLDPE比例为50/50时冲击强度最大,在此组成下共混物的冲击强度随着GMA加入量的增加而呈现先增大后减小的趋势,并在GMA加入量(GMA/(POE+LLDPE))为5%时达到最大值;体系黏度随GMA加入量的增加而增大,过量的GMA会导致严重的交联,不利于分散相的分散,从而降低了增韧效率;橡胶粒子的空洞化促使基体发生剪切屈服是其主要的形变机理,LLDPE的引入能促进PBT发生进一步形变,从而提高增韧效率.

参考文献

[1] 董丽杰,张会轩,杨海东,熊传溪.熔融法制备EPDM-g-GMA及其与PBT的共混增韧[J].高分子材料科学与工程,2002(02):104-106.
[2] 陈晓浪,罗筑,于杰,樊泽东,何力.ABS/PBT共混合金的增容研究[J].高分子材料科学与工程,2006(02):161-164.
[3] Huang JJ;Keskkula H;Paul DR .Comparison of the toughening behavior of nylon 6 versus an amorphous polyamide using various maleated elastomers[J].Polymer: The International Journal for the Science and Technology of Polymers,2006(2):639-651.
[4] Hashima K;Usui K;Fu L;Inoue T;Fujimoto K;Segawa K;Abe T;Kimura H .Super-ductile PBT alloy with excellent heat resistance[J].Polymer engineering and science,2008(6):1207-1213.
[5] A. Arostegui;M. Gaztelumendi;J. Nazabal .Toughened poly(butylene terephthalate) by blending with a metallocenic poly(ethylene-octene) copolymer[J].Polymer: The International Journal for the Science and Technology of Polymers,2001(23):9565-9574.
[6] Loyens W.;Groeninckx G. .Phase morphology development in reactively compatibilised polyethylene terephthalate/elastomer blends[J].Macromolecular chemistry and physics,2002(10/11):1702-1714.
[7] Sun SL;Tan ZY;Zhang MY;Yang HD;Zhang HX .Influence of the degree of grafting on the morphology and mechanical properties of blends of poly(butylene terephthalate) and glycidyl methacrylate grafted poly(ethylene-co-propylene) (EPR)[J].Polymer international,2006(8):834-842.
[8] Yu ZZ.;Lei M.;Ou YC.;Yang GS. .On compatibilization and toughening of a copolyester with a maleated thermoplastic elastomer[J].Polymer: The International Journal for the Science and Technology of Polymers,2002(25):6993-7001.
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