POE-g-MAH和PC协同增韧聚对苯二甲酸丁二酯的脆韧转变

魏刚; 彭娅; 龙盛如; 黄锐

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航空材料学报 ›› 2006, Vol. 26 ›› Issue (6) : 77-80.

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论文

POE-g-MAH和PC协同增韧聚对苯二甲酸丁二酯的脆韧转变

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Brittle-to-Ductile Transition of Poly(Butylene Terephthalate) Synergistically Toughened by POE-g-MAH and PC

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摘要

研究马来酸酐接枝乙烯-辛烯共聚物弹性体(POE-g-MAH)和热塑性树脂(PC)协同增韧聚对苯二甲酸丁二酯的脆韧转变,借助扫描电镜(SEM)观察分析增韧体系的相形态和断口形貌,并对增韧机理进行探讨。结果表明,添加PC后,共混体系的脆韧转变在较低POE-g-MAH含量下发生。当PBT与PC质量配比为50/50时,共混物在POE-g-MAH含量为10%时获得超高韧性,达到78kJ/m2,同时拉伸强度达到52.5MPa。SEM分析认为,PC含量较高时,呈现极不规则的近似条状或片状的分散相结构,以及柔性界面层的存在是共混体系在较低弹性体含量下出现脆韧转变而获得高强韧性的主要机制。

Abstract

The brittle-to-ductile transition of poly(butylene terephthalate) synergistically toughened by anhydride grafted poly(ethylene-octene) copolymer elastomer(POE-g-MAH) and thermoplastic resin(PC) was investigated.The morphologies of dispersion phase and fractured surfaces were observed and analyzed with the help of scanning electron microscope(SEM).And the toughening mechanism was also approached.The brittle-to-ductile transition of the blends was observed at a lower POE-g-MAH content for the addition of PC.When POE-g-MAH content was up to 10%,the notched impact strength of the blend with PBT/PC mass ratio of 50/50 was up to 78kJ/m2,with the tensile strength up to 52.5MPa.SEM micrographs showed that the dispersed phase of PC took a very irregular microstructure of slat-like or plate-like shape at higher content of PC.It should be noted that the particular phase morphology of PC covered with a soft layer of POE-g-MAH was the principal mechanisms of strengthening and toughening of the ternary blends.

导出引用

魏刚, 彭娅, 龙盛如, 黄锐. POE-g-MAH和PC协同增韧聚对苯二甲酸丁二酯的脆韧转变[J]. 航空材料学报, 2006, 26(6): 77-80

WEI Gang, PENG Ya, LONG Sheng-ru, HUANG Rui. Brittle-to-Ductile Transition of Poly(Butylene Terephthalate) Synergistically Toughened by POE-g-MAH and PC[J]. Journal of Aeronautical Materials, 2006, 26(6): 77-80

参考文献

HOBBS S Y,DEKKERS M E J,WATKINS V H.Toughened blends of poly(butylene terephthalate) and BPA polycarbonate,Part 1:Morphology[J].J Mater Sci,1988,23:1219-1224.
DEKKERS M E J,HOBBS S Y,WATKINS V H.Toughened blends of poly(butylene terephthalate) and BPA polycarbonate,Part 2:Toughening mechanisms[J].J Mater Sci,1988,23:1225-1230.
WU J SH,GUO B H,CHAN CH M,et al.Synergistic toughening effect of SBS and HDPE on the fracture of the PS/HDPE/SBS blends[J].Polymer,2001,42:8857-8865.
周丽玲,吴其晔,杨文君,等.刚性有机粒子对聚氯乙烯/氯化聚乙烯共混体系形态和增韧机理的研究[J].高分子学报,1996(1):87-90.
闫瑞萍,梁善杰.PP/EPDM/HDPE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.
WEI Gang,HUANG Rui,SONG Bo.Toughening effect of ethylene-octene copolymer grafted maleic anhydride on poly(butylene terephthalate)[J].China Synthetic Rubber Industry,2004,27(2):115-115.
罗毅,肖勤莎.PBT工程塑料及其发展趋势[J].中国塑料,1998,12(1):9-14.
AROSTEGUI A,GAZTELUMENDI M,NAZABAL J.Toughened poly(butylenes terephthalate) by blending with a metallocenic poly(ethylene-octene) copolymer[J].Polymer,2001,42:9565-9574.
MARTIN P,DEVAUX J,LEGRAS R,et al.Competitive reactions during compatibilization of blending of poly(butylenes terephthalate) with epoxide-containing rubber[J].Polymer,2001,42:2463-2478.
董丽杰,张会轩,杨海东,等.EPM-g-GMA接枝率的测定及其增韧PBT的力学性能和形态结构研究[J].高分子学报,2003(2):167-170.