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1、北京化工大学毕业设计（论文）玻纤增强耐高温液晶聚酯的增韧改性摘要液晶聚合物(LCP)这一种新型的工程塑料，具有高强度、高刚性、耐高温、电绝缘性等优良性质，被用于电子、电气、光导纤维、汽车及宇航等领域。针对LCP韧性比较低的缺陷，使其韧性增强是国内外研制开发新型工程塑料的一个努力方向。液晶聚酯具有较高的熔融温度，对增韧剂要求较高。相比较，用弹性体增韧的增韧效果最好。弹性体增韧液晶聚酯应具有的结构特征:液晶聚酯为连续相，弹性体为分散相;弹性体适度交联和基体间有化学键连接。本工作以液晶聚酯为基体树脂，研究三元乙丙
2、弹性体(EPDM)和/或聚乙烯辛烯共弹性体(POE)为增韧剂，通过双螺杆挤出机熔融反应挤出，用马来酸酐使POE酸酐化生产接枝共聚物POE-g-MAH；然后，把接枝好的POE-g-MAH加到液晶聚酯中，用双螺杆挤出机造粒、注射机制样，制备了LCP/POE-g-MAH共混的样条，研究了LCP/POE-g-MAH=90/10、80/20、70/30、60/40、50/50（质量比）共混的冲击、拉伸强度等性能的影响。结果表明：POE对液晶聚酯有一定的增韧作用，提高了树脂的冲击强度，但是POE的用量也不是越多越好，P
3、OE达到一定的程度后，增韧的作用将降低，而且还会影响其他性能。关键词：马来酸酐；接枝；液晶聚酯；增韧母料；增韧结构性能40北京化工大学毕业设计（论文）Tougheningofglassfiberreinforcedheat-resistantLCPLiquidcrystalpolymer(LCP)thatanewengineeringplastics,highstrength,highstiffness,hightemperature,goodelectricalinsulationproperties,e
4、tc.,areusedinelectronic,electrical,fiberoptics,automotiveandaerospaceindustries.LCPtoughnessforlowdefect,toenhancetoughnessisdevelopedathomeandabroadanewdirectionforengineeringplastics.Thisworkwasdesignedtoshowagoodrigidliquidcrystalpolyesterelastomertough
5、enedstructuralcharacteristicsshouldbe:forthecontinuousphaseliquidcrystalpolyester,elastomerisdispersed;elasticappropriatecrosslinking.Andtherearechemicalbondsbetweenthematrix.Toachievetheabovedesignideas,andgetbettertechnicalandeconomicratios,theworkinitia
6、llyasmatrixliquidcrystalpolyesterresin,EPDMelastomer(EPDM)and/orpolyethylene-octeneelastomertotal(POE)toincreaseRenagent,bytwin-screwextrudermeltextrusion,soPOEwithmaleicanhydridegraftcopolymeranhydrideproductionPOE-g-MAH;then,tograftgoodPOE-g-MAHaddedtoth
7、eliquidcrystalpolymerester,theuseoftwin-screwextrudergranulation,injectionmechanismslike,preparedLCP/POE-g-MAHblendspline,oftheLCP/POE-g-MAH=90/10,80/20,70/30,60/40,50/50(massratio)blendsofimpact,tensilestrengthandotherproperties.Theresultsshowedthat:POEon
8、theliquidcrystalpolyesterhasacertaintoughness,andimprovetheimpactstrengthoftheresin,butnotasmuchaspossibletheamountofPOE,POEuptoacertainextent,thetoughnessandwillreduce,butalsoaffectotherproperties.Keywords:M
