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1、摘要树脂基复合材料以其轻质、高强、高磨等特性广泛应用于航空航天、汽车工业等领域。双马来酰亚胺树脂同样具有良好的耐高温、耐辐射、耐湿热、吸湿率低和热膨胀系数小等一系列优良特性，克服了环氧树脂耐热性相对较低和耐高温聚酰亚胺树脂成型温度高压力大的缺点。但是，由于双马来酰亚胺树脂固化物的交联密度高、分子链刚性大而使其呈现出较大脆性，表现为抗冲击性差、断裂韧性低。因此，基于本课题，我们需要对BMI树脂进行改性，提出以环氧树脂改性双马来酰亚胺树脂来提高其韧性。本文采用环氧树脂改性双马来酰亚胺树脂，探究环氧/双马来酰亚胺树脂体系，研究了环氧树脂用量对双马来酰亚胺树脂
2、力学性能的影响与其热变形温度的关系。通过实验，得出环氧树脂改性双马来酰亚胺树脂的最佳配比，其配比为E44:MDA:BMI=1:1:2.。研究表明，经过改性的双马来酰亚胺树脂在保持优良的耐热性的同时，其韧性也有显著的提高。说明改性后的双马来酰亚胺复合材料具有良好的耐热性、韧性和实用性。关键词：双马来酰亚胺树脂；环氧树脂；力学性能；热变形温度AbstractPolymermatrixcompositesarewidelyusedinaerospace,automotiveindustryandotherfields,becauseoftheirlightw
3、eight,highstrength,hightouchfeatures.Bismaleimideresinalsohashightemperatureresistance,radiationresistance,heatresistance,lowmoistureabsorptionrateandlowcoefficientofthermalexpansionaseriesofexcellentproperties,anditovercomesthedefectoftherelativelylowheatresistanceofepoxyresina
4、ndhightemperaturewithhighpressurewhenthehightemperatureresistantpolyimideresinmolding.But,bismaleimideresinexhibitsarelativelyfragilebecauseofitshighcrosslinkingdensity,molecularchainrigidity,appearingpoorinimpactresistance,lowfracturetoughness.Therefore.basedonthesubject,thebis
5、maleimideresinneedtobemodifiedandproposethatepoxyresinmodifiedbismaleimideresinimprovetheiroverallperformance.Thisarticleintendstomakearesearchontheepoxybismaleimideresinsystemandstudythecontentofepoxyresinonbismaleimideresinmechanicalpropertiesaswellastherelationshipbetweenthei
6、nfluenceofmodifiedbismaleimideresinandheatdistortiontemperature,adoptingthematerialofepoxyresinmodifiedbismaleimideresin.TheexperimentsshowthatthebestratioforepoxyresinmodifiedbismaleimideresinisE44:MDA:BMI=1:1:2.IthasbeenshowedinthestudythatthebrittlenessofmodifiedBismaleimider
7、esincanbegreatlyimprovedwhilemaintainingtheexcellentheatresistancesimultaneously,whichindicatedthatthemodifiedbismaleimideresincompositeshavefavorableheatresistance,toughnessandpracticality.Keywords:bismaleimideresin;epoxyresin;mechanicalproperties;thermaldeformationtemperature目
8、录1绪论-1-1.1双马来酰亚胺树脂（BMI）-1-1.1.1BMI树脂简介-1-1.1.2B
