二异氰酸酯法制备聚酰胺酰亚胺工艺的研究.pdf

摘要上海师范大学硕士学位论文nntA=:1、最佳固含量为20%,,℃,℃,热性能高于文献报道水平,达到,并且产物具有优异的耐溶剂性能。,制备了改性PAl产物。利用核磁共振氢谱(1H枷)、特性粘度、差示扫描量热法(DSC)、热失重(TGA)等表征手段对产物结构进行了分析并筛选出最优的第三单体投料量。结果显示:(1)最优nMDl:nTDI=7:3,,,。C,。C;(2)最优nMDI:nppDi=7:3,,,。C,。C。。,可满足更高应用领域的需求。关键词:偏苯三酸酐;二苯甲撑二异氰酸酯;对苯二异氰酸酯;甲苯二异氰酸酯;;聚酰胺酰亚胺论文类型:c上海师范大学硕士学位论文ABSTRACTABSTRACTPolyamide—imide(PAI)isahighperformanceengineeringmaterialwithheat-,dielectricproperties,mechanicalpropertiesandchemicalstability,andiswidelyusedinsomehigh—techfieldsuchasaviation,,PAlsweresynthesizedfromtrimelliticanhydride(TMA)anddiphenylmethene-4,4’diisocyanate(,solventsifting,solventwaterremoval,post-processingofproduct,thestructureoftheproduct,reactiontemperature,reactiontime,monomerfeedratioandmonomerconcentrationwereinvestigatedbyintrinsicviscositymachine,DSC,’,"C,℃.|msp硝西e蠢plores砷lymerizationtechnolo爵abo啦PPⅨ鲢TDI舔1|量j_e’third;monomerofmodifiedPALp嘲硒呻蠡奴蛐gproportionwasoptimized;i靠碴c旆tteristicsoftl浯product访§如§,5mⅣ爵T11emainresearchcontentsareasfollows:、析mone-,solventsifting,solventwaterremovalandpost-processingofproductwereinvestigatedbyintrinsicviscositymachine,DSC,,NMPassolvent,