碳纤维聚丙烯腈原丝高分子的合成控制制备研究-材料加工工程专业论文.docx

东华大学硕士学位论文速率有明显的作用。如在220℃处理3Omin，P(AN一co一M M IA)的环化程度比PAN的环化程度高得多。为了研究纺丝原液的可纺性，利用德国HAAKE公司RSI型流变仪测试了队N心M SO 溶液的流变性质。结果发现:分子量越高，PAN 溶液的表观粘度对剪切速率的变化越敏感，当分子量达到10.83万时，队N共聚物纺丝液的结构指数达到2.98。并发现溶液表观粘度会随纺丝温度的升高而下降。对P(AN一co一MA)、P(AN一co一M M IA)、P(AN一co一IA)三种相同分子量相同浓度的聚合物溶液流变性能研究发现，P(AN一co一M A) 溶液的纺丝性能最好，P(AN一co一M M IA)溶液的纺丝性能介于其它两种共聚物之间。关键词:丙烯睛衣康酸单甲酷热性能流变性能学生:陈桂莲(材料加工工程指导老师:东华大学硕士学位论文ControllablePreParation and ProPertiesofPolyacrylonitrileCoPolym erforCarbonFibrePreeursorA B STR A C TThehighstrengthandhighmodulusPerformaneeofearbonflbermainlydePendonthekindandqualityofPreeursor，teehnologyofPre一oxidationandearbonization.H igh quality Polyaerylonitrile15 the m ain key factorsto PrePare PerfeetPrecursorfiber.There aresom e differenee and shortage on dom estie earbon fiberresearc h，esPeeially on high Performanee RANPolym erand Preeursor.The qulity ofPANPreeursor fibrehasbeentheehokePoiniofdeveloPinghighPerformaneeearbonfiberin our eountry.PAN PreeursorPolym ersused forhigh Perform anee Polyaerylonitrile(PAN)Preeursorsean be PrePared by eoPolym erzation ofaerylonitrile(AN)withapProPriate com onom ers.In thisP aper，we m aiuly investigated the effectofstruetureand feed ratio ofeom onom erson structureand ProPertiesofPANeoPolym ers.Free一radical solutionpolymerizationsofA Nwithitaconieacid(IA )，methacrylate(M A)，monomethyitaconate(M M IA)wereearrledout.Theeffe etoffeedratio，eoneentrationofeom onm er，tem Peratureofreaetion and eoneeniration ofinitiatoroneoPlym erization w erestudied.The eonversion ofthePolym erization andthe relative averagem oleeularweightofProduetsweredeterm ined by w eighting andU bbelondhe viseosim eter apProaches，resPeetively.It was shown that thePolym erizationyeildincreasesw iththeinereaseofreactiontem Perature，eoneentrationofm onom er，eoneenirationof initiator，but deereases w ith theincreasem entofeom onom ereonient.Therelativem oleeularw eightofthecoPolym ersdeereasesw iththeincreaseo freaetion temP erature，eon eentration ofinitia