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ID:33007228
大小:2.02 MB
页数:70页
时间:2019-02-19
《干湿纺聚丙烯腈碳纤维原丝的成形机理分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、查兰查兰竺主兰竺堕塞——————±塑望墨亘堕堕堡!!生堕兰塑壁墅坐些塑茎bimodallineswereahnostparalleltothePAN4DMSOaxis;ariel‘associatedbyBoomfunction,itwasfoundedthattheobtainedlinewouldhaveaturnatsomePANvolumefractionandtheslopeandinterceptweredifferentindifferentsystems,whichwereallrelatedwiththeinteractionparameters;
2、threemethodsaboutchangingtheinitialcomponentofspinningsolutionwereobtainedbythequalitativeanalysisSOthatthecoagulationbehaviorwouldbeenadjusted.Themasstransferdynamicsofdiffusionisveryimportantandsomestudiesweretriedtosetupthecomponentconcentrationfunctions.Thepolymersolutionstreamwasd
3、ividedasseveralgrowthringsandtheconcentrationdistributionalongthefiberradiuswasevolvedfromthefirstrickdiffusionlaw.Anothermethodwastriedtosolvethesecondrickdiffusionlaw.Thediffusioncoefficientswerecalculatedbydifferenttheoreticalfunctions.Thediffusioncoefficientsweredifferentfromthecal
4、culateddata,becausePANcouldhindersolventandnon—solventindiffusionandthedatawereapparent.TheanalysisoftheexperimentalresultsfromKojiTeradashowedthattheapparentdiffusioncoefficientswereinfluencedbythetemperature,spinneretradiusandcoagulantconcentration.Theradiusvariationoffibercouldhavet
5、woeffects.whichwerethevariationsofthediffusionsurfaceandthediffusiongradient.ThecomponentconcentrationalongtheradiusoffiberspunfromPAN/DMSOsolutionwasobtainedwiththeuseofcalculateddiffusioncoe箍cients.Andtheresultscalculatedfromthetwodifferentmasstransferfunctionsweresimilarwitheachothe
6、r.Thesolventconcentrationwasoftadialgradientandthesolventonthesurfaceoffiberreachedtheequilibriumstateinstantaneously.Thegeldynamicsexperimentsshowedthatthe2e1formationlawwassimilarwiththeotherpolymersystems,whichwasVII东华犬学硕士学位论文一一!望堑鐾亘堕堕壁竺丝堡竺塑坚墅塑堡竺蒌一relatedwithdensesurfaceunderthesoft
7、coagulatingconditionandthethickeninggel;thesquareofgelthicknesswaslinearwithcoagulationlime.Thequalitativeanalysisofthesurfacepuckersoffibersspunfromwetspinninganddry-jetwetspinningwasmade.Thepositionswherethedieswellappearedwerenotthesameandthedieswellappearedattheairgapwherethefibe
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