聚乙烯醇吹塑薄膜的研究

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1、中北大学学位论文StudyofPVAblowmoldingFilmChenLaipengJiaRunliAbstractAlongwiththedevelopmentofmodemplasticpackingprofession，methodofproductionandstudyonPVAfilmismainlyusingextrusionandblowmoldingprocess．Atpresent，thestudyofPVAblowmoldingfilmisfilmisblowoutafteraddingplasticizertoPV

2、A，thenanalyzedtheinfluenceofplasticizerOnperformanceofPVAfilm．Inthispaper，underthepremiseofmaintainingcertainmechanicsperformanceofPVAfilm，PVAfilmisstudiedafteraddingdifferentratios’TDIandglycerin，andtheinfluenceofdifferentratios’TDIandglycerinonmechanicalpropertiesisinves

3、tigated．Atthesametimeplasticizedmechanismofglycerinandcross—linkedmechanismofTDIindifferentsystemsisstudied．Astoglycerin，therearedifferentplasticizedmechanismsindifferentsystems，yetglycerinalwaysplasticizethesystemwhichcontainglycerin，Whenthecontentofotheringredientsinsyst

4、emareunvaried，withglycerinincreasing，tensilestrengthandtearingstrengthofPVAblowmoldingfilmreduce，butbrokenextendingrateincreases．Forexample(takethecrosswisedataasexample)：whenPVAislkg，andTDIislml，thecontentofglycerinincreasefrom3009to4509，thetensilestrengthPVAblowmoldingfi

5、lmdeducefrom53．29MPato41。27MPa，thetearingstrengthofPVAblowmoldingfilmdeducefrom184．48MPato152．8MPa，andbrokenextendingrateofPVAincreasefrom291，35％to421．05％．AstoTDI，therearedifferentcross-linkedmechanismsindifferentsystems，yetitingeneralhascross—linkedperformance．Andwhenthec

6、ontentsofothersingredientsinsystemareunvaried，withthecontentofTDIincreasing，tensilestrengthandtearingstrengthofPVAblowmoldingfilmincreasefirst，Afterwardsitreduces；andbrokenextendingrateofblowmoldingfilmreducesfirst，afterwardsitincreases．Forexample：whenPVAcontentislkg，andgl

7、ycerincontentislml，EVOHcontentis409，withthecontentofTDIincreasefrom中北大学学位论文0．5mlto2．5m1．thetensilestrengthPVAblowmoldingfilmincreasefrom35．45MPato41．14MPathenreduceto39．71MPa，thetearingstrengthofPVAblowmoldingfilmincrease行om147．47MPato158．14MPathendeduceto143．78MPa．andbrok

8、enextendingrateofPVAdedueefrom462．18％t0371．68％thenincreaseto424．27％．Therelationshipbetwee