基于微纳层叠方法的高性能pvc材料制备及其性能的-研究

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1、摘要14．12％和37．65％。这为制备低成本、高性能、工艺简单的高分子材料制品提供了一种新的途径。4、针对新型层叠器能提高高分子材料取向度的问题，采用Moldex3D模流分析软件对层叠器取向单元的取向作用进行了模拟。通过研究短纤维增强树脂基复合材料在层叠取向单元中的纤维分布情况，间接分析层叠流道对高分子链的取向作用。结果表明，纤维在层叠流道中有较高的取向一致性，纤维的取向主要集中在沿着挤出流动方向接近流道壁的位置处，由此说明流道对高分子的取向作用是通过流道壁对高分子熔体的剪切作用实现的。本次模拟印证了利用层叠装置加工高分子材料得到高取向度

2、制品的可行性，对研究层叠器的取向机理有重要的参考意义。关键词：微纳层叠，PVC，取向，阻隔性能，增塑剂迁移IIIABSTRACTTHESTUDYOFHIGHPERFORMANCEPVCMATEIUALMICRO．NANOLAMINATIONPREPARATIONDEVICEANDPROPERTYPVCisthelargestoutputandthemostwidelyusedsyntheticresininourcountry．Becauseofitsextensivesources，excellentcomprehensiveperfor

3、mance，lowprice，easymoldingandsealingcharacteristics，itiswidelyusedinpackagingmaterialsfield．But，ontheotherhand，becausethebarrierpropertyofPVCcannotmeetthehighrequirementsofsomepackingmaterials，andtheproblemofplasticizerandotheradditivesforitspoorthermalstabilitybringsabout

4、theproblemsofenvironmentalprotectionandpotentialtoxicity,alloftheselimitthedevelopmentofPVCmaterialinpackagingfield．Micro—nanolaminationextrusiontechnologyisanewprocessingmethod，materialscanbedividedintohundredsofmicrolayersusingthistechnology,andthethicknessofeachlayercan

5、reachmicronorevennanometerlevel，themorphologicalstructureofpolymermaterialsCanbechanged，SOastoobtainmoreexcellentperformanceoffunctionalmaterials．ThispaperproposesanewV北京化工大学硕士学位论文micro—nanolaminationdevice，andsinglePVCmaterialisextrudedusingthisdevice，andthegasbarrierprop

6、ertiesandplasticizermigrationperformanceofthePVCsheetsproducedbymicro—nanolaminationextrusiontechnologyhavebeenresearched．Themaincontentsareasfollows：1．Thebarrierpropertiesandplasticizermigrationperformanceofpolymermaterialsareintroduced，andthemethodsofimprovingbarrierprop

7、ertiesandinhibitingplasticizermigrationofpolymermaterialsaresummarized．Themechanismofpenetrationeffectisdescribedbriefly,andthefactorsthataffectthepene仃ationeffectareemphaticallyintroduced．Orientationanddegreeoforientationarebrieflyintroduced，andthemeasurementmethodsofthed

8、egreeoforientationofpolymermaterialsaresummarized．Themicro．nano1aminationextrusiontechnol