发泡聚乙烯醇的缓冲与吸液特性分析-(5531)

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1、浙江理工大学硕士学位论文发泡聚乙烯醇的缓冲与吸液特性研究modulus，plateaustressandenergyabsorptionvalueofexpandedPVAonplatformzoneincreasedasrelativehumidityincreased，ordecreasedastemperaturerose，andtheinitialelasticmodulusvaluewasfromO．8MPato6．5MPa，plateaustressvaluewasfrom0．08MPatoO．55MPa，en

2、ergyabsorptionvalueofexpandedPVA0nplatformzonewasfromO．064J／cm3to0．25J／cm3．Finally，onthebasis，theconstitutiverelationmodelofexpandedPVAwasestablishedincludingtheparameterofdensity,strainrate，temperatureandhumidity,andthenwasverified．Themodelcouldeasilypredictmecha

3、nicalpropertiesofexpandedPVAunderdifferentconditions．LiquidabsorptionbehaviorofexpandedPVAunderdifferentinfluencefactorswasstudiedbyliquidabsorptiontests，theinfluencefactorsincludedthedensityofmaterial，liquidtype，liquidtemperatureandconcentration，etc．，andtheeffect

4、ofwhichonliquidabsorptionpropertiesofexpandedPVAwasdescribed．TheresultsshowedabsorptionrateofexpandedPVAwasmorethantentimesasthequalityofmaterialitself,andliquidretentionratewas10％-15％．BycombiningporestructureandhydrophilicgroupofexpandedPVA，liquidabsorptionmechan

5、ismofexpandedPvAwasanalyzed．whichindicatedalargeamountofliquidflowintointernalporosityofmaterialbyphysicalabsorption．Andonthebasis，somesuggestionswereproposedtoimproveliquidabsorptionpropertiesofexpandedPVA．Cushioningpropertiesandliquidabsorptionpropertiesofexpand

6、edPVAwerestudiedessentiallybytheaboveresearch，whichhasimportantpracticalsignificanceforpackagingapplicationofexpandedPVAinthelateresearchandprovidesexperimentaldataandtheoreticalbaSiSKeywords：expandedpolyvinylalcohol；cushioningcharacteristic；liquidabsorptionproper

7、ties；stress—strain；packagingV浙江理工大学硕士学位论文发泡聚乙烯醇的缓冲与吸液特性研究目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一IAbstract⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．III目录⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一I第一章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯l1．1引

8、言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．11．2发泡聚乙烯醇概述⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21．2．1发泡聚乙烯醇的性能⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．31．2．I．1多孔性⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯