側(cè)基對水在固化環(huán)氧樹脂中的吸收和擴散性能的影響.pdf

1、復旦大學碩士學位論文側(cè)基對水在固化環(huán)氧樹脂中的吸收和擴散性能的影響姓名：丁遺福申請學位級別：碩士專業(yè)：高分子化學與物理指導教師：李善君2001.6.8塑墨焦蘭蘭竺堡主蘭垡笙塞一ContributionsofthesidegroupstothecharacteristicsofwaterabsorptionincuredepoxyresinsAbstractAseriesofnovolacepoxyresinswaspreparedwit

2、hOH一，CH3COO，C3H7COO。andC6HsCH2COO—sidegroupsseparatelyandthecuredresinsarenamedasEP，EPA，EPBandEPPrespectivelyTheinfluenceofthesidegroupsonthewaterabsorptionbehaviorofthecuredepoxyresinswasinvestigatedusinggravimetricmeth

3、od，DSC，positronannihilation(PA)andBETadsorptionTheeffectsoftheabsorbedwaterontheepoxyresinswerestudiedusingDMA，TMA，IRandDSCTheexperimentalresultsshowthatthepackingofthenetworkoftheesterifiedsystemsislooserthanthatofEPbec

4、auseofthelackingofhydrogenbondbetweenthechainsTheequilibriumwatercontent(M0ofEPishigherthantheotherthreesystems，butthediffusioncoe伍cient(D)ofEPisthelowestatallthetemperaturestudiedM。ofEPvariesslightly、vitlthetemperaturer

5、agingfrom20to80。CWhileinthecasesofthemodifiedresins，M。increasessignificantlywiththetemperatureAtthesametime，theflexibilityofthesidegroupmayalsopayanimportantroleindeterminethecharacteristicsofthewateruptal(eanddiffusion，

6、andsomeofthenanoporcsarebecameunreachableduetothemovementofthesidegroupsTherefore，theM。oftheEPBisthelowestatthefourtemperatures，althoughithasthelargestspecificvolumeofthefoursystemsTheDMAandDSCexperimentrevealsthatthedyn