全水發(fā)泡聚氨酯泡沫的制備及納米改性的研究.pdf

1、武漢理工大學碩士學位論文全水發(fā)泡聚氨酯泡沫的制備及納米改性的研究姓名：陳漢全申請學位級別：碩士專業(yè)：材料學指導教師：謝海安20070501武漢理工大學碩士學位論文AbstractPolyurethanefoamisakindofusefulsyntheticmatedalsRigidpolyurethanefoam。withadvantagesasrelativelowdensityspecificstrength，thermalcon

2、ductivityandeasytocombinewithothercomponentsandsimplecompositeformingiswidelyusedonstructuralcomponentareaPreviouslychlorofluorocarbons(CFCs)wereusedasblowingagentsinpolyurethanefoamproductionButnowpeopleknowthatCFCshave

3、gotdestructionofozonelayerBanningofCFCsasblowingagentsresultedintheuseofwaterinsteadofCFCs，becausewaterisasortofcleanfoamingagenttoenvironmentTheallwaterfoamingtechnique，itsadvantagesanddisadvantages，werereviewednleeffec

4、tofmajortechnologyparametersincludingamountofwateraswellasisocyanateindexonthefoampropertieswasdiscussedPolyurethanefoampossessesfairphysicalandmechanicalproperties、acousticalproperty、thepropertyofelectricityandtheproper

5、tyofchemicalresistanceEspeciallythetemperatureconductivityofpolyurethanerigidfoanlislowBecausethepolyurethanerigidfoamhasitsownparticularpoint，thematerialcannotbetakentheplaceofMeanwhile，thepropertyofpolyurethanefoamprod

6、uctscouldbetransfefredbyadjustingthechemicalconstitutionofrawmaterialandthedifferenceofeachfractionalmixtureratioSointhiswaypolyurethanefoamwillhavegreatlycomprehensivepracticabilityThisarticleprimarilyaltersthepropertyo

7、fpolyurethanerigidfoambythefillingofnanometerparticleandprobesevenmorebeneficialfoamingprocesscondition、compositionfortheproductionofpolyurethanerigidfoamproductTraditionalpolyurethanerigidfo鋤pronetobedeformationThiskind

8、offoanlhaslowtemperandintensityFillingnanometersi02couldenhanceitsmechanicalpropertyandincreaseitsintensityInthisway，polyurethanerigidfoamcanmoreevencomprehensiveappliestoallwalksoflifeInourstudy，wesynthesizednanosilicai

9、nW／OmicroemulsionwithpolyetherpolyolastheoilphaseThepolyetherpolyolthenreactwithTDItopreparerigidpolyurethanefoams(PUFs)viaanewprocess，usingthewaterinthemicroemulsionasblowingagentItisfoundthatthisnewmethodcailsolvethepr

10、oblemsofscorch，subsideandshrinkwhichappearduringtheprocessofpreparationofrigidpolyurethanefoamsWjstudiedtheafrectoftheprocessingconditionssuchasthestirringtimepHandtheamountofTEOSonthepreparationofW／0microemulsionandthes