高固含量聚合物聚醚多元醇的合成研究.pdf

1、天津大學碩士學位論文高固含量聚合物聚醚多元醇的合成研究姓名：呂世軍申請學位級別：碩士專業(yè)：材料學指導教師：郭睿威20031201ABSTRACTPolymerpolyol(POP)arestabledispersionsofglassypolymersinpolyetherpolyolsInthiswork、thePOPwithhighsolidcontentof45％werepreparedbydispersioncopolymeri

2、zationofstyrene(st)andacrylonitrile(AN)inpolyetherpotyolsWithpolyethermeilatetypemacromonomerasstabilizerprecursorinselni—batchsingle—reactorandtwo—reactorcontinuousandseededbatchprocessesThestabiIityandviscosityandthedi

3、stributionofparticlesizeofPOPwerestudiedForthepurposeofimprovingthestabilizingabilityOfthemacromonomerforthePOP，variousmacromonomersweresynthesizedbyreactingvariouspolyetherswithmateicanhydrideatdifferenttemperature，ande

4、valuatedfortheirstabilizingabilitiesTheresultsshowedthatthefunctionalityandmolecularmassofmacromonomerwerethecrucialfactorsfortheirstabilizingability，Therefore，anovelmacromonomerwithfourfunctionalitywassynthesizedTheeffe

5、ctsofpolymerzatio“parametersonstabilityandviscosityofPOPwereinvestigatedinsereibatch，seeded—batchandcontinuousprocesses，respectively，whilethecorrespondingparticleshapeandsizedistributionweredeterminedbySEMandlasergrading

6、analysisTheresultsindicatedthatthepolymerizalioninbothparticlephaseanddispersephaseplayedimportantrolesonthestabilityandparticlenumberofPOPAndthattheparticlesizeanddistributionwerethekeyfactorforcontrollingtheviscosityof

7、POP，wideparticledistributioncanlowtheviscosityofPOPwhilesmallparticlesincreasingtheviscosityofPOPSoPoPwithlowViscositycanbeobtainedinbothtwo—reactorcontinuousandseeded—batchprocess，whichcanproducePOPwithlargeparticleSize

8、withwidedistributionByoptimizing，thePOPwithsolidcontentof45％andviscosityof4700mPaSwasobtainedThepolymerizationmechanismofcontinuousprocesswasstudiedTheresultladicatedthattherewasthephenomenonofnecu／ationinthesecondreacto

9、rintworeactorcontinuousprocessThephenomenoncanincreasetheviscosityofPOPSothekeyfactorintwo。reactorcontinuousprocesswasthereducingofneuclatiOninthesecondreactorKeywords：High’content，Low—viscosity，Polymer—polyo]，Continuous