具模量反差共混體系相分離形態(tài)的研究.pdf

1、東華大學(xué)碩士學(xué)位論文具模量反差共混體系相分離形態(tài)的研究姓名：嚴(yán)廣專申請學(xué)位級別：碩士專業(yè)：材料加工指導(dǎo)教師：李光20050101StudyonthePhase—separatedStructuresofPolymerCompositeswithModuluslnhomogeneityAbstractInthispaperthephaseseparationmechanismofpolymercompositeswithmodulusin

2、homogeneitywasinvestigatedbyusingcomputersimulationinaframeworkofpaaemdynamics，throughwhichtheformationofphasestructuresofdodecylbenzenesulfonicaciddopedpolyaniline／polyacrylonitriteblends(PANI—DBSA／PAN)wasinterpreted，PA

3、NI—DBSAwasobtainedthroughemulsionpolymerizationfromanilineinwaterchloroform—DBSAsystemwithamineammoniumpersulpilateactingasoxidantandDBSAasemulsifiteranddopingagentsimultaneouslyThePANIDBSA／PANblendfilmswereobtainedbyusi

4、ngsolutioncast，TheconductivitiesoftheblendfilmsweretestedandtheirphasemorphologieswerealsoinvestigatedbymeansofOM，SEM，andDMAOntheotherhand，thePANI—D8SA鍾IANblendfiberswerealsopreparedviaconventionalwetspinningtechniquefor

5、PANfiberItwasfoundthatPANI—DBSA／PANblendfilmsshowedgoodconductivitiesandtheconductivepercolationthresholdoflayat4wt％ofPANI—DBSATheblendfilmspossessedtheSO—calledskin—COrestructures，ie，intheskinlayerPANIDBSAdispersedascon

6、nectivenetworkswhileinthecorelayerasisolateddropletsItcouldbeconcludedfromtheDMAanalysisthatthemodulusofPANWashigherthanthatofPANI—DBSAMoreovertheconductivitiesofPANIDBSA／PANblendfilmswerepriortothoseofPANI，DBSA／PANblend

7、fibersThekineticmodelforthephaseseparationofpolymercompositeswithmodulusilthomogeneityWasestablishedbyincorporatingthecouplingbetweencompositionalorderparameterandelasticfield，andthemotionequationwasnumericallysolvedbyus