天然橡膠交聯(lián)密度和動態(tài)性能的研究.pdf

1、青島科技大學(xué)碩士學(xué)位論文天然橡膠交聯(lián)密度和動態(tài)性能的研究姓名：畢薇娜申請學(xué)位級別：碩士專業(yè)：材料加工工程指導(dǎo)教師：趙樹高20070420青島科技大學(xué)研究生學(xué)位論文STUDYONTHECROSSLINKDENSITYANDDYNAMICPROPERTIESOFNRCOMPOUNDANDVULCANlZATESABSTRACTSomebasicpropertiessuchasvulcanizationprocessofthenatureru

2、bber(rcR)，thecrosslinkdensityofthevulcanizates，andthedynamicpropertiesoftheNilcompoundsandvulcanizateweresystematicinvestigatedbyemployingtheNuclearMagneticResonanceCmsslinkdensityspectrometer(NMR—CDS)andRubberProcessing

3、Analyzer(RPA)Therelationshipsofthesepropertieswiththecuringsystemsuchassulfurcontenttypesandcontentoftheacceleratorcuringactivatorandcuringtemperaturewerestudied，andsomevaluableruleswerediscoveredTheNMR—CDSresultsshowedt

4、hatcrosslinkdensity(XLD)ofNRvulcanizateswiththecuringsystemofsulfur／benzothiazolesulfonamide／zincoxide(ZnO)／Stearicacid(sA)wasproportionaltothedosageofsulfurandaccelerator；theadditionoftheZnOincreasedtheXLD，buttheSAshowe

5、dlittleeffectOilXLDTheNMRCDSresultsalsoshowedthattheXLDdecreasewhenthecuringtemperaturewastoohighTherelaxationparameterm)fromtheNMR—CDSdecreasedwiththeincreaseoftheXLDThedynamicpropeaiesofthespecimenmeasuredbyRPAresultss

6、howedthattheinfluenceofthedifferentrecipecomponentsonthedynamicpropertiesoftheNRcompoundweresimilarwhenthemixingconditionskeptconstantThedynamicmodulusoftheNRcompoundincreasedwithincreasingfrequencyanddecreasingtemperatu

7、re，butthelossfactor(tgS)decreased；whenthetearstrainsexceeded28％，thedynamicmodulusdecreasedsharplyThedependenceofdynamicpropertiesofNRvulcanizates011thetearfrequencytearstrainandtemperaturevariedwiththeXLDForthevulcanizat