Comparedwithdiolefinerubber,EPDMhaslessdoublebond.
Dibenzylidenesorbitolisknownasagellingagentforpolyoleflnresin.
Theproducthasgoodcatalyticpropertyfortheformationofdienestereospecificpolymers.
Itiscausedbythepropertychangeoffeedstockinstorageprocessandalkadienepolymerization.
ThreeYuansecondgradethirdrubbers(EPDM)istheethylene,thepropyleneandthefewnon-conjugatediolefincopolymer.
Recentadvancesinringclosingmetathesis(RCM)reaction,includingolefinandenynemetathesisreactionarereviewed.
PASP-PEGblockstructurecopolymer,combshapedPASP-PEGblockstructurecopolymer,asparticacidandglycine,glutamicacidorpropalaninecopolymerareprepared.
Inthisthesis,thecarbozincationofacetylenicsulfonesanditsapplicationsinthestereoselectivesynthesisofpolysubstitutedolefinswereinvestigated.
Thebenzeneringandalkenestructuralgrouparemuchmorestablethanstructuralgroupofsulfoacidforthecarbonifyingprocessofpolystyrene.
Ethylphenylacrylateintermediatebringingadoublebondwasintroducedfirst,whichissubsequentlytransformedintotriketoneandthenDCMwasobtainedwithhighpurity.
Thediolefinsandalkenylaromaticsareveryunstablecomponentswhichcangivegumsbypolymerization.Ingivingolefinsandalkyaromaticsthehydrogenationimprovestheproductquality.
Thecatalystsusedtohydrogenatepolymercontainingpolydiolefinunitsareintroducedinthispaper.ThemechanismofSBShydrogenationandthedevelopmentofthekineticsarealsoreferredto.