简介：Thisworkdealswiththekineticsofco-condensationpolymerizationofAB2andABmonomers,givingexpressionsofthetwo-dimensionalmolecularweightdistributionfunctionandthenumber/weightaveragemolecularweightsoftheresultingcopolymers.Thetwo-dimensionalmolecularweightdistributiondependsontwoindices,nandl,whicharetherespectivenumbersofAB2andABunitsinacopolymerspecies.Theevolutionofthetwo-dimensionalweightandzdistributionsduringtheco-condensationpolymerizationhasbeenevaluatedsystematically.Finally,thetwo-dimensionaldistributionwastransformedintoaone-dimensionalmolecularweightdistributionwithonlyonevariable(themolecularweightoftheproductsinsteadofthedegreeofpolymerization).Thecalculatedresultsshowthatthehighlybranchedcopolymerhasaverybroadmolecularweightdistributionwhentheco-condensationpolymerizationapproachescompletion.

简介：TheanalyticalexpressionsofthevariousstructuralunitsandtheaveragedegreeofbranchingforthehyperbranchedpolymersresultedfromAB_2polycondensationwithsubstitutioneffectwerederivedbythekineticmechanism.ThereactivitydifferencebetweentheBgroupinlinearunitandthatinterminalgrouphasgreateffectonthemolecularparametersoftheproductsobtained.TheconcentrationofterminalunitshasamaximumwiththeincreaseoftheconversionofAgroups(x).Thehigherthereactivityratio(r)oflinearBgrouptobranchedoneis,thelaterthemaximumappearsandthelargeritis.Thedegreeofbranchingofthehyperbranchedpolymersobtainediscontrollablebyadjustingtheparametersofrandx,whichincreaseswithincreasingbothxandr.