简介：Thecompositiondistribution（CD）andmicroisotacticitydistribution（ID）ofpropene/1-hexenecopolymersynthesizedbyMgCl2/DIBP/TiCl4（DIBP:diisobutylphthalate）weredeterminedbyfractionatingthecopolymersaccordingtocrystallinityandcharacterizingthefractionsby13CNMR.Theeffectsoftwoalkoxysilanedonors,triethoxyphenylsilane（PTES）anddimethoxydi-tert-butylsilane（TBMS）,onCDandIDofthecopolymrswerecompared.ThreemainpartsintheCDdiagramofeachcopolymerweredistinguished,whichwerecorrelatedtoactivecenterdistribution（ACD）basedonthreegroupeofdif-ferentactivecenters.Bystudyingthechangesin1-hexenecontent,microisotacticityandreactivityratioproductofthreetypicalfractions,theeffectsofexternaldonoronACDwerebetterelucidated.ItwasfoundthatTBMSshowsmuchstrongereffectsonACDthanPTES.Intheformersystem,mostfractionswereproducedonactivecenterswithrelativelylowerr1r2,higherreactivityto1-hexene,andhigherstereospecificityascomparedtothesystemwithoutexternaldonor.ItisconcludedthattheobservedveryextensivechangesinACDaremainlyresultedbytheformationofnewtypesofactivecenters,possiblybycoordinationofexternaldonortocertainpositionsonthecatalyst.

简介：trans-1,4-polybutadiene-co-isoprene共聚物TBIR的二个系列用催化剂系统TiCl被准备<潜水艇class=“a-plus-plus”>4/MgCl2-Ali-Bu在不同反应温度的3。所有二和三个一组顺序分布，数字一般水准顺序长度和共聚物的顺序集中被计算根据<啜class=“a-plus-plus”>13C-NMR系列。温度和到到在TBIR共聚物的链片断的分发上的Ip的异戌二烯Bd的丁二烯的起始的臼齿的比率的影响被讨论。共聚物作文和热性质的关联也被评估，它便于由改变Bd内容和温度控制crystallinity和转变温度的度的理解。