文献类型：期刊文献

中文题名：新型双核FI/α-二亚胺镍(Ⅱ)催化体系制备聚乙烯-b-聚(乙烯/1-辛烯)嵌段共聚物

英文题名：Polyethylene-b-poly(ethylene/1-octene)Block Copolymer Prepared via Novel Dinuclear FI/Nickel(Ⅱ)α-Diiminecatalytic Systems

作者：张艺镡[1];王梦雪[1];张哲源[1];米普科[1];王婷兰[1]

机构：[1]华东理工大学材料科学与工程学院,上海先进聚合物材料重点实验室,超细材料制备与应用教育部重点实验室,上海200237

年份：2017

卷号：38

期号：8

起止页码：1497

中文期刊名：高等学校化学学报

外文期刊名：Chemical Journal of Chinese Universities

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：国家重点研发计划项目(批准号:2017YFB0306701);上海市重点学科和重点实验室项目(批准号:B502,08DZ2230500)资助

语种：中文

中文关键词：嵌段共聚物;α-二亚胺镍(Ⅱ)催化剂;苯氧基亚胺型过渡金属催化剂;链穿梭聚合

外文关键词：Block copolymer;Nickel(Ⅱ)a-diimine catalyst;Phenoxyimine zirconium catalyst;Chain shutt-ling polymerization

摘要：合成了新型双核苯氧基亚胺锆催化剂(Cat B),并与α-二亚胺镍(Ⅱ)催化剂(CatA)构成催化体系,在助催化剂甲基烷氧铝(MAO)及链穿梭剂二乙基锌(ZnEt_2)作用下催化乙烯与1-辛烯共聚,制备了聚乙烯-b-聚(乙烯/1-辛烯)嵌段共聚物.采用差示扫描量热法(DSC)、傅里叶变换红外光谱(FTIR)及碳核磁共振波谱(13C NMR)等方法对聚乙烯-b-聚(乙烯/1-辛烯)嵌段共聚物进行表征.结果表明,在甲苯作溶剂的1.0 MPa和50℃条件下,MAO和金属活性中心的摩尔比为300∶1;1-辛烯加入量为0.58 mol/L时,CatB/CatA/ZnEt_2催化体系制备的产物中1-辛烯插入率为4.9%,DSC出现双峰,"软段"部分在聚合物链段中分布较为集中.
A novel dinuclear phenoxyimine zirconium catalyst(CatB)was synthesized and constituted catalytic system with nickel(Ⅱ)a-diimine catalyst(CatA).The catalytic system was used for the preparation of polyethylene-b-poly(ethylene/1-octene)copolymer in the presence of co-catalyst(MAO)and chain shuttling agent diethylzinc(ZnEt2).Polymer structure was characterized by differential scanning calorimetry(DSC),Fourier transform infrared spectrophotometer(FTIR)and carbon nuclear magnetic resonance(13C NMR).The results showed that under the same condition:toluene as solvent,pressure 1.0 MPa,temperature 50℃,n(MAO)/n(CatA+CatB)=300:1,c(1-octene)=0.58mol/L,the insert amount of 1-octene on copolymer was 4.9%.The DSC curve presented bimodal profile and the"soft"segment of the products was more concentrated.