1-丁烯/1-辛烯共聚物的合成及其性能OA

A 1-butene/1-octene copolymer was prepared by homogeneous bulk polymerization using a novel Ziegler-Natta catalyst.The effects of 1-octene incorporation on the structure and crystal transformation behavior of polybutene-1(PB-1)were investigated by IR,13C NMR,DSC,and XRD.The experimental results demonstrate that the copolymerization activity of 1-butene and 1-octene reaches above 23 kg/(g·h),and the reactivity ratio is 1.837 and 0.629,respectively.The introduction of 1-octene leads to a decrease in the[mmmm]content in the copolymer,effectively reduces the melting point,enthalpy of fusion,and crystallization temperature of the copolymer,and inhibits the transformation of PB-1 from crystal form Ⅱ to crystal form Ⅰ.When the 1-octene content reaches 3.30%(x),the copolymer remains mainly in crystal form Ⅱ within 90 d of aging,and no significant crystal transformation is observed.