Linear copolymers of alpha-olefins and divinylbenzene having narrow molecular weight and composition distributions, graft copolymers derived therefrom, and process for preparing same

摘要

The invention relates to polyolefin copolymers (I) chemistry chemdraw filechemistry mol file;and to graft copolymers (II) chemistry chemdraw filechemistry mol file;which are prepared from the copolymers (I), wherein the copolymers (I) are linear copolymers containing divinylbenzene comonomer units selected from the group consisting of 1,4-divinylbenzene units, mixtures of 1,4- and 1,3-divinylbenzene units and mixtures of 1,4-, 1,3- and 1,2-divinylbenzene units, wherein R, in formulas I and II, is a C₁ to C₁₀ linear or branched alkyl group or a C₆ to C₁₀ substituted or unsubstituted aromatic group; and wherein G and G′, independently, are selected from —H, —OH, epoxy, —NH₂, —COOH, anhydride, —Cl, —Br, —M, —COOM (M=metal) or a polymer chain having the molecular weight of at least about 500, which can be derived from both step and chain polymerization reactions. In the graft copolymer (II), the combined alpha-olefin mole % (x+y) is from about 50 and 99.9 mole %, the sum of x, y, m and n is 100%, n is at least 0.05%, and the backbone polymer chain has a number average molecular weight (Mn) of at least about 1,000.