An object of the present disclosure is to provide a polymer exhibiting reduced heat generation in a low strain region. To achieve the object, the present disclosure provides a multi-component copolymer, comprising a non-conjugated olefin unit, a conjugated diene unit, and an aromatic vinyl unit, characterized in that: a ratio [(C.sub.100-120/C.sub.0-1000)×100] of crystallinity (C.sub.100-120) derived from the non-conjugated olefin unit at 100-120° C. with respect to crystallinity (C.sub.0-100) derived from the non-conjugated olefin unit at 0-100° C., as measured by a differential scanning calorimeter (DSC), is 23% or less.

An object of the present disclosure is to provide a method for manufacturing a copolymer, wherein a crystal content and a vinyl bond content (or a glass transition temperature) of the copolymer can be controlled. Specifically, the present disclosure provides a method for manufacturing a copolymer, wherein the method comprises a process of copolymerizing ethylene with isoprene under the presence of a polymerization catalyst composition containing a half metallocene cation complex represented by following general formula (I)

##STR00001##

(In formula (I), M represents a lanthanoid element, scandium or yttrium; Cp.sup.R′ represents substituted cyclopentadienyl, substituted indenyl or substituted fluorenyl; X represents hydrogen atom, halogen atom, alkoxy, thiolate, amide, silyl, or a C.sub.1-20 monovalent hydrocarbon group; L represents a neutral Lewis base; w represents an integer in the range of 0 to 3; and [B].sup.− represents a non-coordinating anion), wherein Cp.sup.R′ in general formula (I) has at least two substituent groups.

An object of the present disclosure is to provide a method for manufacturing a copolymer, wherein a crystal content and a vinyl bond content (or a glass transition temperature) of the copolymer can be controlled. Specifically, the present disclosure provides a method for manufacturing a copolymer, wherein the method comprises a process of copolymerizing ethylene with isoprene under the presence of a polymerization catalyst composition containing a half metallocene cation complex represented by following general formula (I)

##STR00001##

(In formula (I), M represents a lanthanoid element, scandium or yttrium; Cp.sup.R′ represents substituted cyclopentadienyl, substituted indenyl or substituted fluorenyl; X represents hydrogen atom, halogen atom, alkoxy, thiolate, amide, silyl, or a C.sub.1-20 monovalent hydrocarbon group; L represents a neutral Lewis base; w represents an integer in the range of 0 to 3; and [B].sup.− represents a non-coordinating anion), wherein Cp.sup.R′ in general formula (I) has at least two substituent groups.

This invention relates to a process to produce an ionomer comprising: 1) contacting, in a reactor, one or more C.sub.2-C.sub.60 α-olefins, an optional diene, and a metal alkenyl with a catalyst system comprising an activator, a catalyst compound, and a support; 2) forming a copolymer comprising one or more C.sub.2-C.sub.60 α-olefin monomers and about 0.01 wt % to about 20 wt %, based on the weight of the copolymer, of metal alkenyl; 3) functionalizing and quenching the polymerization reaction with one or more electrophilic groups; and 4) obtaining ionomer.

This invention relates to a process to produce an ionomer comprising: 1) contacting, in a reactor, one or more C.sub.2-C.sub.60 α-olefins, an optional diene, and a metal alkenyl with a catalyst system comprising an activator, a catalyst compound, and a support; 2) forming a copolymer comprising one or more C.sub.2-C.sub.60 α-olefin monomers and about 0.01 wt % to about 20 wt %, based on the weight of the copolymer, of metal alkenyl; 3) functionalizing and quenching the polymerization reaction with one or more electrophilic groups; and 4) obtaining ionomer.

This invention relates to polymers comprising: one or more that include 1) at least 11 wt % 4 substituted 1,4 hexadiene and less than 20 wt % 5-methyl-1,4-hexadiene, based upon the weight of the polymer, and 2) optionally, one or more olefins; and processes to produces such polymers using metallocene or post-metallocene catalyst compounds.

This invention relates to polymers comprising: one or more that include 1) at least 11 wt % 4 substituted 1,4 hexadiene and less than 20 wt % 5-methyl-1,4-hexadiene, based upon the weight of the polymer, and 2) optionally, one or more olefins; and processes to produces such polymers using metallocene or post-metallocene catalyst compounds.

The present disclosure relates to unsaturated polyolefins and processes for preparing the same. The present disclosure further relates to curable formulations comprising the unsaturated polyolefins that show improved crosslinking.

The present disclosure relates to unsaturated polyolefins and processes for preparing the same. The present disclosure further relates to curable formulations comprising the unsaturated polyolefins that show improved crosslinking.

The present invention disclosed a novel heterogeneous catalytic system (precatalyst), process for the preparation and use thereof for the synthesis of highly crystalline, disentangled ultra high molecular weight polyethylene (UHMWPE).