The present invention provides a catalyst composition including a functionalizing agent of the following Formula 1 together with a rare earth metal compound, an alkylating agent, and a halogen compound, having good catalytic activity and polymerization reactivity and useful for the preparation of a conjugated diene-based polymer having high linearity and excellent processability, and a conjugated diene-based polymer prepared using the catalyst composition.
(X.sub.1).sub.aN(X.sub.2).sub.3-a[Formula 1] In Formula 1, a, X.sub.1, and X.sub.2 are the same as defined in the disclosure.

The present invention provides a catalyst composition including a functionalizing agent of the following Formula 1 together with a rare earth metal compound, an alkylating agent, and a halogen compound, having good catalytic activity and polymerization reactivity and useful for the preparation of a conjugated diene-based polymer having high linearity and excellent processability, and a conjugated diene-based polymer prepared using the catalyst composition.
(X.sub.1).sub.aN(X.sub.2).sub.3-a[Formula 1] In Formula 1, a, X.sub.1, and X.sub.2 are the same as defined in the disclosure.

The present invention provides a catalyst composition including a functionalizing agent of the following Formula 1 together with a rare earth metal compound, an alkylating agent, and a halogen compound, having good catalytic activity and polymerization reactivity and useful for the preparation of a conjugated diene-based polymer having high linearity and excellent processability, and a conjugated diene-based polymer prepared using the catalyst composition.
(X.sub.1).sub.a-M.sub.1-([Y-M.sub.2-(X.sub.2).sub.n-1]).sub.m-a[Formula 1] In Formula 1, a, m, n, M.sub.1, M.sub.2, X.sub.1, X.sub.2 and Y are the same as defined in the disclosure.

The present invention provides a catalyst composition including a functionalizing agent of the following Formula 1 together with a rare earth metal compound, an alkylating agent, and a halogen compound, having good catalytic activity and polymerization reactivity and useful for the preparation of a conjugated diene-based polymer having high linearity and excellent processability, and a conjugated diene-based polymer prepared using the catalyst composition.
(X.sub.1).sub.a-M.sub.1-([Y-M.sub.2-(X.sub.2).sub.n-1]).sub.m-a[Formula 1] In Formula 1, a, m, n, M.sub.1, M.sub.2, X.sub.1, X.sub.2 and Y are the same as defined in the disclosure.

The present invention provides a catalyst composition including a functionalizing agent of the following Formula 1 together with a rare earth metal compound, an alkylating agent, and a halogen compound, having good catalytic activity and polymerization reactivity and useful for the preparation of a conjugated diene-based polymer having high linearity and excellent processability, and a conjugated diene-based polymer prepared using the catalyst composition.
(X.sub.1).sub.aSn(X.sub.2).sub.4-a[Formula 1] In Formula 1, a, X.sub.1, and X.sub.2 are the same as defined in the disclosure.

The present invention provides a catalyst composition including a functionalizing agent of the following Formula 1 together with a rare earth metal compound, an alkylating agent, and a halogen compound, having good catalytic activity and polymerization reactivity and useful for the preparation of a conjugated diene-based polymer having high linearity and excellent processability, and a conjugated diene-based polymer prepared using the catalyst composition.
(X.sub.1).sub.aSn(X.sub.2).sub.4-a[Formula 1] In Formula 1, a, X.sub.1, and X.sub.2 are the same as defined in the disclosure.

New monomer and polymer materials that comprise one or more Te atoms. In one aspect, tellurium-containing monomers and polymers are provided that are useful for Extreme Ultraviolet Lithography.

New monomer and polymer materials that comprise one or more Te atoms. In one aspect, tellurium-containing monomers and polymers are provided that are useful for Extreme Ultraviolet Lithography.

Elastomeric polyolefin-based ionomers and methods for making same. The ionomers can include a copolymer comprising: C.sub.2-C.sub.60 -olefin monomer units; optional C.sub.2-C.sub.60 -olefin comonomer units different than the monomer units; optional diene units; and about 0.1 wt % to about 20 wt % metal alkenyl units, based on the weight of the copolymer, wherein the metal alkenyl units have the formula R(A), wherein R is an alkyl group containing 2 to 10 carbon atoms, and A is an anionic group. The copolymer can further include one or more metal cations derived from the group consisting of alkali metals, alkaline earth metals, group 3-12 metals, group 13-16 metals, and combination(s) thereof. The ionomer has a glass transition temperature of 60 C. to 5 C., and a weight average (Mw) of 50 to 5,000 kg/mol.

Elastomeric polyolefin-based ionomers and methods for making same. The ionomers can include a copolymer comprising: C.sub.2-C.sub.60 -olefin monomer units; optional C.sub.2-C.sub.60 -olefin comonomer units different than the monomer units; optional diene units; and about 0.1 wt % to about 20 wt % metal alkenyl units, based on the weight of the copolymer, wherein the metal alkenyl units have the formula R(A), wherein R is an alkyl group containing 2 to 10 carbon atoms, and A is an anionic group. The copolymer can further include one or more metal cations derived from the group consisting of alkali metals, alkaline earth metals, group 3-12 metals, group 13-16 metals, and combination(s) thereof. The ionomer has a glass transition temperature of 60 C. to 5 C., and a weight average (Mw) of 50 to 5,000 kg/mol.