The present disclosure relates to a resin that includes a first repeat unit as defined by Structure (I) ##STR00001##
where A is either a methyl group or a hydrogen atom, R.sup.1 is a first bridging group, and is a covalent bond.

Provided is a method of preparing a rubber composition, which includes (a) reacting a conjugated diene-based monomer with one or more of compounds in the presence of a first catalyst; (b) adding a conjugated diene-based monomer to a product of the step (a) and inducing a reaction; and (c) adding a second catalyst and a conjugated diene-based monomer to a product of the step (b) and inducing a reaction.

Provided is a method of preparing a rubber composition, which includes (a) reacting a conjugated diene-based monomer with one or more of compounds in the presence of a first catalyst; (b) adding a conjugated diene-based monomer to a product of the step (a) and inducing a reaction; and (c) adding a second catalyst and a conjugated diene-based monomer to a product of the step (b) and inducing a reaction.

This invention is in the field of medicinal chemistry. The present invention provides cell-laden hydrogels and hydrogel assemblies thereof for use in tissue engineering. The present invention provides methods of producing various hydrogels and hydrogel assemblies and pharmaceutical compositions thereof. The present invention provides for a microgel comprising an encapsulated population of live primary human cells in a hydrogel comprising a polymeric network.

This invention is in the field of medicinal chemistry. The present invention provides cell-laden hydrogels and hydrogel assemblies thereof for use in tissue engineering. The present invention provides methods of producing various hydrogels and hydrogel assemblies and pharmaceutical compositions thereof. The present invention provides for a microgel comprising an encapsulated population of live primary human cells in a hydrogel comprising a polymeric network.

A process for preparing an ethylene copolymer in the presence of free-radical polymerization initiator at pressures from 150 MPa to 350 MPa and temperatures from 100 C. to 350 C., by copolymerizing ethylene and a comonomer having a CC bond and optionally further comonomers, wherein the comonomer having the CC bond is represented by formula ##STR00001##
wherein R.sup.1 is hydrogen or methyl; X.sup.1 is COO or CONH; R.sup.2 is CH.sub.2O, OCO, Si(CH.sub.3).sub.2, Si(CH.sub.3).sub.2O or CR.sup.5R.sup.6 wherein R.sup.5 and R.sup.6 are independently selected from hydrogen, methyl, ethyl and hydroxyl;
n is an integer from 1 to 32 and R.sup.2 is same or different from each other when n is 2 to 32; and R.sup.3 is CC and R.sup.4 is hydrogen, C.sub.1-C.sub.10 linear or branched alkyl, C.sub.1-C.sub.10 linear or branched hydroxyalkyl or phenyl, or the unit R.sup.3-R.sup.4 stands for ##STR00002##
wherein X.sup.2 is F, Cl, Br or I.

A process for preparing an ethylene copolymer in the presence of free-radical polymerization initiator at pressures from 150 MPa to 350 MPa and temperatures from 100 C. to 350 C., by copolymerizing ethylene and a comonomer having a CC bond and optionally further comonomers, wherein the comonomer having the CC bond is represented by formula ##STR00001##
wherein R.sup.1 is hydrogen or methyl; X.sup.1 is COO or CONH; R.sup.2 is CH.sub.2O, OCO, Si(CH.sub.3).sub.2, Si(CH.sub.3).sub.2O or CR.sup.5R.sup.6 wherein R.sup.5 and R.sup.6 are independently selected from hydrogen, methyl, ethyl and hydroxyl;
n is an integer from 1 to 32 and R.sup.2 is same or different from each other when n is 2 to 32; and R.sup.3 is CC and R.sup.4 is hydrogen, C.sub.1-C.sub.10 linear or branched alkyl, C.sub.1-C.sub.10 linear or branched hydroxyalkyl or phenyl, or the unit R.sup.3-R.sup.4 stands for ##STR00002##
wherein X.sup.2 is F, Cl, Br or I.

A process for preparing an ethylene copolymer in the presence of free-radical polymerization initiator at pressures from 150 MPa to 350 MPa and temperatures from 100 C. to 350 C., by copolymerizing ethylene and a comonomer having a CC bond and optionally further comonomers, wherein the comonomer having the CC bond is represented by formula ##STR00001##
wherein R.sup.1 is hydrogen or methyl; X.sup.1 is COO or CONH; R.sup.2 is CH.sub.2O, OCO, Si(CH.sub.3).sub.2, Si(CH.sub.3).sub.2O or CR.sup.5R.sup.6 wherein R.sup.5 and R.sup.6 are independently selected from hydrogen, methyl, ethyl and hydroxyl;
n is an integer from 1 to 32 and R.sup.2 is same or different from each other when n is 2 to 32; and R.sup.3 is CC and R.sup.4 is hydrogen, C.sub.1-C.sub.10 linear or branched alkyl, C.sub.1-C.sub.10 linear or branched hydroxyalkyl or phenyl, or the unit R.sup.3-R.sup.4 stands for ##STR00002##
wherein X.sup.2 is F, Cl, Br or I.

The present disclosure relates to a process for preparing polymer and carbon nanospheres. In particular, the present disclosure is directed to preparing polymer nanospheres by catalytic emulsion or dispersion polymerization.

The present disclosure relates to a process for preparing polymer and carbon nanospheres. In particular, the present disclosure is directed to preparing polymer nanospheres by catalytic emulsion or dispersion polymerization.