The present disclosure provides a modified polyvinyl alcohol-based polymer, which comprises a modifying monomer unit represented by Formula ##STR00001## wherein, X is a moiety comprising an alkenyl group, and the modified polyvinyl alcohol-based polymer has a saponification degree of 67 mol % to 78 mol % and a modification rate of 0.02 mol % to 1.5 mol %. The modified polyvinyl alcohol-based polymer is suitable to be used as a dispersant for suspension polymerization, to make the obtained polyvinyl chloride-based resin have reduced particle diameter and few coarse particles.

The present disclosure provides a modified polyvinyl alcohol-based polymer, which comprises a modifying monomer unit represented by Formula ##STR00001## wherein, X is a moiety comprising an alkenyl group, and the modified polyvinyl alcohol-based polymer has a saponification degree of 67 mol % to 78 mol % and a modification rate of 0.02 mol % to 1.5 mol %. The modified polyvinyl alcohol-based polymer is suitable to be used as a dispersant for suspension polymerization, to make the obtained polyvinyl chloride-based resin have reduced particle diameter and few coarse particles.

Provided is a cell culture scaffold material having excellent cell adhesion. The cell culture scaffold material according to the present invention contains a peptide-conjugated polyvinyl alcohol derivative having a polyvinyl alcohol derivative portion and a peptide portion, and the peptide portion has a cyclic peptide skeleton.

Provided is a cell culture scaffold material having excellent cell adhesion. The cell culture scaffold material according to the present invention contains a peptide-conjugated polyvinyl alcohol derivative having a polyvinyl alcohol derivative portion and a peptide portion, and the peptide portion has a cyclic peptide skeleton.

The present invention relates to a modifier represented by Formula 1, a method of preparing the same, a modified conjugated diene-based polymer having a high modification ratio which includes a modifier-derived functional group, and a method of preparing the polymer.

The present invention relates to a modifier represented by Formula 1, a method of preparing the same, a modified conjugated diene-based polymer having a high modification ratio which includes a modifier-derived functional group, and a method of preparing the polymer.

The invention relates to a rubber composition which comprises an elastomer which is a copolymer of ethylene and of a 1,3-diene which comprises ethylene units which represent more than 50 mol % of the monomer units of the copolymer, the 1,3-diene being 1,3-butadiene or isoprene, 35 to 100 phr of a reinforcing filler which comprises a silica, a plasticizing system comprising a hydrocarbon plasticizing resin and a hydrocarbon liquid plasticizing agent, it being understood that the total content of hydrocarbon plasticizing resin and of hydrocarbon liquid plasticizing agent is greater than 10 phr and less than or equal to 80 phr. Such a composition confers on a tread of a tire an improved performance compromise between grip, roadholding and rolling resistance.

The invention relates to a rubber composition which comprises an elastomer which is a copolymer of ethylene and of a 1,3-diene which comprises ethylene units which represent more than 50 mol % of the monomer units of the copolymer, the 1,3-diene being 1,3-butadiene or isoprene, 35 to 100 phr of a reinforcing filler which comprises a silica, a plasticizing system comprising a hydrocarbon plasticizing resin and a hydrocarbon liquid plasticizing agent, it being understood that the total content of hydrocarbon plasticizing resin and of hydrocarbon liquid plasticizing agent is greater than 10 phr and less than or equal to 80 phr. Such a composition confers on a tread of a tire an improved performance compromise between grip, roadholding and rolling resistance.

A composition comprising at least one fluoropolymer and at least one solvent, wherein the solvent comprises a branched, partially fluorinated ether and wherein the partially fluorinated ether corresponds to the formula:
C.sub.pF.sub.2p+1—O—C.sub.qH.sub.2q+1
wherein q is an integer from 1 to and 5 and p is an integer from 5 to 11; and wherein the fluoropolymer is a copolymer comprising at least 90% by weight (based on the total weight of the polymer, which is 100% by weight) of units derived from tetrafluoroethene (TFE) and one or more perfluorinated alkyl ethers selected from ethers corresponding to the general formula
R.sub.f—O—(CF.sub.2).sub.n—CF═CF.sub.2
wherein n is 1 in which case the ether is an allyl ether, or 0 in which case the ether is a vinyl ether and R.sub.f represents a perfluoroalkyl residue which may be interrupted once or more than once by an oxygen atom. Also provided are methods of preparing the compositions and methods for coating substrate with the compositions.

A composition comprising at least one fluoropolymer and at least one solvent, wherein the solvent comprises a branched, partially fluorinated ether and wherein the partially fluorinated ether corresponds to the formula:
C.sub.pF.sub.2p+1—O—C.sub.qH.sub.2q+1
wherein q is an integer from 1 to and 5 and p is an integer from 5 to 11; and wherein the fluoropolymer is a copolymer comprising at least 90% by weight (based on the total weight of the polymer, which is 100% by weight) of units derived from tetrafluoroethene (TFE) and one or more perfluorinated alkyl ethers selected from ethers corresponding to the general formula
R.sub.f—O—(CF.sub.2).sub.n—CF═CF.sub.2
wherein n is 1 in which case the ether is an allyl ether, or 0 in which case the ether is a vinyl ether and R.sub.f represents a perfluoroalkyl residue which may be interrupted once or more than once by an oxygen atom. Also provided are methods of preparing the compositions and methods for coating substrate with the compositions.