The invention relates to a polyacrylate-based graft copolymer comprising a polyacrylate backbone and polyolefin side chains grafted thereon, wherein the graft copolymer is prepared by reacting a first polymer and a second polymer, wherein the first polymer comprises recurring units having the structure (I) and optionally further recurring units having the structures (II): Formulae (I), (II) wherein R.sup.1, R.sup.3 is H or CH.sub.3 and R.sup.2 is a hydrocarbon moiety comprising 1 to 6 carbon atoms, one of R.sup.4 and R.sup.5 is H and the other one of R.sup.5 and R.sup.4 is COOR.sup.2, C═N, Cl, or an aliphatic or aromatic hydrocarbon moiety optionally containing one or multiple hetero atom functionalities, wherein R.sup.2 in (I) is different from R.sup.2 in (II) and the second polymer is a functionalized polyolefin having one or multiple hydroxyl functional groups, wherein the graft copolymer is formed by transesterification of the COOR.sup.2 group of (1) or (II) with the hydroxyl functional group of the functionalized polyolefin.

A block copolymer is provided that includes a first block having pendant phosphorus-containing groups and a second block having fluorinated groups. Compositions containing the block copolymer as well as articles that include the block copolymer are also provided. The block copolymer can be used to provide a lower surface energy to a surface, particularly a metal-containing surface.

An immersion-molded body, wherein: the immersion-molded body is obtained using a latex; the latex comprises a chloroprene-based block copolymer; the chloroprene-based block copolymer contains 5 to 30% by mass of a polymer block (A) and 70 to 95% by mass of a chloroprene-based polymer block (B); the polymer block (A) is derived from a monomer; when the monomer is polymerized alone, a polymer with a glass transition temperature of 80° C. or higher can be obtained; the chloroprene-based polymer block (B) includes a chloroprene monomer unit; and when the immersion-molded body is heat-treated at 130° C. for 30 minutes, a tensile strength at break of the heat-treated immersion-molded body measured in accordance with JIS K6251 is 17 MPa or more.

Described herein are therapeutic pH responsive compositions comprising a block copolymer and a therapeutic agent useful for the treatment of cancer.

A block copolymer (A) including a vinyl alcohol-based polymer block (b) and an ionic polymer block (c) containing a monomer unit with an ionic group forming a salt and a vinyl alcohol-based monomer unit. The ionic group is a carboxylic acid group, a sulfonic acid group, or an ammonium group. The vinyl alcohol-based polymer block (b) has a number-average molecular weight (Mn.sub.b) from 15,000 to 220,000. The ionic polymer block (c) has a content of the vinyl alcohol-based monomer unit from 5 to 95 mol % based on the total monomer units. The block copolymer (A) has a number-average molecular weight (Mn.sub.A) from 20,000 to 440,000. A ratio (Mn.sub.b/Mn.sub.A) of the number-average molecular weight (Mn.sub.b) to the number-average molecular weight (Mn.sub.A) is from 0.1 to 0.9.

The present invention relates to a method for the preparation of a synthetic rubber blend, wherein the blend comprises a high molecular weight polydiene (A) and a low molecular weight polydiene (B). The present invention further relates to a synthetic rubber blend obtainable according to the method described herein; as well as to rubber compositions comprising the blend; and articles, such as tires.

A polymer composition comprising a star-branched copolymer having a plurality of arms is disclosed. Each polymer arm has a molecular weight Mp of from 1 kg/mol to 50 kg/mol and comprises polymerized units (i) derived from a first vinyl aromatic monomer comprising a radical-reactive group, wherein from greater than 10 mol % to 100 mol % of the units (i) are unhydrogenated; and optionally, polymerized units (ii) comprising hydrogenated and unhydrogenated forms of polymerized units derived from a high Tg monomer, and hydrogenated form of polymerized units (i) or hydrogenated form of polymerized styrene units; and optionally, polymerized units (iii) comprising (a) hydrogenated form of polymerized units derived from one or more acyclic conjugated dienes, and (b) polymerized units derived from one or more of a second vinyl aromatic monomer; wherein less than 10 wt. % of units (a) are unhydrogenated.

The present invention relates to a method of synthesizing hydrocarbon polymers using a deoxygenation reaction, wherein, by deoxygenating polymers including oxygen atom-containing functional groups in side chains thereof to thereby remove the functional groups of the side chains, various block copolymers including polyolefins and hydrocarbon polymers with complex architectures can be synthesized.

A polymeric surfactant for use in chemical enhanced oil recovery, including a terpolymer of a first non-ionic monomer, a second non-ionic monomer, and an ionic monomer, the first non-ionic monomer being a hydrophilic monomer and the second non-ionic monomer being a hydrophobic monomer, the ionic monomer being in a lower proportion than the first and second non-ionic monomers. A method of preparation of polymeric surfactants.

The invention relates to methods of lubricating biological tissue, such as joints, bone, ocular tissue, nasal tissue, tendons, tendon capsule, and vaginal tissue, by contacting the biological tissue with an effective amount of a block copolymer lubricating composition which functions at least or better than lubricin. In particular embodiments, the method is used to treat osteoarthritis. In specific embodiments, the block copolymer has an ammonium-containing polymer block and a non-ionic hydrophilic polymer block, or the copolymer has a carboxylic acid-containing polymer block and a non-acid non-ionic hydrophilic polymer block.