Provided is a zwitterionic polymer that has a zwitterion that includes an effect of improving the stability of proteins. This zwitterionic polymer is a polymeric protein stabilizer that exhibits a protein stabilizing effect even at a small addition amount of addition, and at the same time has an antioxidant capability. Also provided is a method for producing this zwitterionic polymer. This problem is solved by a zwitterionic polymer containing a repeating unit represented by formula (1) and having a number-average molecular weight of 1,000 to 1,000,000. On formula (1), R.sup.1 and R.sup.2 are each independently selected from a hydrogen atom; linear, branched or cyclic alkyl groups having 1 to 6 carbons; aromatic groups having 6 to 20 carbons; or alkylene groups having 1 to 6 carbons and formed by linking R.sup.1 to R.sup.2. R.sup.3 represents a hydrogen atom or a methyl group).

Provided is a zwitterionic polymer that has a zwitterion that includes an effect of improving the stability of proteins. This zwitterionic polymer is a polymeric protein stabilizer that exhibits a protein stabilizing effect even at a small addition amount of addition, and at the same time has an antioxidant capability. Also provided is a method for producing this zwitterionic polymer. This problem is solved by a zwitterionic polymer containing a repeating unit represented by formula (1) and having a number-average molecular weight of 1,000 to 1,000,000. On formula (1), R.sup.1 and R.sup.2 are each independently selected from a hydrogen atom; linear, branched or cyclic alkyl groups having 1 to 6 carbons; aromatic groups having 6 to 20 carbons; or alkylene groups having 1 to 6 carbons and formed by linking R.sup.1 to R.sup.2. R.sup.3 represents a hydrogen atom or a methyl group).

The present invention relates to a modification polymerization initiator and a method for preparing the same, and the modification polymerization initiator includes a derived unit from a compound represented by Formula 1 and may include various functional groups in a molecule, and thus, may initiate polymerization reaction and introduce a functional group into a polymer chain at the same time.

A star block copolymer and a thermoplastic elastomer including plurality of the star block copolymers and a method of making both is taught. The star block copolymers of the present invention include a core component having a styrene oligomer wherein arms emanate from the core component and the arms are poly(isobutylene-block-styrene) diblock copolymers.

A star block copolymer and a thermoplastic elastomer including plurality of the star block copolymers and a method of making both is taught. The star block copolymers of the present invention include a core component having a styrene oligomer wherein arms emanate from the core component and the arms are poly(isobutylene-block-styrene) diblock copolymers.

A modified polymethylhydrosiloxane, a terminal modified conjugated diene-vinyl aromatic hydrocarbon copolymer and a synthesis method for which, a rubber composition and a tire are provided. The modified polymethylhydrosiloxane includes a compound represented by a formula (1). ##STR00001##
E is a moiety containing an epoxide group. T is a moiety containing an alkoxysilylalkyl group. A is selected from the group consisting of hydrogen, a moiety containing an alkyl group and a moiety containing an amino group. B is a moiety containing an aryl group. G is a moiety containing an ethyleneoxy group and an alkoxy group. J is a moiety containing an ethyleneoxy group and a hydroxyl group. e=5-45. t=1-4. a+b+g+j is equal to 1 to 595.

A modified polymethylhydrosiloxane, a terminal modified conjugated diene-vinyl aromatic hydrocarbon copolymer and a synthesis method for which, a rubber composition and a tire are provided. The modified polymethylhydrosiloxane includes a compound represented by a formula (1). ##STR00001##
E is a moiety containing an epoxide group. T is a moiety containing an alkoxysilylalkyl group. A is selected from the group consisting of hydrogen, a moiety containing an alkyl group and a moiety containing an amino group. B is a moiety containing an aryl group. G is a moiety containing an ethyleneoxy group and an alkoxy group. J is a moiety containing an ethyleneoxy group and a hydroxyl group. e=5-45. t=1-4. a+b+g+j is equal to 1 to 595.

The disclosure generally relates to lipid nanodiscs, in particular to lipid nanodiscs formed from polymers. A lipid nanodisc according to the disclosure includes a lipid bilayer having a first hydrophilic face and a second hydrophilic face opposing the first hydrophilic face, and a hydrophobic edge between the opposing hydrophilic faces, and a polymer encircling the hydrophobic edge of the lipid bilayer. The polymer includes a first monomeric unit having a pendant hydrophobic group and a second monomeric unit having a backbone hydrophilic group. Methods of making and characterizing the lipid nanodiscs are also disclosed.

The disclosure generally relates to lipid nanodiscs, in particular to lipid nanodiscs formed from polymers. A lipid nanodisc according to the disclosure includes a lipid bilayer having a first hydrophilic face and a second hydrophilic face opposing the first hydrophilic face, and a hydrophobic edge between the opposing hydrophilic faces, and a polymer encircling the hydrophobic edge of the lipid bilayer. The polymer includes a first monomeric unit having a pendant hydrophobic group and a second monomeric unit having a backbone hydrophilic group. Methods of making and characterizing the lipid nanodiscs are also disclosed.

Polar silane linkers are provided that attach to resins to form silane-functionalized resins. The functionalized resins can be bound to hydroxyl groups on the surface of silica particles to improve the dispersibility of the silica particles in rubber mixtures. Further disclosed are synthetic routes to provide the silane-functionalized resins, as well as various uses and end products that benefit from the unexpected properties of the silane-functionalized resins. Silane-functionalized resins impart remarkable properties on various rubber compositions, such as tires, belts, hoses, brakes, and the like. Automobile tires incorporating the silane-functionalized resins are shown to possess excellent results in balancing the properties of rolling resistance, tire wear, and wet braking performance.