A method for producing a film includes: coating a surface of a substrate with a composition containing a polymer having a structural unit represented by formula (1) and having a number average molecular weight of 13000 or more and a solvent, heating a coating film formed by the coating, and removing, with a rinsing liquid, a part of the coating film after the heating, wherein the rinsing liquid to be used contains a basic compound. In the formula (1), Y.sup.1 is a single bond, —CO—NR.sup.2—, a divalent aromatic ring group, a divalent group containing —O—, or a divalent group containing —CO—NR.sup.2—. A.sup.1 is a single bond, —O—, —S—, or —NR.sup.3—. R.sup.1 is a hydrogen atom, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, or a monovalent group having a heterocyclic structure.

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A binder composition for a non-aqueous secondary battery contains specific polymer particles. The polymer particles contain a polymer 1 that is a block polymer including an acidic group-containing monomer unit and a polymer 2 that does not include an acidic group-containing monomer unit. The polymer 1 constitutes a proportion of not less than 10 mass % and not more than 90 mass % in the polymer particles. The polymer 2 includes either or both of an aliphatic conjugated diene monomer unit and an alkylene structural unit. The aliphatic conjugated diene monomer unit and the alkylene structural unit constitute a total proportion of 55 mass % or more based on the total mass of all repeating units included in the polymer 2.

Polymer compositions comprising stiff and tough star shaped styrene butadiene block-copolymers A1 and A2 can be used for making shrink films. Block copolymer A2 preferably has the structure

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with hard blocks S.sub.e and S.sub.i, hard random copolymer blocks (B/S).sub.Ae, soft random copolymer blocks (B/S).sub.B coupled by a coupling agent X.

A method of preparing high molecular weight poly(meth)acrylate polymers having narrow polydispersity indices (PDIs) by coupling poly(meth)acrylate building block units which themselves have narrow PDIs. The building block units have halogenated terminations, which when reacted with selected coupling agents, from the high molecular weight poly(meth)acrylate polymers.

The electrochemical energy conversion system of the present disclosure includes an anode, a cathode, and an ion exchange membrane including a polymer having an aromatic polymer chain and an alkylated substrate including an alkyl chain, and at least one ionic group. The alkylated substrate is bound to at least one aromatic group in the polymer chain via Friedel-Crafts alkylation of the at least one aromatic group. The alkylation reaction utilizes a haloalkylated tertiary alcohol or a haloalkylated alkene as a precursor. In the presence of an acid catalyst, a carbocation is generated in the precursor which reacts with the aromatic rings of the polymer chain. The at least one ionic group is then replaced with a desired cationic or anionic group using a substitution reaction. The membranes exhibit advantageous stability achieved through a simplified and scalable reaction scheme.

The electrochemical energy conversion system of the present disclosure includes an anode, a cathode, and an ion exchange membrane including a polymer having an aromatic polymer chain and an alkylated substrate including an alkyl chain, and at least one ionic group. The alkylated substrate is bound to at least one aromatic group in the polymer chain via Friedel-Crafts alkylation of the at least one aromatic group. The alkylation reaction utilizes a haloalkylated tertiary alcohol or a haloalkylated alkene as a precursor. In the presence of an acid catalyst, a carbocation is generated in the precursor which reacts with the aromatic rings of the polymer chain. The at least one ionic group is then replaced with a desired cationic or anionic group using a substitution reaction. The membranes exhibit advantageous stability achieved through a simplified and scalable reaction scheme.

The present disclosure provides a composite particle that includes: a fluorescent semiconductor core/shell nanoparticle (preferably, nanocrystal); and a stabilizing homo-copolymer combined with the core/shell nanoparticle, the stabilizing (co)polymer comprising styrene monomer units and functionalized with phosphine, arsine or stibine groups.

A method for producing a film includes: coating a surface of a substrate with a composition containing a polymer having a structural unit represented by formula (1) and having a number average molecular weight of 13000 or more and a solvent, heating a coating film formed by the coating, and removing, with a rinsing liquid, a part of the coating film after the heating, wherein the rinsing liquid to be used contains a basic compound. In the formula (1), Y.sup.1 is a single bond, —CO—NR.sup.2—, a divalent aromatic ring group, a divalent group containing —O—, or a divalent group containing —CO—NR.sup.2—. A.sup.1 is a single bond, —O—, —S—, or —NR.sup.3—. R.sup.1 is a hydrogen atom, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, or a monovalent group having a heterocyclic structure. ##STR00001##

Polymer compositions comprising styrene butadiene block-copolymers (SBC) can be used for shrink-wrap films, a stiff star-shaped SBC block copolymer A having two short branches of a single copolymer block (B/S).sub.Ai and two long branches of the structure S.sub.t-[(B/S).sub.A].sub.n-(B/S).sub.Ai or [(B/S).sub.A].sub.n-(B/S).sub.Ai are used in said polymer composition, and the production of shrink-wrap films and of multilayer films is described.

A coupled block copolymer composition with a combination of high viscosity at manufacturing, finishing and handling conditions, low viscosity at asphalt blending conditions and suitable viscosity stability is provided for use in asphalt compositions. The composition comprises: (i) a diblock copolymer, (ii) at least a linear triblock copolymer having a peak molecular weight that is 1.5 to 3.0 times the peak molecular weight of the diblock copolymer, and (iii) at least a multiarm coupled block copolymer having a peak molecular weight that is 1.5 to 9.0 times the peak molecular weight of the diblock copolymer, and mixtures thereof. The block copolymer composition is characterized as having a melt viscosity at 110 C. or less of greater than 2.0E7 Poise and a coupling efficiency after 24 hours at 180 C. is less than 25%.