Provided herein are methods of formulating and engineering block copolymer (BCP) systems for directed self-assembly (DSA) processes. In some embodiments, the methods involve engineering a BCP material based on the interaction parameter () of the material and the surface and/or interaction energies of its constituent blocks. Also provided are novel block BCP materials that can be used in DSA techniques. In some embodiments, the BCP systems described herein have micro-phase separating blocks, with at least one block including multiple types of repeat units. Also provided are structures formed by DSA, including structures having a sub-20 nm dimension. Applications included nanolithography for semiconductor devices, fabrication of cell-based assays, nanoprinting, photovoltaic cells, and surface-conduction electron-emitter displays.

A method for preparing a coupled polymer, the method comprising the steps of (i) polymerizing monomer to form a reactive polymer, and (ii) reacting the reactive polymer with an imide compound containing an oxiranyl group.

The present invention provides a block copolymer composition capable of preventing a decrease in transparency of a resin to be obtained while maintaining a property of imparting impact resistance, in which a vinyl aromatic hydrocarbon monomer unit and a conjugated diene monomer unit are contained in a mass ratio of 70/30 to 50/50, and an active oxirane oxygen concentration calculated from an epoxy equivalent measured in accordance with JIS K7236: 2001 is 0.05 mass % to 0.5 mass %. The present invention also provides a block copolymer resin composition containing the block copolymer composition, and a molded article, a sheet and a film molded from a molding material containing the block copolymer resin composition.

The present invention provides a block copolymer composition capable of preventing a decrease in transparency of a resin to be obtained while maintaining a property of imparting impact resistance, in which a vinyl aromatic hydrocarbon monomer unit and a conjugated diene monomer unit are contained in a mass ratio of 70/30 to 50/50, and an active oxirane oxygen concentration calculated from an epoxy equivalent measured in accordance with JIS K7236: 2001 is 0.05 mass % to 0.5 mass %. The present invention also provides a block copolymer resin composition containing the block copolymer composition, and a molded article, a sheet and a film molded from a molding material containing the block copolymer resin composition.

The invention relates to a new and improved process for making an epoxidized olefin, specifically, polyisobutylene epoxide. The inventive process generally comprises (a) combining a polyisobutylene and a solvent to form a first mixture, (b) combining a peroxide, a carboxylic acid and an acid catalyst to form a second mixture, (c) reacting the first and second mixtures forming a non-aqueous phase comprising a polyisobutylene epoxide and an aqueous phase; (d) separating the non-aqueous phase from the aqueous phase; (d) washing and neutralizing the non-aqueous phase, and (e) recovering in a high yield and high purity polyisobutylene epoxide. It was discovered that specific mole ratios and amounts of reactants provide for recovering in high yield and purity polyisobutylene epoxide with reduced detrimental by-products.

The invention relates to a new and improved process for making an epoxidized olefin, specifically, polyisobutylene epoxide. The inventive process generally comprises (a) combining a polyisobutylene and a solvent to form a first mixture, (b) combining a peroxide, a carboxylic acid and an acid catalyst to form a second mixture, (c) reacting the first and second mixtures forming a non-aqueous phase comprising a polyisobutylene epoxide and an aqueous phase; (d) separating the non-aqueous phase from the aqueous phase; (d) washing and neutralizing the non-aqueous phase, and (e) recovering in a high yield and high purity polyisobutylene epoxide. It was discovered that specific mole ratios and amounts of reactants provide for recovering in high yield and purity polyisobutylene epoxide with reduced detrimental by-products.