This invention relates to poly(acrylonitrile) homo- or co-polymer having a number average molecular weight (M.sub.n) of at least 200,000 g/mol and a dispersity () of less than 1.3.

Provided is a composition for sealing a covered wire, the composition containing 2-cyanoacrylate including 10% by mass or more of an alkyl-2-cyanoacrylate that has, in a main chain, an alkyl group having 4 or more carbon atoms, and the composition having both water resistance and thermal shock resistance under high temperature and high humidity conditions and also having excellent heat resistance.

Provided is a composition for sealing a covered wire, the composition containing 2-cyanoacrylate including 10% by mass or more of an alkyl-2-cyanoacrylate that has, in a main chain, an alkyl group having 4 or more carbon atoms, and the composition having both water resistance and thermal shock resistance under high temperature and high humidity conditions and also having excellent heat resistance.

This invention relates to poly(acrylonitrile) homo- or co-polymer having a number average molecular weight (Mn) of at least 200,000 g/mol and a dispersity () of less than 1.3.

A product, in accordance with one aspect of the present invention, includes a resin for three-dimensional printing, the resin including a photo-curable nitrile-containing photopolymer. A method for manufacturing an article of manufacture, in accordance with another aspect of the present invention, includes forming a three-dimensional (3D) structure from a photo-curable nitrile-containing photopolymer via a light-based printing process, and thermally processing the 3D structure for rendering the 3D structure electrically conductive.