Provided are a block copolymer including a polymer block containing acrylonitrile or methacrylonitrile as a principal constituent, which is excellent in heat resistance, weatherability, oil resistance, flame retardancy, and low-temperature resistance and which can be economically produced; and a thermoplastic resin composition and an elastomer composition each containing the block copolymer. The block copolymer is produced by reversible addition-fragmentation chain transfer polymerization in the presence of a thiocarbonylthio group-containing compound.
本文提供了一种嵌段共聚物,包括以
丙烯腈或
甲基丙烯腈为主要成分的聚合物嵌段,该嵌段具有优异的耐热性、耐候性、耐油性、阻燃性和耐低温性,并且可以经济地生产;以及一种热塑性
树脂组合物和一种弹性体组合物,每种组合物都含有该嵌段共聚物。嵌段共聚物是在含
硫代羰基硫代化合物存在下,通过可逆加成-断裂链转移聚合反应制得的。