Provided are a break-resistant copolymer having high transparency and heat resistance and also having a high tensile strain at break, and a molded article.
A copolymer contains 80% by mass to 98% by mass of structural units derived from a methacrylic ester monomer and 2% to 10% by mass of ester structural units derived from a cyclic ketene acetal monomer. The copolymer has a weight average molecular weight of 80, 000 or more and a molecular weight distribution of 1. 75 to 3.80.
本发明提供了一种具有高透明度和耐热性,同时具有高断裂拉伸应变的抗断裂共聚物,以及一种模塑制品。
一种共聚物含有 80%-98%(质量百分比)由
甲基丙烯酸酯单体衍生的结构单元和 2%-10%(质量百分比)由环烯酮
缩醛单体衍生的酯结构单元。共聚物的平均分子量为 80,000 或以上,分子量分布为 1.75 至 3.80。