| abstract |
A novel polymer having a high glass transition temperature and excellent performance balance of heat resistance, high refractive index and mechanical properties, and a composition and a molded article using the polymer. The polymer according to the present invention comprises a first structural unit represented by at least one of the following formulas (1-1), (1-2) and (1-3), and a second structural unit represented by any one of a secondary amino structure and a tertiary amino structure And a second structural unit provided at two or more ends thereof. |