摘要 |
<p>The purpose of the invention is to provide a polyester carbonate copolymer with favorable optical properties and excellent hue and moldability. The invention is a polyester carbonate copolymer containing units represented by formula (I) and units represented by formula (II) and the proportion of phenyl termini with respect to all of the termini in the polymer is 30 mole% or less. (In formula (II), Y is a phenylene group or naphthalenediyl group.)</p> |