| 摘要 |
PROBLEM TO BE SOLVED: To provide an aliphatic polycarbonate polymer excellent in heat resistance and transparency and having good mechanical properties and melt properties. SOLUTION: The aliphatic polycarbonate polymer, with a weight-average molecular weight(Mw) of 5,000-200,000, is composed of polycarbonate units(p) each represented by the general formula(1)(wherein, X<SB>1</SB>and X<SB>2</SB>are same or different and each O, N-R<SB>7</SB>or S; R<SB>1</SB>and R<SB>2</SB>are each a 1-10C alkylene chain; R<SB>3</SB>to R<SB>7</SB>are each H or a 1-10C alkyl, cycloalkyl or phenyl; and Z<SB>1</SB>and Z<SB>2</SB>are each a unit derived from a (poly)ester containing units derived from lactic acid and/or glycolic acid). A molded form made from this polycarbonate polymer is also provided. COPYRIGHT: (C)2007,JPO&INPIT
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