Abstract
Abstract Poly(l-phenyllactic acid)s (PlPhLAs) with high molecular weight were prepared by a direct polycondensation of l-phenyllactic acid in the presence of stable Lewis acids such as HfCl4·2THF under various reaction conditions. As a result, PlPhLAs with a number-average molecular weight (Mn) more than 100000 g mol−1 were obtained and showed specific optical rotation [α ]D25 of −46° and the glass-transition temperature (Tg) of 55 °C whose absolute values were higher than the reported values and was comparable with Tg of poly(l-lactic acid).
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