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- W1168627075 abstract "为了制备高光学活性的聚乳酸，以D，L-乳酸为原料，熔融缩聚合成聚乳酸。采用旋光度法、红外光谱、差示扫描量热法、凝胶渗透色谱和核磁共振等方法研究了聚乳酸的结构和性能。结果表明：锡粉催化与自催化的D，L-乳酸聚合均可以得到较低分子质量、消旋的聚D，L-乳酸。SnCl2／对甲苯磺酸与SnCl2／邻甲苯磺酸两个催化体系都具有立构选择性，可以催化D，L-乳酸聚合制备L-构型的聚乳酸。立构选择性聚合所得的聚乳酸具有较高相对分子质量（Mr〉20000）、窄分布（分布指数1．1）、较高光学活性（比旋光度-109，光学纯度70．5％）和熔点（112℃）。" @default.
- W1168627075 created "2016-06-24" @default.
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- W1168627075 date "2008-06-18" @default.
- W1168627075 modified "2023-09-23" @default.
- W1168627075 title "D，L-乳酸的立构选择性聚合" @default.
- W1168627075 doi "https://doi.org/10.3969/j.jssn.1000-2006.2008.03.010" @default.
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