Synthesis of poly [(5-benzyloxy-trimethylene carbonate)-co-(5,5 dimethyl-trimethylene carbonate)] catalyzed by immobilized lipase on silica particles with different size

被引：44

作者：

He, F ^{[1
]}

Wang, YX ^{[1
]}

Feng, J ^{[1
]}

Zhuo, RX ^{[1
]}

Wang, XL ^{[1
]}

机构：

[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China

来源：

POLYMER | 2003年 / 44卷 / 11期

关键词：

enzymatic ring-opening co-polymerization; polycarbonates; immobilized enzyme;

D O I：

10.1016/S0032-3861(03)00227-1

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Porcine pancreas lipase (PPL) immobilized on silica particles with different size were prepared and employed successfully for ring-opening co-polymerization of 5-benzyloxy-trimethylene carbonate (BTMC) with 5,5-dimethyl-trimethylene carbonate (DTC) for the first time. Three kinds of silica particles with different sizes (150-250, 75-150 and 1 mum) were selected as carriers for enzyme immobilization. The structure of copolymers were confirmed by H-1 and C-13 NMR which showed no decarboxylation occurrence during the polymerization. The (M-n) of poly (BTMC-co-DTC) decreased rapidly with the increasing of immobilized PPL concentration. The carrier size of immobilized PPL affected both the catalytic activity and the polymer yield. The highest molecular weight (M-n = 26,400) of poly(BTMC-co-DTC) was obtained at around 0.1% concentration of immobilized PPL on silica particles with size of 75-150 mum. (C) 2003 Elsevier Science Ltd. All fights reserved.

引用

页码：3215 / 3219

页数：5

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