Characteristics of heterogeneous titanium alkoxide catalysts for ring-opening polymerization of lactide to produce polylactide

被引：39
|
作者：
Kim, Eonah [1 ]
Shin, Eun Woo [1 ]
Yoo, Ik-Keun [1 ]
Chung, Jin Suk [1 ]
机构：
[1] Univ Ulsan, Sch Chem Engn & Bioengn, Ulsan 680749, South Korea
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2009年 / 298卷 / 1-2期
关键词：
Titanium alkoxide catalyst; Silica support; Polylactide; Ring-opening polymerization; COMPLEXES;
D O I：
10.1016/j.molcata.2008.09.029
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
TiCl(O-i-Pr)(3)/SiO2 and Ti(O-i-Pr)(4)/SiO2 were prepared by immobilizing titanium(]V) chloride triisopropoxide (TiCl(O-i-Pr)(3)) and titanium(IV) tetraisopropoxide (Ti(O-i-Pr)(4), respectively, over pretreated silica. A series of solution polymerizations Of L-lactide were conducted with homogeneous alkoxide catalysts and silica-supported titanium alkoxide catalysts to compare their catalytic activity and the characteristics of the polylactide (PLA) produced. The conversion Of L-lactide with the silica-supported alkoxide catalysts was higher than that with homogeneous catalysts even though the catalyst activity was low. In addition, the PLA produced using silica-supported alkoxide catalysts had a higher molecular weight and T than those produced with the homogeneous catalyst. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：36 / 39
页数：4
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