Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume 385, Issue -, Pages 68-72Publisher
ELSEVIER
DOI: 10.1016/j.molcata.2014.01.008
Keywords
Tin methoxide catalyst; Silica support; Polylactide; Ring-opening polymerization; Separation of catalyst
Categories
Funding
- Industrial Strategic Technology Development Program - Ministry of Knowledge Economy, Republic of Korea [10031756]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10031756] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Supported Sn(OMe)(2) catalysts were prepared on pretreated silica with various tin contents. A series of bulk polymerizations of L-lactide were conducted with homogeneous methoxide catalyst and silica-supported tin alkoxide catalyst to compare with their characteristics of the polylactide (PLA) produced. The conversion of L-lactide with the silica-supported methoxide catalysts was higher than that with the homogeneous catalyst at each monomer/catalyst molar ratio. The highest catalytic conversion and propagation constant (k(p)) was achieved at 180 degrees C. The spent catalyst was successfully recovered up to 85% by simple filtration of the polymer product. The heterogeneous catalyst system is advantageous for recycling the catalyst and the production of highly purified, metal-free grade PLA. (C) 2014 Elsevier B.V. All rights reserved.
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