Characteristics of silica-supported tin(II) methoxide catalysts for ring-opening polymerization (ROP) of L-lactide

Autor:	Eunju Lee, Sung-Cheol Yoon, Kang Moon Lee, Jinhee Jang, Youngkyu Do, Seung Young Park, Eonah Kim, Jin Suk Chung
Rok vydání:	2014
Předmět:	Lactide Process Chemistry and Technology chemistry.chemical_element Homogeneous catalysis Methoxide Heterogeneous catalysis Ring-opening polymerization Catalysis chemistry.chemical_compound chemistry Alkoxide Polymer chemistry Physical and Theoretical Chemistry Tin
Zdroj:	Journal of Molecular Catalysis A: Chemical. 385:68-72
ISSN:	1381-1169
DOI:	10.1016/j.molcata.2014.01.008
Popis:	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 °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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::52add4c19e0a40d62254df6032a72faa https://doi.org/10.1016/j.molcata.2014.01.008 Zobrazit plný text záznamu Full Text from ScienceDirect