文章基本信息

标题：Selective Depolymerization and Effects of Homolysis of Poly(L-lactic acid) in a Blend with Polypropylene
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作者：Haruo Nishida ; Yoshiro Arazoe ; Takayuki Tsukegi 等
期刊名称：International Journal of Polymer Science
印刷版ISSN：1687-9422
电子版ISSN：1687-9430
出版年度：2009
卷号：2009
DOI：10.1155/2009/287547
出版社：Hindawi Publishing Corporation
摘要：Blends of poly(L-lactic acid) (PLLA) and polypropylene (PP), which are candidates for the practical use of PLLA, were investigated for selective degradation of PLLA, resulting in quantitative conversion of PLLA components into cyclic monomers, lactides, using magnesium oxide (MgO) as a depolymerization catalyst. Obviously, the catalyst MgO selectively accelerated only the PLLA depolymerization in the blends, dominantly generating L,L-lactide as a volatile product and separating the PP component. Expected effects of homolysis in the blend system were also determined as slight changes in activation energy of degradation for both the components and through the suppression of degradation by an antioxidant.