Viscosity-modified lactide polymer composition and process for manufacture thereof
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United States of America Patent
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Jan 14, 1997
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N/A
app pub date -
Jul 27, 1994
filing date -
Jul 30, 1993
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Abstract
A composition comprising a polylactide polymer with improved extensional viscosity and methods of making the same are disclosed. The polylactide polymer composition is prepared by providing in the composition polylactide polymer molecules which have been modified, relative to linear non-substituted polylactide, to provide increased molecular interaction among polylactide backbone chains in the composition. The preferred polylactide polymer composition has a number average molecular weight of at least about 10,000 (preferably at least 50,000) and a polydispersity of at least about 2.5. In addition, the polylactide polymer composition should have a neck-in ratio of less than about 0.8.
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