Characterization of poly(D,L-lactic acid) by gel permeation chromatography


Dijk, J.A.P.P. van and Smit, J.A.M. and Kohn, F.E. and Feijen, J. (1983) Characterization of poly(D,L-lactic acid) by gel permeation chromatography. Journal of Polymer Science: Polymer Chemistry Edition, 21 (1). pp. 197-208. ISSN 0360-6376

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Abstract:A number of samples of poly(D,L-lactic acid) (PLA) with weight-average molecular weights Ṁw in the range 15,000-350,000 were prepared by a ring-opening polymerization. The molecular weight distributions (MWDs) of these samples were determined by gel permeation chromatography (GPC). The method involves a universal calibration of the columns on the basis of polystyrene standards and a rapid iteration algorithm leading to the establishment of the Mark-Houwink relationship. In addition, osmometry and viscometry data are presented. The effect of hydrolytic degradation on the MWD of two PLA samples was studied by GPC.
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Copyright:© 1983 Wiley InterScience
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