Sorption and Swelling of Poly(D,L-lactic acid) and Poly(lactic-co-glycolic acid) in Supercritical CO2
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Date
2007-12
Publication Type
Conference Paper
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yes
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Abstract
The equilibrium sorption and swelling behavior in supercritical CO2 of poly(D,L-lactic acid) and poly(lactic-co-glycolic acid) has been studied at a temperature of 35 °C and at pressures up to 200 bar. Sorption was measured through a gravimetric technique and swelling by visualization. From these data, the behavior of the different polymers can be compared. In terms of partial molar volume of CO2 in the polymer matrix, all the polymers exhibit a behavior typical of rubbery systems. The experimental results have been modeled using the Sanchez-Lacombe equation of state, which is able to represent the actual behavior of the polymer-CO2 systems with reasonable accuracy.
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published
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Journal / series
Volume
259 (1)
Pages / Article No.
197 - 202
Publisher
Wiley-VCH
Event
9th International Workshop on Polymer Reaction Engineering
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Subject
biodegradable; PLA; PLGA; sorption and swelling; tissue engineering
Organisational unit
03451 - Morbidelli, Massimo (emeritus) / Morbidelli, Massimo (emeritus)
03484 - Mazzotti, Marco (emeritus) / Mazzotti, Marco (emeritus)