Synthesis And Biodegradation Of Three
Poly(alkylene Succinate)s: Mathematical
Modelling Of The Esterification Reaction And
The Enzymatic Hydrolysis
Author(s)
D. S. Achilias & D. N. Bikiaris
Abstract
Synthesis of three biodegradable aliphatic polyesters, namely poly(ethylene
succinate), poly(propylene succinate) and poly(butylene succinate), is presented
using the appropriate diols and succinic acid. A theoretical mathematical model
for the esterification reaction is developed and applied successfully in the
simulation of all experimental data. Different glycols do not influence the
average degree of polymerization of the oligomers produced much, even though
they slightly affect esterification rates in the order BG>PG>EG. In contrast,
these values are affected by the amount of catalyst, with a larger catalyst molar
ratio giving a polymer with a larger than average molecular weight.
Biodegradability studies of the polyesters included enzymatic hydrolysis for
several days using Rhizopus delemar lipase at pH 7.2 and 30 o C. The
biodegradation rates of the polymers decreased following the order
PPSu>PESu ≥PBSu and it was attributed to the lower crystallinity of PPSu
compared to other polyesters, rather than to differences in chemical structure.
Finally, a simple theoretical kinetic model was developed and Michaelis-Menten
parameters were estimated.
Keywords: biodegradable polymers, enzymatic hydrolysis, aliphatic polyesters,
mathematical modelling.
1 Introduction
Continuous environmental surcharge due to domestic and industrial waste
consists of one of the major problems of growth nowadays. Plastic waste
Keywords
biodegradable polymers, enzymatic hydrolysis, aliphatic polyesters,
mathematical modelling.
Related Book
Other papers in this volume
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