Biomedical Engineering Reference
In-Depth Information
Chapter 14
V
ARIATIONS IN
P
HYSICAL
-C
HEMICAL
P
ROPERTIES
OF
B
LOCK
-C
OPOLYMER
C
HITOSAN WITH
M
ETHYL
A
CRYLATE DURING
B
IODEGRADATION UNDER THE
A
CTION OF
A
SPERGILLUS
T
ERREUS
V. F. Uryash,
*
I. N. Kalashnikov, L. A. Smirnova, N. Yu. Kokurina,
A. E. Mochalov, V. F. Smirnov, O. N. Smirnova and V. N. Larina
Research Institute of Chemistry,
Nizhni Novgorod State University, Nizhni Novgorod, Russia
A
BSTRACT
Variations in physical-chemical properties of the block-copolymer of crab chitosan
with methyl acrylate under the action of micromycetes (
Aspergillus terreus
) are
investigated. The obtained data have been compared with the characteristics of chitosan
and polymethyl acrylate as well as the mixture extracted from the solution of
corresponding homopolymers. The standard enthalpy of combustion and chitosan
formation have been determined.
Keywords:
Block-copolymer, crab chitosan, methyl acrylate, biodegradation, Aspergillus
terreus
1. I
NTRODUCTION
Biostability and biodegradation of different polymer materials is a very important
ecological and engineering problem [1]. There are several aspects of this problem. One of
them is elimination of domestic and industrial wastes [2]. It is known that an important role is
the processes of material destruction belongs to microorganisms, namely microscopic fungi.
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