I. Rehman et al., IN-VITRO DEGRADATION OF POLY(ESTER-URETHANES) FOR BIOMEDICAL APPLICATIONS, Journal of materials science. Materials in medicine, 7(1), 1996, pp. 17-20
Degradation studies on a series of polyesterurethanes having different
compositions of hard and soft blocks have been performed utilizing an
accelerated test method. Degradation was followed by titrimetry, mass
loss, mechanical properties and infrared spectroscopy. As the number
of methylene groups present within the polyester moiety was increased,
the resistance to degradation also increased. The presence of an arom
atic component in the hard block reduced the rate of hydrolysis but th
e degradation in mechanical properties was accelerated.