Poly(glycerol-dodecanoate) (PGD) has garnered increasing
attention
in biomedical engineering for its degradability, shape memory, and
rubber-like mechanical properties. Adjustable degradation is important
for biodegradable implants and is affected by various aspects, including
material properties, mechanical environments, temperature, pH, and
enzyme catalysis. The crosslinking and chain length characteristics
of poly(lactic acid) and poly(caprolactone) have been widely used
to adjust the in vivo degradation rate. The PGD degradation rate is
affected by its crosslink density in in vitro hydrolysis; however,
there is no difference in vivo. We believe that this phenomenon is
caused by the differences in enzymatic conditions in vitro and in
vivo. In this study, it is found that the degradation products of
PGD with different molar ratios of hydroxyl and carboxyl (MRH/C) exhibit varied pH values, affecting the enzyme activity and thus
achieving different degradation rates. The in vivo degradation of
PGD is characterized by surface erosion, and its mass decreases linearly
with degradation duration. The degradation duration of PGD is linearly
extrapolated from 9–18 weeks when MRH/C is in the
range of 2.00–0.75, providing a protocol for adjusting the
degradation durations of subsequent implants made by PGD.