Poly(glycerol sebacate)
(PGS), produced from renewable monomers
such as sebacic acid and glycerol, has been explored extensively for
various biomedical applications. However, relatively less attention
has been paid to explore PGS as sustainable materials in applications
such as elastomers and rigid plastics, primarily because of serious
deficiencies in physical properties of PGS. Here, we present two new
approaches for enhancing the properties of PGS; (i) synthesizing block
copolymers of PGS with poly(tetramethylene oxide)glycol (PTMO) and
(ii) preparing a blend of PGS-b-PTMO with a poly(ester–ether)
thermoplastic elastomer. The consequence of molar ratio (hard and
soft segments) and Mn of soft segment
on tensile properties of the material was investigated. The PGS-b-PTMO with 25:75 mole ratios of hard and soft segments
and having a medium Mn soft segment (5350
g mol–1) exhibits an appreciable increase in percentage
of elongation that is from 32% for PGS to 737%. Blends of PGS-b-PTMO and a thermoplastic polyester elastomer, Hytrel 3078,
form a semi-interpenetrated polymer network, which exhibits increased
tensile strength to 2.11 MPa and percentage of elongation to 2574.
An elongation of such magnitude is unprecedented in the literature
for predominantly aliphatic polyesters and demonstrates that the simple
polyester can be tailored for superior performance.