Biopolymers as biomaterials: Mechanical properties of γ‐benzyl‐L‐glutamate‐L‐Leucine copolymers

Abstract

SummaryA series of ybenzyl-L-glutamate-L-leucine copolymers were prepared and cast films of the copolymers were subjected to dynamic mechanical and stress-strain tests. Dynamic mechanical testing revealed that the copolymers had a molecular relaxation at about 5OoC and that the magnitude of this relaxation was directly proportional to the molar concentration of glu(0Bz) in the copolymer. The magnitude of the 5OoC relaxation was also dependent upon orientation. The stress-strain behavior of the copolymers was examined before and after PECF treatment. Prior treatment with PECF caused in increase in the tensile strength to failure and a decrease in the elongation at failure. Increasing concentrations of leu caused the tensile strength to failure to increase. Efforts to degrade the films by refluxing 6 N HC1 and enzymic attack were unsuccessful and suggested that these copolymers could find use as biomedical materials.

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