Controlled degradation of polylactic acid graftingN-vinyl pyrrolidone induced by gamma ray radiation

Polylactic acid (PLA) films were surface modified by gamma ray irradiation‐induced grafting of N ‐vinyl pyrrolidone (NVP). The in vitro degradation behavior of polylactic acid grafting N ‐vinyl pyrrolidone (PLA‐ g ‐PVP) copolymer was analyzed in terms of weight loss, molecular weight, and thermal properties. Grafting NVP significantly accelerated the degradation of PLA. The mass losses of the copolymers, which were less than that of pure PLA at...