Grafting onto preformed polyester network using thermolabile azo groups

Abstract

AbstractPolycondensation of 4,4‐azo‐bis(cyanopentanoyl chloride) and o‐phthalyl chloride between polyethylene glycol with addition of glycerine leads to polyester networks containing thermolabile azo groups. The networks have been characterized in terms of their swelling in benzene, chlorobenzene, and methacrylonitrile. Grafting of methacrylonitrile onto these preformed networks was then achieved by thermal decomposition of NN groups in the presence of methacrylonitrile.