“…On one hand, the toxicity of trichlorophenol limited the use of TCP-based polymers, while on the other hand, the hydrolytic susceptibility of NHB-based polyesters raised the question of their long lasting stability. Rejmanova and Kopecek copolymerized a new class of methacrylate monomer, p -nitro phenyl methacrylate (PNPMA) (Table ), with N -(2-hydroxypropyl)-methacrylamide (HPMA) under free radical polymerization. − However, incorporation of PNPMA within the copolymer resulted in a low polymerization yield as also observed by Okawara et al for poly(styrene- co -PNPA) . For a series of copolymers of p -nitrophenyl acrylate (PNPA) with styrene, methyl acrylate, and N,N -dimethylacrylamide (DMA), the rate of aminolysis was studied in dioxane and chlorobenzene .…”