Miscibility of methacrylic polymers with different pendant groups

Miscibility is not always common in blends of homologous polymers that diff er in structure but possess the same functional groups. In this study, two methacrylate polymers, which differ by a methylene unit, were found to be m iscible in accordance with morphology and thermal transition criteria of po lymer miscibility. Miscibility of the pair poly(phenyl methaclylate) and po ly(benzyl methacrylate) is quite unusual. Interactions between carbonyl uni ts and phenyl rings of these two polymers are discussed. FT-IR results indi cate an intimate mixing state between these two polymers leading to mutual influence in the absorbance wavenumbers for C=O, ether groups and, possibly , phenyl rings.