| Abstract: | ABSTRACT Novel 4-vinylphenyldimethylsilanol polymer (PVPDMS) and co-polymers (ST-VPDMS) were synthesized by the oxyfunctionalization re- action of the silane. The reaction was found to proceed efficiently and quantitatively. Miscibility studies indicated that about 4 molpercnt; of 4-vin- ylphenyldimethylsilanol (VPDMS) functional group in the copolymer could achieve miscibility with poly(n-butyl methacrylate) (PBMA) and poly(N-vinylpyrrolidone) (PVPr). However, for copolymers containingmore than 34 molpercnt; VPDMS, their blends with PBMA were immiscible. The observed miscibility window of ST-VPDMS/PBMA blends was as- cribed to the competition between the self-association of dimethylsilanol groups and intermolecular hydrogen bonding of dimethylsilanol groups with the carbonyl groups of PBMA. A comparison of the efficiency of the miscibility enhancement and the miscibility windows of VPDMS, p-(hexafluoro-2-isopropyl) styrene (HFPS), and phenolic-containing polymers was made in terms of such competition. The glass transition behavior of the miscible blends involving VPDMS and HFPS-containing styrene copolymers with PBMA were analyzed by the Schneider equation. |
