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Poly(4-vinylpyridine N-oxide) was synthesized and its chemical structure characterized by ultra-violet and nuclear magnetic resonance spectroscopies. The polymer was soluble in water and trifluoroethanol. The viscosity and light scattering behaviours of the polymer are similar to those often observed for polyelectrolytes, although the polymer contains no ionizable groups. The strong NO dipole and...
Styrene copolymers containing about 4.3, 7.5 and 13.3 mol% of 4-vinylbenzenephosphonic acid (VBPA) as comonomer units were synthesized. The copolymers were insoluble in common organic solvents, possibly because side reactions involving the phosphonic acid groups had occurred during the drying process. Upon adding a small amount of concentrated hydrochloric acid to tetrahydrofuran, the polymer became...
Blends consisting of poly(styrene-co-4-vinylphenyldimethylsilanol)(ST-VPDMS) and poly(N-vinylpyrrolidone) (PVPr) were studied by glass transition temperature measurements and FTi.r. spectroscopy. It was found that 4 mol% of VPDMS monomer units had to be incorporated into styrene copolymers in order to form miscible blends with PVPr. Mutual precipitates in the form of interpolymer complexes were...
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