Solubility and degradability of a partially hydrolyzed poly(bis(ethylamino)phosphazene) in cold water and its complex formation with poly(acrylic acid)

Abstract

A polymer was prepared from poly(dichlorophospazene)[(−N=PCl₂−)_n] by substituting 86mol% of its chlorine groups with ethylamino groups and hydrolyzing the residual chlorine groups. This polymer, named PBEAP86, had film-forming ability and the film showed solubility in water at temperatures below 3°C. The polymer thus dissolved was gradually degraded in water. These properties of PBEAP86 were compared with those of one of the polymers prepared in the previous paper, which had a higher content of ethylamino group of 93mol%. The formation of complex structure of PBEAP86 with poly(acrylic acid) was also investigated by the help of measurements of infrared spectroscopy, differential scanning calorimetry, X-ray diffraction and tensile testing.