分别含有质子给体和质子受体的丙烯酸酯共聚物在溶液中的特殊相互作用研究

SPECIFIC INTERACTION BETWEEN ACRYLATE COPOLYMERS BEARING PROTON DONOR AND PROTON ACCEPTOR IN SOLUTIONS

用粘度法和光散射法研究了分别具有质子给体 (Protondonor)和质子受体 (Protonacceptor)官能团的丙烯酸酯共聚物在溶液中的相互作用 .从粘度增长因子和聚合物在溶液中理想增比粘度的关系基础上提出了一个新的相互作用参数ka,研究了质子给体聚合物和质子受体聚合物在甲苯中的特殊相互作用 ,讨论了丙烯酸酯含量和酯烷基长度对组分间相互作用的影响 .结果表明 ,组分间的特殊相互作用随着丙烯酸长碳链酯含量和酯烷基长度的增加而增强 .光散射的结果表明ka

The interpolymer specific interactions between acrylate copolymers with proton donor and proton acceptor in solutions were investigated by means of viscometry and light scattering. Poly (styrene/acrylate/acrylic acid) as proton donating polymer(PDP) and poly (styrene/acrylate/4-vinylpyridine) as proton accepting polymer( PAP) with various macromolecular chain compositions were prepared by emulsion copolymerization and the complexed solutions formed by PDP and PAP were prepared. A novel interpolymer interaction parameter k(a) based on the relationship of viscosity enhancement factor with theoretical specific viscosity of the blend, eta(sp,m,cal), has been developed to study the interpolymer specific interactions in toluene. The effects of the content and alkyl length of acrylate on interpolymer interaction were discussed. The results show that with the change in mole fraction of AA (F-AA) in blends, there existed a maximal k(a) indicating the strongest interaction between PDP and PAP. The mole fraction of AA corresponding to maximal k(a), F-AA,F-max, increases gradually up to 0.5 as OA content decreases in PDP and relatively insensitive to composition of PAP. The interpolymer interaction between PDP and PAP is increased with increasing OA content in component copolymers due to Van der Waals force between side chains of OA unit on unlike macromolecular chains. The enhancement of the interpolymer specific interaction can also be realized by increasing the alkyl length of acrylate. Light scattering experiments confirm that k(a) can act qualitatively as measure of the magnitude of the interpolymer interaction ability.