Resumo

ARANHA, Isabele B.  e  LUCAS, Elizabete F.. Chemical Modification of Poly(Vinyl Alcohol): Evaluation of Hydrophilic/Lipophilic Balance. Polímeros [online]. 2001, vol.11, n.4, pp.174-181. ISSN 1678-5169.  https://doi.org/10.1590/S0104-14282001000400007.

Poly(vinyl alcohol) terpolymers have been obtained by reaction of partially hydrolized poly(vinyl alcohol) with different acid chlorides. The objective is the preparation of polymers with slight differences in their hydrophilic/lipophilic balance and in the interfacial activities of their solutions. The chemical modifications were characterized by means of ¹H NMR and the polymer properties were evaluated in terms of changes in solubility and surface tension. By chemical modification, polymers with low percentage of hydrophobic group were obtained. The water-soluble polymers obtained did not have the surface tension of their solutions altered. The solubility of the modified polymers decreased markedly, even with low contents of hydrophobic groups.

Palavras-chave : Poly(vinyl alcohol); fatty acids; esterification; solubility.

        · resumo em Português     · texto em Português     · Português ( pdf )