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Polímeros

versão impressa ISSN 0104-1428versão On-line ISSN 1678-5169

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.

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