Partager

Document IIF

Effets de l'alcool polyvinylique sur les phénomènes de surrefroidissement de l'eau.

Effects of poly-vinyl alcohol on supercooling phenomena of water.

Auteurs : KUMANO H., HIRATA T., KUDOH T.

Type d'article : Article, Article de la RIF

Résumé

The effects of a polymer additive on the supercooling of water were investigated experimentally. Poly-vinyl alcohols (PVAs) were used as the additives, and samples were prepared by dissolving the PVA in water. Since the characteristics of PVA are decided by its degrees of polymerization and saponification, these were varied along with the concentration as the experimental parameters. Moreover, the effect of purity of the water was also considered. Each sample was cooled and the temperature at the instant when ice appeared was measured. Since the freezing of supercooled water is a statistical phenomenon, many experiments were carried out and the average degree of supercooling was obtained. It was found that PVA affects the nucleation of ice in supercooled water and the degree of supercooling increases with the addition of PVA even for water with low purity. The average degree of supercooling increases with an increase in the degree of saponification of PVA.

Documents disponibles

Format PDF

Pages : 454-461

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Effects of poly-vinyl alcohol on supercooling phenomena of water.
  • Identifiant de la fiche : 2009-0514
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 3
  • Date d'édition : 05/2009

Liens


Voir d'autres articles du même numéro (18)
Voir la source

Indexation