Solubility and diffusion coefficients of gaseous formaldehyde in polymers.
The solubility and diffusion (desorption) coefficients of gaseous formaldehyde in 14 materials have been measured at different temperatures. Cellulose, paper, polyamide (Nylon 6), polyester and natural rubber (latex) show very high values of formaldehyde solubility and very low diffusion coefficients, with a weak or inversed influence of the temperature, leading to the conclusion that a chemical reaction occurs with the formaldehyde. The behaviour of the other polymers follows the classical laws of solubility and diffusion of gases except for silicone rubber which shows two-phase desorption curves.
Hennebert
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Laboratoire de Pharmacie Galénique, Université Catholique de Louvain, Brussels, Belgium.
D001672:Biocompatible Materials; D004058:Diffusion; D005557:Formaldehyde; D006358:Hot Temperature; D007700:Kinetics; D011108:Polymers; D012995:Solubility; D013242:Sterilization
D001672:Biocompatible Materials; D011108:Polymers; D005557:Formaldehyde