Physical properties of gamma irradiated poly(vinyl alcohol) hydrogel preparations

Poly(vinyl alcohol) films from 15% w/w aqueous solutions and a thickness of 0.2 mm were selected for this study. The films were first humidified and then acetalized and/or gamma irradiated. Then, their physical properties were tested. Tensile strength of the hydrogel films reached its maximum value...

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Bibliographic Details
Published inRadiation physics and chemistry (1993) Vol. 55; no. 5-6; pp. 723 - 726
Main Authors Mondino, A.V, González, M.E, Romero, G.R, Smolko, E.E
Format Journal Article Conference Proceeding
LanguageEnglish
Published Oxford Elsevier Ltd 01.08.1999
Elsevier
Subjects
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
Heat resistance
Mechanical properties
Vinyl alcohol copolymer
Experimental study
Property processing relationship
Radiochemical crosslinking
Colloidal gel
Polyvinylalcohol
Vinyl formal copolymer
Radiation dose
Chemical modification
Gamma radiation
Acetalization
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Summary:Poly(vinyl alcohol) films from 15% w/w aqueous solutions and a thickness of 0.2 mm were selected for this study. The films were first humidified and then acetalized and/or gamma irradiated. Then, their physical properties were tested. Tensile strength of the hydrogel films reached its maximum value in samples irradiated with a 80 kGy dose, in the case of acetalized films the dose necessary for maximum tensile strength was only 40 kGy. The combination of acetalization with formaldehyde and gamma radiation produced an elastic hydrogel with good tackiness and excellent mechanical and thermal strength.
ISSN:0969-806X
1879-0895
DOI:10.1016/S0969-806X(99)00219-4