The effect of structural organization on the mechanical strength of poly(vinyl alcohol) gels |
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| Authors: | Vladimí r Hná t,Eva prokopová ,Miroslav Raab |
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| Abstract: | Ultimate mechanical properties of poly(vinyl alcohol) adhesive layers prepared from fresh aqueous solution, aged solution and water-swollen PVA particles are compared. Tensile strength and toughness of dry adhesive layers significantly increase in the cited order. These differences may be attributed to the formation of heterogeneous thermoreversible network upon ageing and to the presence of heterogeneities in PVA gel which act as barriers against crack propagation. |
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