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M. Zaborski , J. Ruciński, D. Bieliński


Surface energy of vulcanizates differing in structure and density of space network


Polimery 1991, No 3, 109


DOI: dx.doi.org/10.14314/polimery.1991.109

Summary

By wetting angle measurements the values of surface energy an its dispersive and polar components have been determined for vulcanizates differing in chemical structure and network density. On the example of cis-l,4-polylsoprene and butadiene-acrylonitrile rubber it has been demonstrated that the concentration of cross C-C-bonds has no effect on the surface energy of vulcanizates. But in the case of cis-l,4-polyisoprene vulcanizate with polysulfide bridges, an increase in the crosslinking density and in the sulfidization degree of network causes an increase of both the surface energy of vulcanizates and of its polar component. A similar behaviour has been observed for butadiene-styrene rubber, whereas in polar butadiene-acrylonitrile rubber the polysulfide bridges do not cause an increase in surface energy.


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