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M. Zaborski, L. Ślusarski

The effect of network structure of elastomers on their interactions with plastomers



Polimery 1996, No 1, 43


DOI: dx.doi.org/10.14314/polimery.1996.043


Summary

The surface energy of czs-l,4-polyisoprene containing C-C crosslinks or mono-, di-, and polysulphide crosslinks was investigated. Its adhesion to polycaproamide, polyacrylonitrile and polyethylene terephtalate) was determined. The tensile mechanical properties of blends of c/s-l,4-polybutadiene with low density polyethylene and polyacrylonitrile were also investigated. An effect of the type of crosslinking system on the surface energy of vulcanizates was observed. The higher the sulphur content of the crosslinks the higher is also the polar component of the surface energy: besides, depending on the type of vulcanization accelerator used, vulcanizates were obtained with proton acceptor (diphenylguanidine) or proton donor (mercaptobenzothiazol) character of the surface. Adhesion of elastomers to plastomers depends on the crosslinking system used. It was shown that the activity of polyacrylonitrile as a filler in vulcanizates containing sulphur and diphenylguanidine is considerably higher than in the peroxide-cured vulcanizates, whereas polyethylene has a higher reinforcing activity in systems crosslinked with dicumyl peroxide than in those crosslinked with sulphur and with an accelerator.


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