The highest number of ionic lattice nodes was decomposed in the collagen-containing vulcanizates. This would mean that the addition of protein to vulcanizates increases the number of ionic nodes in the elastomer matrix. The highest number of lattice nodes, about 10.7%, was decomposed under the influence of ammonia vapors in the vulcanizates of XNBR rubber, most probably due to the presence of COOH groups in XNBR, which make it possible to form additional polymer–collagen bonds.