HU You-Mo. STUDIES ON VULCANIZED LATEX——PHYSICO-MECHANICAL PROPERTIES OF IONIC DEPOSITED WET-GEL AND DRY-FILM OF VULCANIZED NATURAL RUBBER LATEX[J]. Acta Polymerica Sinica, 1965,7(3):171-177.
HU You-Mo. STUDIES ON VULCANIZED LATEX——PHYSICO-MECHANICAL PROPERTIES OF IONIC DEPOSITED WET-GEL AND DRY-FILM OF VULCANIZED NATURAL RUBBER LATEX[J]. Acta Polymerica Sinica, 1965,7(3):171-177.DOI:
The effects of the degree of vulcanization on the ionic deposition rate and the physico-mechanical properties of wet-gel and dry-film from vulcanized natural rubber 1atex were studied.Experimental results indicate that different degrees of vulcanization gave no signifi-cant changes in the ionic deposition rate.This is due to the fact that the ionic deposi-tion rate depends upon the colloidal properties only and is not affected by the intra-globule structure.The kinetics of ionic deposition from vulcanized natural rubber latex is similar to that from the unvulcanized latex.It can be expressed by the following equation: q一0.01070t1-3 where q is the amount of deposit,t is the deposition time.The physico-mechanical properties of wet-gel improved at first,and declined again with further vulcanization.This phenomenon is explained by the diffusion of the chain segments and the redistribution of cross-links of the cross-linked molecules between rubber particles.The properties of dry-film are similar to those of wet-gel.