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Citation: 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. shu

STUDIES ON VULCANIZED LATEX——PHYSICO-MECHANICAL PROPERTIES OF IONIC DEPOSITED WET-GEL AND DRY-FILM OF VULCANIZED NATURAL RUBBER LATEX

HU You-Mo

Received Date: 5 March 1964

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．
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