Diffusion of a volatile liquid in polychloroprene rubber

Abstract

SynopsisThe penetration rate of chloroform (highly volatile solvent) in chloroprene rubber vulcanizate, based on different carbon black type and loading, has been studied. The results relevent to carbon black loading have shown an increase in the penetration rate with the increase in loading percentage. Other factors affecting the penetration rate, such as particle size and aggregate structures of carbon black, have shown some confusing results, such as the decrease in penetration rate with the increase of particle size and the decrease in penetration rate at a higher degree of equilibrium volume swelling. These results were attributed to the wrinkles formed at the surface of the rubber at these high equilibrium swellings.

A rheometrical technique to study the swelling kinetics of vulcanized rubber particles by paraffinic solvents using a torque rheometer

“…[17][18][19][20] Our results suggest considering the solvent uptake as a three-step sequence that confirms this view. First, rubber particles swell while some fluid remains that lubricates the flow into the mixer cavity.…”

Penetration of oils into polychloroprene rubber

“…The swelling of rubber involves a diffusion process by which liquid is transported from one part of the sample to another. The diffusion theory in elastorners1i2 is based on the assumption that the swelling commences by the absorption of liquid in the surface layer of the sample to a certain concentration equal to that of the whole sample at final equilibrium; then the swelling proceeds by increasing the depth of the swollen layers at a penetration rate P, [3][4][5] for a rubber sheet of thickness d. Me and Mt are the weight uptake of liquid at equilibrium and after time t, respectively.…”

Influence of Ion Beam and Carbon Black Filler Type on the Mechanical and Physico-Chemical Properties of Butadiene Acrylonitrile Rubber (NBR)

“…Since it is virtually impossible to provide exact values for the absolute thickness τ and the Young's modulus Ei of the interphase, the parameter B was determined from the experimental data using the following expression [17], derived from equation (3) Diffusion theory in elastomers [23] is based on the assumption that the swelling starts by the sorption of the liquid at the surface of the sample to a certain concentration equal to that attained by the whole sample at equilibrium; then the swelling proceeds by increasing the depth of the swollen layers. The relation between the average diffusion coefficient, Dav, and the penetration rate, P, is given by [24,25] :…”