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Rubber‐filler interactions: Solution adsorption studies
Author(s) -
Gilliland E. R.,
Gutoff Edgar B.
Publication year - 1960
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1960.070030704
Subject(s) - adsorption , degree of unsaturation , polymer , natural rubber , molar mass distribution , filler (materials) , materials science , polymer chemistry , chemical engineering , polymer adsorption , composite material , chemistry , organic chemistry , engineering
To help explain the mechanism of rubber reinforcement, studies of equilibrium adsorption from benzene solution of several polyisobutylenes and of a butyl rubber onto a high abrasive furnace black and other fillers were made. The adsorption is essentially physical in nature. On a weight basis, it decreases with increasing temperature in the range 25–75°C., is unaffected by unsaturation of the polymer, and increases with concentration in the range 0.25–1% for the lower molecular weight polymers and with increasing molecular weight (but above about 500,000 the effect is small). Adsorption of the higher molecular weight polymers is unaffected by concentration. Adsorption by the more polar, oxygenated channel blacks or by the highly polar, inorganic Hi‐Sil is negligible. The higher molecular weight species are preferentially adsorbed to such an extent that apparently reliable molecular weight distribution curves can be obtained from these simple equilibrium experiments. Milling studies show that a high molecular weight polymer can be softened by a filler.