Reinforcing Capron Fibre with the Aid of Modified Bentonite

摘要

Investigated was the effect of high dispersion bentonite on the strength of capron fiber. The bentonite was modified by cation exchange with hydrochloride octadecylamine or by the effect of dimethyldichlorosilane. The molecular weight of polycaprolactam changes slightly in the presence of filler. Introduction of small amounts of modified bentonite (about 1%) leads to an increase in strength at 20C by 10-12%. At greater filler concentrations strength decreases, and at 3% filler it becomes lower than in the unfilled polymer. Introduction of non-modified bentonite causes a reduction in strength of the fiber. A rise in test temperature leads to total reduction in strength and reduction in maximum attainable relative reinforcement. Maximum reinforcement at 50C constitutes 7% of the strength of the unfilled fiber at very same temperature, and at 90C strenthening is not observed. (Author)