Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2019 / V.31,no.3,Sept Title Effect of Synthetic Hydrotalcite on Salt Water Resistance of Chloroprene rubber Foam Authors Eun Young Park*, Eun Ho Seo and Sung Wook Lim Institution/Affiliations Korea Institute of Footwear and Leather Technology Pages/Total page pp.177 ~ 186 / 10 Language Korean Abstract Abstract In this study, we investigated for synthetic hydrotalcite in chloroprene rubber foam. Experiments were carried out to find the optimum content ratio by controlling the contents of MgO and Hydrotalcite. Swelling test in toluene immersion was made to measure the crosslinking density of CR foams, and the cure properties were investigated with flat die rheometer and Mooney viscosity. The difference of hardness, tensile strength and elongation at break were observed after immersing in 7% NaCl or 21% NaCl solutions for a day and four days. In addition, the volume change and water content remaining in CR foam were measured after immersing NaCl solution. As content of MgO increased, the value of the cure torque tended to increase, but it was almost constant above 2phr of MgO. However, the Mooney viscosity decreased with increasing MgO content. The crosslinking density, determined by the swelling ratio, showed that the CR compound without MgO showed a higher degree of swelling. When the content of hydrotalcite/MgO was 3:2, it was the lowest volume change of CR form. Also, As the content of hydrotalcite decreased, the difference of mechanical properties before and after immersion NaCl solution increased. Keywords Keywords synthetic hydrotalcite, chloroprene rubber foam, salt water resistance, crosslinking density, flat die rheometer Download   Reference