Abstract: Poly(vinyl chloride)(PVC)/hydrotalcite nanocomposites were prepared via suspension poly merization of vinyl chloride in presence of 10-undecenonate intercalated hydrotalcite. The structure of obtained nanocomposite and influences of hydrotalcite on the thermal stability and the smoke density during combustion were investigated. It showed that a part of vinyl chloride was intercalated into the layers of hydrotalcite and copolymerized with 10-undecenonate in situ. Hydrotalcite particles were par- tiallyexfoliated and dispersed in polymer matrixin the nano-scale. The thermal decomposition tempera- ture and time increased as the weight fraction of hydrotalcite increased, indicating the improvement of thermal stability of PVC. Nanosized hydrotalcite particles exhibited an effective smoke-suppression function on PVC. The maximum smoke density decreased 40% when the weight fraction of hydrotal- cite was 1.25 % in the nanocomposite.

Key words: polyvinyl chloride);hydrotalcite, in-situ polymerization;thermal stability, smoke density