1-Cyanoethanoyl-4-acryloyl thiosemicarbazide and its metal complexes as thermal stabilizers for rigid poly(vinyl chloride)

摘要

1-Cyanoethanoyl-4-acryloyl thiosemicarbazide (CEATS) and its metal complexes with Sn~(2+), Cd~(2+), Co~(2+) ions have been inves- tigated as thermal stabilizers for rigid poly(vinyl chloride). The results reveal that the stabilizing efficiency of CEATS is comparable to that of the commonly used industrial stabilizers, while the stabilizing efficiencies of CEATS complexes greatly exceed that of the parent molecule. CEATS as a co-stabilizer with reference stabilizers namely Cd--Ba stearates, dibutyl tin maleate, or basic lead sulfate led to a synergistic effect. A probable mechanism expressing the interaction of CEATS molecule with metal salts stabilizers has been proposed.