SYNTHESIS，PROPERTY　AND　HEAT　STABILITY　FO　RPOLYVINYLCHLORIDSOFANTIMONYTRIS（MERCAPTOACIDESTER）

来源期刊：中南大学学报(英文版)1994年第1期

论文作者：Huang Kelong Liu Younian Gu Yingying Shu Wanyin

文章页码：45 - 50

Key words：antimony tris (mercaptoacid ester); synthesis; heat stabilizer; polyvinyl chloride

Abstract: Antimony mercaplde heat stabilizer for polyvinyl chlorideis synthesized from antimony trioxide and mercaptocarboxylic acid esters, HS(CH₂).COOI-C₈H₁₇ (n=1～2) at 100～115 C In the presence of 0. 5%～1 % an organic acid catalyst. Some physicochemicalconstants of the compounds, such as density and refractive index, aredetermined. The complexes are hydrolabll in aqueous solutions andthe bond of Sb-S is weaker than that of Sb-o. The forming bondproperty of antimony tris (mercaptoacid ester ) has been elucidatedby measurement of infrared spectra in comparison with mercaptocarboxylic acid esters. The polyvinyl chloride resins containing antimony mercaptide heat stabilizers, do not darken at elevated temperatures and exhibit a high degree of stability. It is proposed that mercaptocarboxylic acid ester freeradicals can esterify PVC microradicals at carbon atoms with upaired electrons.