A novel zinc-containing additive for the long-term thermal stabilization of poly(vinyl chloride)

作者：Chen, Guoan; Gu, Liqiang; Yao, Youwei^*

来源：Polymer Degradation and Stability, 2014, 107: 113-119.

DOI：10.1016/j.polymdegradstab.2014.05.009

• Polyvinyl chloride
• Zinc
• Calcium
• Thermal stabilizer

A Zn-containing complex ([ZnL2]center dot xH(2)O, x approximate to 4, abbreviated as ZnL2; HL = 1,3-dihydroxy-2-hydroxymethy1-2-(salicylidimino)propane) was synthesized and used as a thermal stabilizer. Through discoloration and dehydrochlorination tests at 180 degrees C, ZnL2 was proved to be a co-stabilizer of long-term thermal stability for poly(vinyl chloride) (PVC): compared with the PVC samples stabilized using typical metallic soap stabilizers with the mass ratio of calcium stearate (CaSt(2)) to zinc stearate (ZnSt(2)) ranging from 1.5/0 to 0/1.5, whose induction time (t(i)), stability time (t(s)) respectively ranged from 9 to 54 min, from 12 to 56 min, the PVC samples stabilized using combinations with the mass ratio of CaSt(2) to ZnL2 from 1.5/0 to 0/1.5 showed apparent thermal stability with th ts ranging from 44 to 85 min, from 49 to 88 min. PVC sample (PVC resin = 50.0 g, ZnL2 = 1.5 g, pentaerythritol = 0.3 g, dioctyl phthalate = 2.5 g) displayed a significant long-term thermal stability with Li of 102 min, t(s) of 105 min, and totally-turning-black time of 170 min.

• 出版日期2014-9
• 单位清华大学深圳研究生院