Journal
POLYMER DEGRADATION AND STABILITY
Volume 99, Issue -, Pages 211-218Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2013.11.003
Keywords
Poly(vinyl chloride); Thermal stabilizer; Basic zinc cyanurate; Dibenzoylmethane; Epoxidized soybean oil; Synergistic effect
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Funding
- National Natural Science Foundation of China [21004052, 51173167]
- Zhejiang Provincial Innovative Research Team [2011R09004-10, 2012C11023-5]
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Basic zinc cyanurate (Zn-3(C3N3O3)(2)center dot ZnO, represented as Zn3Cy2) was synthesized via a precipitation method, and investigated as a thermal stabilizer for poly(vinyl chloride) (PVC) by thermogravimetric analysis (TGA), Congo red test and discoloration test. The thermal stability of PVC was significantly enhanced with the addition of Zn3Cy2. Compared with zinc stearate (ZnSt(2)), it is observed a significant improvement that Zn3Cy2 could delay the zinc burning of PVC. This is attributed to the strong ability of the cyanurate anions in Zn3Cy2 to absorb the hydrogen chloride released by the degradation of PVC. Moreover, mixing Zn3Cy2 with calcium stearate (CaSt(2)) in different mass ratios greatly promoted the thermal stability of PVC. Excellent synergistic effects could be observed when CaSt(2)/Zn3Cy2 combined with some commercial auxiliary stabilizers. Addition of dibenzoylmethane (DBM) brought a remarkable increase in initial color for PVC containing CaSt(2)/Zn3Cy2 while epoxidized soybean oil (ESBO) could improve both initial color and long-term stability. (C) 2013 Elsevier Ltd. All rights reserved.
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