DEVELOPMENT OF SYNERGISTIC HEAT STABILIZERS FOR PVC FROM ZINC BORATE-ZINC PHOSPHATE

The importance of flame-retardant and smoke-suppressed poly(vinyl chloride) (PVC) compositions is increasing gradually in the polymer industry since PVC releases smoke and toxic gases (hydrogen chloride, HCl) during heating at temperatures above 140°C with the result of dehydrochlorination reaction....

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Bibliographic Details
Published in:Chemical engineering communications 2009-01, Vol.196 (1-2), p.148-160
Main Authors: Erdoğdu, Cem Aykut, Atakul, Sevdiye, Balköse, Devrim, Ülkü, Semra
Format: Article
Language:English
Subjects:
Comparative analysis
Heat stabilizer
Heating
Polymers
Polyvinyl chloride
PVC
Studies
Temperature
Thermal degradation
Zinc
Zinc borate
Zinc phosphate
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Summary:The importance of flame-retardant and smoke-suppressed poly(vinyl chloride) (PVC) compositions is increasing gradually in the polymer industry since PVC releases smoke and toxic gases (hydrogen chloride, HCl) during heating at temperatures above 140°C with the result of dehydrochlorination reaction. In this study, the synergistic effects of zinc borate (ZB)-zinc phosphate (ZP) on the thermal stability of PVC were investigated using thermal techniques. The induction and stability time values of PVC plastigels were obtained at 140° and 160°C. The results revealed that PVC plastigels having only ZP and ZB retarded dehydrochlorination of PVC compared with the unstabilized sample. However, the plastigels with both ZB and ZP had a superior synergistic effect on char formation of PVC. Since the induction periods of the samples having both ZB and ZP were higher than those of the unstabilized samples having only ZB or only ZP, the synergistic effect was observed.
ISSN:0098-6445
1563-5201
DOI:10.1080/00986440802293148