Polycarbonate was blended with zinc, zinc borate (2ZnO·3B2O 3·3.5H2O) and zinc oxide. Blends made of zinc/polycarbonate and especially zinc borate/polycarbonate show major improvement in oxygen index values. Ohio State University (OSU) heat release studies show reduction in heat release only for zinc borate/polycarbonate blends compared to virgin polycarbonate. No improvement in smoke suppression was observed from NBS Smoke Chamber studies for these blends. From DSC studies there was a low ering of Tg's. Thermogravimetric analyses show the blends have lower tempera ture stability in nitrogen (50% weight loss) compared to a control.
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References
1.
Benrashid, R. , G.L. Nelson and D.J. Ferm.1993. " Effect of Zinc Borate on Fire Properties of m-PPO," J. of Fire Sciences, 11:210-231.
2.
Benrashid, R., G.L. Nelson and D.J. Ferm.1994. Effect of Triaryl Phosphate, Zinc and Zinc Borate on Fire Properties of High Impact Polystyrene and Modified Polyphenylene Oxide. In press.
