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Mechanical and thermal properties of polycarbonate composites reinforced with potassium titanate whiskers

✍ Scribed by S. C. Tjong; Y. Z. Meng

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
241 KB
Volume
72
Category
Article
ISSN
0021-8995

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✦ Synopsis

Polycarbonate (PC) composites reinforced with potassium titanate (K 2 Ti 6 O 13 ) whiskers were blended in a twin-screw extruder followed by injection molding. The surface of whiskers was treated with tetrabutyl orthotitanate prior to blending. The effects of potassium titanate whisker additions on the tensile, impact, and thermal properties of PC were investigated. Tensile tests showed that the stiffness of composites markedly improved with increasing whisker content. However, potassium titanate whiskers were ineffective to reinforce PC because these whiskers promoted chemical decomposition of PC matrix during compounding. Consequently, the torque values of PC/K 2 Ti 6 O 13 composites were much lower than that of PC. Moreover, torque measurements revealed that titanate coupling agent also facilitated decomposition of PC during blending. The mechanisms responsible for the degradation of PC matrix of the surface-treated PC/K 2 Ti 6 O 13 composites are discussed.

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