Mechanical and thermal properties of polycarbonate. II. Influence of titanium dioxide content and quenching on pigmented polycarbonate

✍ Scribed by F. Rouabah; M. Fois; L. Ibos; A. Boudenne; D. Dadache; N. Haddaoui; P. Ausset

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 219 KB
• Volume: 106
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.26807

✦ Synopsis

Abstract

The effects of quenching temperature including different thermal histories on mechanical, physical, and thermal properties of pigmented polycarbonate (PC/TiO~2~) were investigated. Tensile test, Izod impact strength and heat distortion temperature (HDT) were performed on specimens of 3 mm thickness. Pigment content and quenching temperature are two key factors that affect the properties of the materials. A higher content of pigments results in an increase of modulus of elasticity and a decrease of unotched and notched Izod impact strength, as well as elongation at break. A maximum of yield stress and HDT is obtained at 3% of TiO~2~, which was considered as the optimum level of pigment. An additional second quenching at 40°C has allowed to improve Izod impact strength and elongation at break of specimens with 3% of TiO~2~; whereas modulus of elasticity, density, yield stress, and HDT were minimum at this quenching temperature. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007