Mechanical Properties of Styrene-Butadiene-Styrene Block Copolymer Composites Filled with Calcium Carbonate Treated by Liquid Polybutadienes

作者：Song Xuefang; Yoshino Hidetake; Shibata Hiroshi; Nagatani Asahiro; Ueda Yasukiyo^*

来源：Journal of Applied Polymer Science, 2009, 113(6): 3661-3670.

DOI：10.1002/app.30362

• composites
• elastomers
• fillers
• mechanical properties

The factors influencing the mechanical properties of styrene-butadiene-styrene block copolymer (SBS) composites filled with liquid polybutadiene (LB)-surface-treated calcium carbonate (CaCO(3)) were investigated with respect to the molecular structure of the LB, the amount of the LB adsorbed on the CaCO(3) surface, the heat treatment conditions, and the surface treatment method. The mechanical properties, such as the modulus, tensile strength at break, tear strength, storage modulus, and tension set, of the SBS composites were improved remarkably through the filling of CaCO(3) surface-treated with a carboxylated LB with a high content of 1,2-double bonds. The heat treatment of LB-CaCO(3) in air was also effective in enhancing such properties. When SBS, CaCO(3), and LB were directly blended (with the integral blend method), secondary aggregation of CaCO(3) place, and the mechanical properties of the composite were significantly lower. In the integral blend method, LB functioned as a plasticizer.

• 出版日期2009-9-15