有機化クレー分散SBSの物性に及ぼすブレンド法の影響
2003 年 76 巻 11 号 p. 399-404
詳細
2003 年 76 巻 11 号 p. 399-404
Styrene-butadiene-styrene triblock copolymer (SBS) composites dispersed with organoclay (stearyl ammonium-modified montmollironite, C18-Mt) were prepared by the melt-mixing method, and the solution-mixing (as-cast and melt-press) methods. The structures of the composites were evaluated using X-ray diffractmeter (XRD), scanning electron microscopy (SEM), dynamic mechanical analysis (DMA), and tensile properties of the composites were examined.
The composites by the melt-mixing method have partially intercalated structure. In the composites, large agglomerates (about 30μm) and small aggregates (several hundred nm) were observed. Whereas, the composites with less than 3wt% C18-Mt by the as-cast method have intercalated structure, and those with more than 5wt% C18-Mt have intercalated structure after melt-pressing at 130°C. In the composites, small particles (about 1μm) were dispersed uniformly. As the results of DMA, it was found that C18-Mt inhibited polystyrene aggregate in the composites by the melt-press method. Tensile moduli of the composites by preparing the melt-press method were higher than those of the composites by the melt-mixing method and increased with increasing C18-Mt content. Tensile properties at break of the composites by the both methods decreased with increasing C18-Mt content compared with SBS control.
