Thermal Stability Improvement and Structural Change of Oil Gels Formed by Styrene-Butadiene-Styrene Triblock Copolymer Induced by Adding Poly(phenylene ether)  

作　　者：Kouichi Kato Yuki Tsukamoto Eri Hirai Yasuhiro Matsuda Shigeru Tasaka 

机构地区：[1]Department of Opto-Electronics and Nanostructure Science, Shizuoka University, Hamamatsu, Japan [2]Department of Materials Science and Chemical Engineering, Shizuoka University, Hamamatsu, Japan [3]Department of Applied Chemistry and Biochemical Engineering, Shizuoka University, Hamamatsu, Japan

出　　处：《Open Journal of Organic Polymer Materials》2014年第4期65-73,共9页有机高分子材料期刊（英文）

摘　　要：The thermal stability of oil gels formed by styrene-butadiene-styrene triblock copolymer (SBS) was improved by adding a small amount of poly(phenylene ether) (PPE), which has a higher glass transition temperature (Tg). In naphthenic oil which is a good solvent for the butadiene blocks, but a non-solvent for the styrene blocks and PPE, PPE was selectively included into styrene blocks in SBS, and induced the increase of the Tg of these blocks. The melting temperature determined by viscoelastic measurements and softening temperature of the gels were elevated by adding PPE, while no significant change was detected by adding polystyrene. The gel became opaque by adding PPE, and partially separated phases were observed by field emission scanning electron microscopy (FE-SEM). The dependence of the viscoelastic behavior on the PPE concentration can be explained by the structural change observed by FE-SEM.The thermal stability of oil gels formed by styrene-butadiene-styrene triblock copolymer (SBS) was improved by adding a small amount of poly(phenylene ether) (PPE), which has a higher glass transition temperature (Tg). In naphthenic oil which is a good solvent for the butadiene blocks, but a non-solvent for the styrene blocks and PPE, PPE was selectively included into styrene blocks in SBS, and induced the increase of the Tg of these blocks. The melting temperature determined by viscoelastic measurements and softening temperature of the gels were elevated by adding PPE, while no significant change was detected by adding polystyrene. The gel became opaque by adding PPE, and partially separated phases were observed by field emission scanning electron microscopy (FE-SEM). The dependence of the viscoelastic behavior on the PPE concentration can be explained by the structural change observed by FE-SEM.

关 键 词：Styrene-Butadiene-Styrene TRIBLOCK Copolymer Poly(phenylene ether) (PPE) OIL Gel Naphthenic OIL 

分 类 号：O6[理学—化学]