OJOPM  Vol.4 No.4 , October 2014
Thermal Stability Improvement and Structural Change of Oil Gels Formed by Styrene-Butadiene-Styrene Triblock Copolymer Induced by Adding Poly(phenylene ether)
Abstract: 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.
Cite this paper: Kato, K. , Tsukamoto, Y. , Hirai, E. , Matsuda, Y. and Tasaka, S. (2014) Thermal Stability Improvement and Structural Change of Oil Gels Formed by Styrene-Butadiene-Styrene Triblock Copolymer Induced by Adding Poly(phenylene ether). Open Journal of Organic Polymer Materials, 4, 65-73. doi: 10.4236/ojopm.2014.44009.

[1]   Laurer, J.H., Bukovnik, R. and Spontak, R.J. (1996) Morphological Characteristics of SEBS Thermoplastic Elastomer Gels. Macromolecules, 29, 5760-5762.

[2]   Laurer, J.H., Mulling, J.F., Khan, S.A., Spontak, R.J., Lin, J.S. and Bukovnik, R. (1998) Thermoplastic Elastomer Gels. II. Effects of Composition and Temperature on Morphology and Gel Rheology. Journal of Polymer Science Part B: Polymer Physics, 36, 2513-2523.<2513::AID-POLB5>3.3.CO;2-6<2513::AID-POLB5>3.0.CO;2-T

[3]   Laurer, J.H., Mulling, J.F., Khan, S.A., Spontak, R.J. and Bukovnik, R. (1998) Thermoplastic Elastomer Gels. I. Effects of Composition and Processing on Morphology and Gel Behavior. Journal of Polymer Science Part B: Polymer Physics, 36, 2379-2391.<2379::AID-POLB13>3.0.CO;2-0<2379::AID-POLB13>3.0.CO;2-0

[4]   Dürrschmidt, T. and Hoffmann, H. (2001) Organogels from ABA Triblock Copolymers. Colloid & Polymer Science, 279, 1005-1012.

[5]   Walker, T.A., Semler, J.J., Leonard, D.N., van Maanen, G.J., Bukovnik, R.R., Spontak, R.J. (2002) ABA Triblock Copolymer Gels Modified with an A-Compatible Semicrystalline Homopolymer. Langmuir, 18, 8266-8270.

[6]   Sugimoto, M., Sakai, K., Aoki, Y., Taniguchi, T., Koyama, K. and Ueda, T. (2009) Rheology and Morphology Change with Temperature of SEBS/Hydrocarbon Oil Blends. Journal of Polymer Science Part B: Polymer Physics, 47, 955-965.

[7]   Chantawansri, T.L., Duncan, A.J., Ilavsky, J., Stokes, K.K., Berg, M.C., Mrozek, R.A., Lenhart, J.L., Beyer, F.L. and Andzelm, J.W. (2011) Phase Behavior of SEBS Triblock Copolymer Gels. Journal of Polymer Science Part B: Polymer Physics, 49, 1479-1491.

[8]   Paglicawan, M.A., Balasubramanian, M. and Kim, J.K. (2007) Study on Nanocomposite Thermoplastic Elastomer Gels. Macromolecular Symposia, 249-250, 601-609.

[9]   Kotaka, T. (1973) Rheological Properties of Solutions of Butadiene-Styrene Copolymers of Varying Microstructure. Journal of Rheology, 17, 587.

[10]   Tuzar, Z., Petrus, V. and Kratochvíl, P. (1974) Sedimentation and Light Scattering Study of Block Copolymer Association. Die Makromolekulare Chemie, 175, 3181-3192.

[11]   Navarro, F.J., Martínez-Boza, F.J., Partal, P., Gallegos, C., Munoz, M.E., Areizaga, J. and Santamaría, A. (2001) Effect of Processing Variables on the Linear Viscoelastic Properties of SBS-Oil Blends. Polymer Engineering & Science, 41, 2216-2225.

[12]   Machida, S., Takahashi, N., Matsuda, Y. and Tasaka, S. (2009) Aggregation Behavior of the Styrene Units in Oil Gel of Styrene-Butadiene-Styrene Triblock Copolymer. Nihon Reoroji Gakkaishi, 37, 25-29.

[13]   Wardlaw, K.R. and Shuler, S. (1992) Polymer Modified Asphalt Binders. ASTM International, West Conshohocken.

[14]   Kamiya, S., Tasaka, S., Zhang, X., Dong, D. and Inagaki, N. (2001) Compatibilizer Role of Styrene-Butadiene-Styrene Triblock Copolymer in Asphalt. Polymer Journal, 33, 209-213.

[15]   Mazard, C., Benyahia, L. and Tassin, J.F. (2003) Dynamic Mechanical Properties of Polystyrene-Based Block Copolymers Blended with Poly(2,6-dimethyl-1,4-phenylene oxide). Polymer International, 52, 514-521.

[16]   Dikshit, A.K. and Kaito, A. (2003) Crystallization and Orientation Behaviors in Isotactic Polystyrene and Poly(2,6-dimethylphenylene oxide) Blends. Polymer, 44, 6647-6656.

[17]   Mutsuda, M. and Omae, H. (2004) Morphological Transition of the Regular Structure of Poly(styrene-block-butadiene-block-styrene) at the Interface with Poly(xylenyl ether). Macromolecules, 37, 3346-3352.

[18]   Puskas, J.E., Kwon, Y., Altstadt, V. and Kontopoulou, M. (2007) Blends of Poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) with Polystyrene-Based Thermoplastic Rubbers: A Comparative Study. Polymer, 48, 590-597.

[19]   Oyama, H.T., Sekikawa, M. and Shida, S. (2012) Effect of the Interface Structure on the Morphology and the Mechanical, Thermal, and Flammability Properties of Polypropylene/Poly(phenylene ether)/Magnesium Hydroxide Composites. Polymer Degradation and Stability, 97, 755-765.

[20]   Robertson, C. and Wilkes, G. (2000) Physical Aging Behavior of Miscible Blends Containing Atactic Polystyrene and Poly(2,6-dimethyl-1,4-phenylene oxide). Polymer, 41, 9191-9204.

[21]   Lovera, D., Ruckdaschel, H., Goldel, A., Behrendt, N., Frese, T., Sandler, J.K.W., Altstadt, V., Giesa, R. and Schmidt, H.W. (2007) Tailored Polymer Electrets Based on Poly(2,6-dimethyl-1,4-phenylene ether) and Its Blends with Poly- styrene. European Polymer Journal, 43, 1195-1201.

[22]   Araki, Y., Hori, Y., Suzuki, K., Shirai, H., Kato, K. and Saito, H. (2014) Flexible and Flame-Retardant S-SEB-S Triblock Copolymer/PPE Nano-Alloy. Journal of Applied Polymer Science, 131, Published Online.

[23]   Saron, C. and Felisberti, M.I. (2004) Dynamic Mechanical Spectroscopy Applied to Study the Thermal and Photodegradation of Poly(2,6-dimethyl-1,4-phenylene oxide)/High Impact Polystyrene Blends. Materials Science and Engineering: A, 370, 293-301.

[24]   Creton, C., Halary, J. and Monnerie, L. (1999) Plasticity of Polystyrene-Poly(2,6,dimethy1,1,4,phenylene oxide) Blends. Polymer, 40, 199-206.

[25]   Brandrup, J., Brandrup, J., Immergut, E.H., Grulke, E.A., Abe, A. and Bloch, D.R. (2003) Polymer Handbook. 4th Edition, John Wile & Sons Inc., New York.

[26]   The Solubility Parameter of Naphthenic Oil Was Provided from the Supplier.