Materials Reports  2021, Vol. 35 Issue (z2): 465-469 |
| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Anionic Synthesis and Structure and Properties of Random Solution-polymerized Styrene/butadiene Rubber |
| LIAO Mingyi1, WANG Wenheng1, WANG Xu1, ZHANG Chunqing2
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1 Transportation Engineering College, Dalian Maritime University, Dalian 116026,China
2 School of Chemical Engineering, Dalian University of Technology, Dalian 116024,China |
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Abstract Solution-polymerized styrene/butadiene rubber (SSBR) has been synthesized by using styrene and butadiene as monomers, n-BuLi as initiator, cyclohexane as solvent and ditetrahydrofuran propane (DTHFP) as structure modifier via anionic living polymerization.The effects of St/Bd mass ratio and 1, 2-unit content on structure and properties were investigated. The microstructures, the molecular weight and molecular weight distribution, Tg, dynamic mechanical properties and mechanical properties of SSBR were characterized by1H nuclear magnetic resonance (1H-NMR), gel permeation chromatography (GPC), dynamic mechanic analysis (DMA) and universal material tester, respectively. The results showed that the SSBR structure was the random distribution, the content of 1,2-unit could be precisely controlled. The shore A hardness, tensile strength and stress at 100% of the vulcanized SSBR increased and the elongation at break decreased with increasing the St/Bd mass ratio. The tensile strength and elongation at break of the vulcanized SSBR decreased, and the Shore A hardness and stress at 100% did not change much with increasing the content of 1,2-unit. The DMA curves of the vulcanized SSBR gradually moved towards high temperature area, Tg increased, tanδmax first increased and then decreased with increasing the St/Bd mass ratio and the content of 1,2-unit. The damping temperature range increased with increasing the St/Bd mass ratio, but had little change with increasing the content of 1,2-unit.
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Published: 09 December 2021
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| About author:: Mingyi Liao obtained his B. E. degree in polymer chemical technology from the Dalian Institute of Technology and Ph. D. degree in chemistry from the Russian Moscow Institute of Fine Chemical technology in 1988—1993. He is currently a professor and doctoral supervisor. His research interests are rubber synthesis, preparation and application of liquid fluororubber,preparation of polymer/inorganic nanocomposite and so on. |
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