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Synthesis and characterization of random styrene–butadiene copolymer with Nd-based catalyst

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Abstract

Random styrene (St)–butadiene (Bd) copolymer (SBR) was obtained with the catalyst system composed of Nd(P507)3, methylaluminoxane (MAO) and indene. This Nd-based catalyst system showed high activity and selectivity toward the copolymerization. Indene was proven to be the critical component to achieve the high content of St units (~33.0 %). Raising the polymerization temperature was beneficial to enhance the coordination of St to the active center, affording the increased yield and number-average molecular weight (M n ) of SBR. The polymers obtained in aliphatic solvents possessed higher M n than M n of SBR generated in toluene. The composition of SBR was controllable by adjusting the feed ratio of St/Bd. NMR and DSC analysis illustrated that the copolymers sustained random distribution even when St incorporation in SBR was up to 33.0 %. SBR was fully characterized by NMR, FTIR, GPC and DSC analysis.

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Acknowledgements

This work was financially supported by The National Basic Research Program of China (973 program), Grant No. 2015CB654701; The National Nature Science Foundation of China, project Nos. 21404019, 21034001, 21174021; The China Postdoctoral Science Foundation, project No. 2014M550154; and The Fundamental Research Funds For The Central Universities, project No. DUT14RC(3)031.

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Authors and Affiliations

  1. The State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, Liaoning, China

    Tingting Li, Yang Li, Gongqiang He, Zhenghai Shi, Yanming Hu, Fang Guo, Yurong Wang, Kaihua Shen, Zhiyong Wei, Hongwei Ma, Yuan Cheng & Yanshai Wang

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  1. Tingting Li
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  2. Yang Li
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  3. Gongqiang He
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Correspondence to Yang Li.

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Li, T., Li, Y., He, G. et al. Synthesis and characterization of random styrene–butadiene copolymer with Nd-based catalyst. Polym. Bull. 73, 509–518 (2016). https://doi.org/10.1007/s00289-015-1503-4

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  • DOI: https://doi.org/10.1007/s00289-015-1503-4

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