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Reactivity ratios and sequence structures of the copolymers prepared by photo-induced copolymerization of MMA with MPMP

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Abstract

The copolymers were prepared by the photo-induced copolymerization of methyl methacrylate (MMA, M 1 ) with 4-methacryloyl-1,2,2,6,6-pentamethyl-piperidine (MPMP, M 2 ) in benzene solution at ambient temperature. The reactivity ratios for these monomers were measured by running a series of reactions at various feed ratios of initial monomers, and the copolymer compositions were determined by 1H NMR spectroscopy. The reactivity ratios of the monomers were found to be r 1  = 0.28 and r 2  = 1.63 by the application of extended Kelen-Tüdos method. The results showed that, MMA preferred to copolymerization while MPMP tended to homopolymerization in the copolymerization system. The sequence structures of the MMA/MPMP copolymers were characterized by 1H NMR spectroscopy. The backbone structures of the MMA/MPMP copolymers were mainly composed of a syndiotactic and an isotactic configuration. Three kinds of the sequences of rr, rr’ and lr’ in the syndiotactic configuration and two kinds of the sequences of km’ and mm’ as the isotactic configuration were found. The sequential distribution and the sequence-length distribution in the MMA/MPMP copolymers were also obtained.

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Acknowledgments

This work was supported by a grant from the National Nature Science Foundation of China (no. 20874022) and the Ph.D. Programs Foundation of Ministry of Education of the People’s Republic of China (no. 20094420110006).

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Authors and Affiliations

  1. Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter,Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, People’s Republic of China

    Junyi Zhou, Ting Zhang & Xiaoxuan Liu

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  1. Junyi Zhou
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  2. Ting Zhang
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  3. Xiaoxuan Liu
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Correspondence to Xiaoxuan Liu.

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Zhou, J., Zhang, T. & Liu, X. Reactivity ratios and sequence structures of the copolymers prepared by photo-induced copolymerization of MMA with MPMP. J Polym Res 21, 532 (2014). https://doi.org/10.1007/s10965-014-0532-2

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