Abstract
We present here the application of one-dimensional and two-dimensional NMR techniques to characterize the structure of methoxyl end-functionalized polystyrenes (PS). The peaks in 1H-NMR spectra corresponding to main-chain, side-chain and chain-end groups are assigned by 1H-1H gCOSY, 1H-13C gHSQC and gHMBC spectra. For the first time, the spin-lattice relaxation time (T 1) of protons of the chain-ends is revealed to be affected more by polymer molecular weight (MW) than by the protons of the main-chains and the side-chains (almost independent from MW). As a result, a much higher delay time (d1) for chain-ends (d1 > 20T 1) is needed for quantitative NMR measurement when using end-group estimation method to obtain the MW of PS, which is in accordance with the value estimated by GPC. An improved method for the polymer MW determination is established, by combination of different NMR techniques to distinguish the peaks, and a large d1 setting to achieve quantitative NMR analysis.
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Rinaldi, P.L., “NMR spectroscopy of polymers in solution and in the solid state, Vol. 834”, ed. by Cheng H.N., English A.D., ACS Symposium Series, American Chemical Society, Washington DC, 2002, P. 94
Hatada, K. and Kitayama, T., “NMR spectroscopy of polymers”, Springer, New York, 2004
Piserchia, A., Zerbetto, M., Salvia, M.V., Salassa, G., Gabrielli, L., Mancin, F., Rastrelli, F. and Frezzato, D.J., Phys. Chem., 2015, 119(34): 20100
Li, L., Zhang, B., Wyzgoski, F., Li, X., McCord, E.F. and Rinaldi, P.L., ACS Macro Lett., 2013, 2(2): 141
Tanaka, K., Oouchi, M., Hayashi, F., Maeda, H. and Waki, H., Macromolecules, 2016, 49(15): 5750
Luo, X., Xie, S., Huang, W., Dai, B., Lu, B. and Yan, D., Chinese J. Polym. Sci., 2016, 34(1): 77
Li, L., Xiong, C. and Chen, D., Chinese J. Polym. Sci., 2016, 34(5): 594
Li, X., McCord, E.F., Baiagern, S., Fox, P., Howell, J.L., Sahoo, S.K. and Rinaldi, P.L., Magn. Reson. Chem., 2011, 49(7): 413
Gong, X., Hansen, E.W. and Chen, Q., Macromol. Chem. Phys., 2011, 212(10): 1007
Ye, Y., Liu, X., Xu, G., Liu, M. and Li, C., Angew. Chem. Int. Ed., 2015, 54(18): 5328
Hatada, K., Kitayama, T., Ute, K., Terawaki, Y. and Yanagida, T., Macromolecules, 1997, 30(22): 6754
Sunder, A., Mülhaupt, R. and Frey, H., Macromolecules, 2000, 33(2): 309
Päch, M., Zehm, D., Lange, M., Dambowsky, I., Weiss, J. and Laschewsky, A., J. Am. Chem. Soc., 2010, 132(25): 8757
Boschet, F., Ono, T. and Ameduri, B., Macromol. Rapid Commun., 2012, 33(4): 302
Ren, Y., Wei, Z., Leng, X., Wang, Y. and Li, Y., Polymer, 2015, 78: 51
Chen, S., Chen, D., Lu, M., Zhang, X., Li, H., Zhang, X., Yang, X., Li, X., Tu, Y. and Li, C.Y., Macromolecules, 2015, 48(23): 8480
Wang, M., Wang, T., Yuan, K. and Du, J., Chinese J. Polym. Sci., 2016, 34(1): 44
Chen, J., Chen, D., Huang, W., Yang, X., Li, X., Tu, Y. and Zhu, X., Polymer, 2016, 107: 29
Seger, M.R. and Maciel, G.E., Anal. Chem., 2004, 76(19): 5734
Farrar, T.C. and Becker, E.D., “Pulse and Fourier transform NMR”, Academic Press, New York, 1969
Pauli, G.F., Jaki, B.U. and Lankin, D.C., J. Nat. Prod., 2005, 68(1): 133
Mambrini, G.P., Ribeiroa, C. and Colnago, L.A., Magn. Reson. Chem., 2012, 50(1): 1
Heatley, F. and Wood, B., Polymer, 1978, 19(12): 1405
Fang, T., Macromolecules, 1990, 23(21): 4553
Roy, D., Basu, P.K., Raghunathan, P. and Eswaran, S.V., Magn. Reson. Chem., 2004, 42(1): 76
Xu, Q., Chen, J., Huang, W., Qu, T., Li, X., Li, Y., Yang, X. and Tu, Y., Macromolecules, 2013, 46(18): 7274
Nguyen, T.B.T., Nguyen, T.T.C., Tra, H.C., Nguyen, C.K. and Tran, N.Q., Int. J. Polym. Anal. Charact., 2015, 20(1): 57
Wang, J.S. and Matyjaszewski, K., J. Am. Chem. Soc., 1995, 117(20): 5614
Kato, M., Kamigaito, M., Sawamoto, M. and Higashimura, T., Macromolecules, 1995, 28(5): 1721
Lutz, J.F. and Matyjaszewski, K., Macromol. Chem. Phys., 2002, 203(10-11): 1385
Lutz, J.F. and Matyjaszewski, K., J. Polym. Sci., Part A: Polym. Chem., 2005, 43(4): 897
Gao, L., Oh, J., Chang, T., Chen, D., Li, X., Yang, X., Tu, Y., Zhu, X. and Li, C.Y., Polymer, 2016, 101: 379
Brandolini, A.J., Hills, D.D. and Vickers, T.J., “NMR spectra of polymers and polymer additives”, Marcel Dekker, Inc., New York, 2000
Kitayama, T., Hirano, T. and Hatada, K., Polym. J., 1996, 28(1): 61
Bax, A., Freeman, R. and Kempsell, S.P., J. Am. Chem. Soc., 1980, 102(14): 4849
Bodenhausen, G. and Ruben, D., J. Chem. Phys. Lett., 1980, 69(1): 185
Huang, W., Wan, Y., Chen, J., Xu, Q., Li, X., Yang, X., Li, Y. and Tu, Y., Polym. Chem., 2014, 5(3): 945
Bax, A. and Summers, M.F., J. Am. Chem. Soc., 1986, 108(8): 2093
Simeral, L.S., Appl. Spectrosc., 1995, 49(3): 400
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This work was financially supported by the National Natural Science Foundation of China (Nos. 21274099, 21305098 and 21474067) and the Priority Academic Program Development of Jiangsu High Education Institutions.
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Precise Molecular Weight Determination and Structure Characterization of End-functionalized Polymers: An NMR Approach via Combination of One-dimensional and Two-dimensional Techniques
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Chen, Dx., Gao, Lf., Li, Xh. et al. Precise molecular weight determination and structure characterization of end-functionalized polymers: An NMR approach via combination of one-dimensional and two-dimensional techniques. Chin J Polym Sci 35, 681–692 (2017). https://doi.org/10.1007/s10118-017-1919-4
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DOI: https://doi.org/10.1007/s10118-017-1919-4