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Topological structure and molecular mobility of linear and branched poly(meth)acrylates studied by NMR relaxation

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Abstract

The method for the determination of fractions of terminal chains and chains bonded by physical or chemical knots from free induction decays (FID) and line shape was proposed on the basis of the earlier developed theory of NMR spectra in linear and cross-linked polymers. The density and topological structure of the effective polymer network and the characteristic correlation times of segmental motion of chains were determined for linear and branched poly(meth)acrylates at 130 °C from the coincidence of the theoretical and experimental FID curves and the line shape. A quantitative estimation of chain rigidity in the branched polymer with an increase in the brancher content was performed for the first time.

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1 prosp. Akad. Semenova, 142432, Chernogolovka, Moscow Region, Russian Federation

    T. P. Kulagina, S. V. Kurmaz, V. P. Grachev & V. P. Tarasov

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  1. T. P. Kulagina
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  2. S. V. Kurmaz
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  3. V. P. Grachev
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  4. V. P. Tarasov
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Correspondence to T. P. Kulagina.

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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1475–1479, July, 2011.

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Kulagina, T.P., Kurmaz, S.V., Grachev, V.P. et al. Topological structure and molecular mobility of linear and branched poly(meth)acrylates studied by NMR relaxation. Russ Chem Bull 60, 1500–1504 (2011). https://doi.org/10.1007/s11172-011-0223-7

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  • DOI: https://doi.org/10.1007/s11172-011-0223-7

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