Molecular-hydrodynamic study of poly(N-methyl-N-vinylacetamide) macromolecules

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• 作者：G. M. Pavlov (1)
  O. V. Okatova (2)
  A. V. Mikhailova (1)
  N. N. Ul’yanova (2)
  I. I. Gavrilova (2)
  E. F. Panarin (2)
  
• 刊名：Polymer Science Series C
• 出版年：2010
• 出版时间：September 2010
• 年：2010
• 卷：52
• 期：1
• 页码：62-69
• 全文大小：335KB
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• 作者单位：G. M. Pavlov (1)
  O. V. Okatova (2)
  A. V. Mikhailova (1)
  N. N. Ul’yanova (2)
  I. I. Gavrilova (2)
  E. F. Panarin (2)
  
  1. Fock Research Institute of Physics, St. Petersburg State University, ul. Ul’yanovskaya 1, Petrodvorets, St. Petersburg, 198504, Russia
  2. Institute of Macromolecular Compounds, Russian Academy of Sciences, Bol’shoi pr. 31, St. Petersburg, 199004, Russia
  
• ISSN：1555-614X

文摘

High-velocity sedimentation, translational isothermal diffusion, and viscometry in H2O and DMF are used to investigate the samples and fractions of poly(N-methyl-N-vinylacetamide) synthesized by free-radical polymerization and fractionated in a chloroform-diethyl ether system. Molecular masses M and the Mark-Kuhn-Houwink-Sakurada relations are obtained for the fractions in the molecular mass range M × 10? = 3.5?40.0. The negative temperature coefficient of intrinsic viscosity is revealed for both solvents. The length of the Kuhn statistical segment and the hydrodynamic diameter of poly(N-methyl-N-vinylacetamide) macromolecules are estimated; the hydrodynamic volumes occupied by water-soluble poly(N-methyl-N-vinylacetamide), poly(1-vinyl-2-pyrrolidone), poly(vinylformamide), and pullulan molecules are compared.