Home > Archive>Volume 50, Issue 6, 2020 >82-84. DOI:10.12044/j.issn.1007-2330.2020.06.012
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Molecular Mass Characteristic and Hydrodynamic Properties of Polycarbosilane
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Aerospace Research Institute of Material & Processing Technology，Beijing 100076

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TQ174.1

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    Abstract:

    In order to obtain the molecular structure，the of polycarbosilanes relationship between molecular hydrodynamics and molecular mass and the concentration dependence of reduced viscosity have been investigated.The results indicated that for PCS，absolute weight-average molecular mass Mw=1.098×104 g/mol，molecular weight distribution MWD=6.7，the second virial coefficient A2=1.57×10-3 cm3·mol/g2，Huggins constant k’=1.85，the scaling exponent b between hydrodynamic radius and molecular mass=0.21.At normal atmospheric temperature，tetrahydrofuran（THF） is a thermodynamically good solvent for PCS.And PCS macromolecules are characterized by compact structure which is not in according with the characteristics of linear polymers.

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History
  • Received:April 13,2020
  • Revised:November 11,2020
  • Adopted:April 15,2020
  • Online: January 15,2021
  • Published: December 30,2020
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