Intrinsic viscosity-molecular weight relationships in copolyphosphates.

• Bhargava H. N.

  Department of Chemistry, Gorakhpur University

• Sharma C. B.

  Department of Chemistry, Gorakhpur University

• Srivastava Rita Rani

  Department of Chemistry, Gorakhpur University

抄録

A number of samples of sodium potassium (Na:K=9:1 to 3:7) and lithium potassium (Li:K=9:1 to 5:5) copolyphosphates were prepared and characterized. Their number-average molecular weights were determined by end-group titration and intrinsic viscosities were determined in 0.035 N NaBr solution. Intrinsic viscosity–molecular weight relationships according to the Mark–Houwink equation were established for each series of compounds. A highly interesting feature of the results obtained was a decrease in the value of the constant a with an increase in the mole fraction of potassium in the copolyphosphates. This is a remarkable demonstration of the dependence of a on the degree of solvation; the solubilities of both kinds of copolyphosphates were found to decrease with an increase in the proportion of potassium.

収録刊行物

• Polymer Journal

  Polymer Journal 18 (8), 619-624, 1986

  The Society of Polymer Science, Japan

キーワード

• Sodium Potassium Copolyphosphates
• Lithium Potassium Copolyphosphates
• Intrinsic Viscosity
• Molecular Weight
• Mark–Houwink Equation

詳細情報

• CRID: 1390282681265890816
• NII論文ID: 130004428783
• DOI: 10.1295/polymj.18.619
• COI: 1:CAS:528:DyaL28XmtFOkurk%3D
• ISSN: 13490540
• ISSN: 00323896
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可