A Theory on the Relationship between Viscosity and Molecular Weight in Bulk Polymers

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概要

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• A statistical mechanical theory of steady viscosity in bulk polymers is presented.In slowly relaxing phenomena such as steady viscosity, the inter-chain relaxation is predominant and the segmental conformation of each polymer molecule attains to a state of dynamic equilibrium. It is assumed tbat the intermolecular force between two molecules consists of two parts: the force derived from potential and the friction due to entanglements between them. The general expression of viscosity is derived from the fundamental equation for the velocity distribution function of a polymer molecule, using Born-Green's method. The molecular weight dependence of viscosity η is roughly estimated by taking into account the inner structure and conformation of polymer molecules. The result is η=C_1N+0_2N^3, where N is the number of segments constituting a polymer molecule, C_1 and C_2 are constants, and C_1≫0_2. This prediction agrees semi-quantitatively with experiment.

• 社団法人日本物理学会の論文
• 1964-01-05

著者

• Chikahisa Yoshiaki

  Department Of Physics Faculity Of Science Tokyo Metropolitan University

• Chikahisa Y.

  Department of Physics, Faculity of Science, Tokyo Metropolitan University

関連論文

• Non-Newtonian Intrinsic Viscosity of Coiled Chain Polymers. : II.. Molecular Expansions and Solvent Effect
• A Theory on the Relationship between Viscosity and Molecular Weight in Bulk Polymers

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