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Influence of "Historical Effects" on the Rheological Properties of a Polyacrylonitrile Copolymer Solution

Ri-guang Jin 1 Huibo Zhang 2 Shuang Kun Zhang 1 Wei Wei Liu 1 Jing Wang 1 Run Cheng 1 류성곤 3 Ri Guang Jin 1

1Beijing University of Chemical Technology
2Beijing University of Chemical Technolog
3충남대학교

Accredited

ABSTRACT

Polyacrylonitrile (PAN) copolymers of different molecular weights were synthesized by a suspension polymerization and precipitation polymerization method. The rheology behaviors of the synthesized PAN copolymers were investigated in relation to their molecular weight,solid content and melting temperature. The influence of “historical effects” on the spinning solution of PAN was studied by analyzing the laws of viscosity considering the diversification time and temperature. The viscosity disciplines of each spinning solution conformed well to the rheological universal laws in a comparison of the suspension polymerization product with that of precipitation polymerization. Viscosity changes in the swelling process of dissolution were gentler in the suspension polymerization product; a small amount of water will quickly debase the solution viscosity, and high-speed mixing can greatly shorten the time required by the spinning solution to reach the final viscosity.

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