Tacticity, molecular weight, and molecular-weight-distribution relationships in stereoregular polyacrylonitrile prepared by electron beam irradiation canal polymerization |
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Authors: | M. Minagawa Y. Okada K. Nouchi Y. Sato F. Yoshii |
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Affiliation: | (1) Department of Materials Science and Engineering, Faculty of Engineering, Yamagata University Yonezawa 992-8510, Japan, JP;(2) ACT Research Co. Ltd., Nagoya Branch Office, Nagoya 450–0002, Japan, JP;(3) Takasaki Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute, Takasaki 370-1292 Japan, JP |
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Abstract: | The preparation and characterization of stereoregular isotactic polyacrylonitrile (PAN) by electron beam (EB) irradiation on a urea canal complex are described. The EB method has several advantages over the ordinary γ-ray irradiation method: a very short polymerization time is needed (within a few seconds) and EB irradiation is carried out intermittently, and so all the polymer properties can be studied as a function of the EB irradiation dose. The structure–properties relationships of PAN, such as intrinsic viscosity versus the number-average molecular weight and the viscosity versus the isotacticity range were clarified. Significant information for the optimization of the tacticity of PAN was extracted. Received: 23 August 1999 Accepted : 10 January 2000 |
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Keywords: | Isotactic polyacrylonitrile Canal polymerization Electron beam irradiation Structure properties relationships |
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