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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| Institution: | (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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