放射線固相重合法により合成したポリアクリロニトリルの立体規則性

概要

論文の詳細を見る
The stereoregularity of poly(acrylonitrile)(PAN) prepared by γ-irradiation was discussed in relation to the urea canal polymerization process in the solid state. The sample preparation process consists of three elementary steps; (I) canal complex formation, (II) γ-irradiation, followed by (III) isolation. The effect of experimental factors on the stereoregularity of PAN was studied in detail. The stereoregularity was discussed based on high resolution 13C NMR spetcra. The l3C NMR spectra showed that urea canal PAN is essentially isotactic, and little evidence for syndiotactic configuration was obtained. The extent of isotacticity was directly determined from the peak intensity of methine (CH) carbon. Further detailed information on molecular structure (i.e., stereosequence) was obtained from the nitrile (CN) carbon peak. The optimum polymerization conditions ensuring highly stereoregular sample over 80% isotacticity were disclosed experimentally. The emphasis was laid on the significance of post-polymerization method in connection with the destruction of the canal complex during the irradiation.
山形大学の論文
1993-01-30