Study on the Internal Motions of Some Acryl- and Methacryl-group High Polymers by Pulsed NMR Method

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概要

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• The internal motions of some high polymers were investigated by measuring the spin-lattice relaxation time (T_1) together with its minima (T_<1 min>) in proton resonance in the temperature range from liquid air up to about 300C by pulsed NMR method at 25 Mc/sec. For acryl-group high polymers (PMA, PEA, PEA), two minima of T1 were observed, one at higher temperature corresponding to the segmental motion and the other at lower temperature to the internal motion of side chain ester alkyl group. For methacryl-group high polymers (PMMA, PEMA, PBMA), three minima of T_1 were observed, of which one at the highest temperature corresponds to the segmental motion, the next at the middle temperature to the internal motion of both main chain methyl group and side chain ester alkyl group and the last at the lowest temperature to the internal motion of the latter group alone. Thus, we could definitely separate the internal motion of amorphous high polymers. The rigorous analysis of the behavior is considered to be a rather difficult problem, because of the complexity of the circumstances and the lack of both existing suitable formulas and precise experimental data.

• 社団法人日本物理学会の論文
• 1961-06-05

著者

• Kawai Takao

  Yoshida College

• Kawai Takao

  Yoshida College Kyoto University

関連論文

• Measurement of Temperature Dependence of T_1 of Proton in Some High Polymers by Pulsed NMR Technique
• Effects of Tacticity upon the Temperature Dependence of T_1 of Proton in High Po1ymers
• Study on the Internal Motions of Some Acryl- and Methacryl-group High Polymers by Pulsed NMR Method
• A Study of Sorbed Water on Cellulose by Pulsed NMR Technique

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