TWO DIFFERENT POLYMERIZATION MECHANISMS OF ACRYLONITRILE INITIATED BY $gamma$-IRRADIATION
The polymerization of acrylonitrile induced by ionizing radiation was investigated in bulk in the temperature range 15 to --196 deg C. It was found that two different mechanisms could exist in the polymerization under the same conditions in different temperature regions. The two polymerization phenomena at room and at very low temperatures were studied from the point of view of radical and ionic polymerization mechanisms. In solid state polymerization at very low temperatures the following results were obtained: first, the activation energy is very low, i.e., ca. 0.4 kcal/ mole; second, an induction period was not observed under various conditions; third, the monomer containing a radical scavenger was easily polymerized. The described facts indicate that polymerization in the solid state should proceed by an ionic mechanism. (auth)
- Research Organization:
- Univ. of Tokyo
- NSA Number:
- NSA-14-013762
- OSTI ID:
- 4172455
- Journal Information:
- J. Polymer Sci., Journal Name: J. Polymer Sci. Vol. Vol: 43
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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