RADIATION-INDUCED SOLID STATE POLYMERIZATION OF TETRAOXANE
The radioinduced polymerization of tetraoxane is reported and compared with that of trioxane. Under gamma irradiation at 80 deg C and at a dose rate of 2.5 x 10/sup 4/ r/hr, tetraoxane became gradually opaque. After 18 hr irradiation a polymer crystal with the shape of the monomer crystal was obtained at 94% conversion. However, no polymer was obtained in the melt or in solution. The polymerization proceeded at a considerably high rate. The conversion was linear during irradiation and was completed after 20 hr irradiation at 80 deg C. The rate of polymerization was much larger than the maximum rate for trioxane at 55 to 60 deg C. A conversion of 100% was easily attained compared to the difficulty in the polymerization of trioxane where a yield of 70 to 80% was attained only in larger crystals. G-values for monomer disappearance in the two monomers at the maximum rate of polymerization were G (tetraoxane), 7 x 10/sup 4/ (100 deg C) and G (trioxane), 8 x 10/sup 3/ (55 deg C). (P.C.H.)
- Research Organization:
- Japanese Assn. for Radiation Research on Polymers, Osaka
- NSA Number:
- NSA-17-034016
- OSTI ID:
- 4669200
- Journal Information:
- J. Polymer Sci., Pt. B, Journal Name: J. Polymer Sci., Pt. B Vol. Vol: 1
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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