RADIATION INDUCED IONIC POLYMERIZATION OF BUTADIENE
The radioinduced polymerization of both liquid and solid butadiene was investigated in the temperature range -20 to -196 deg . Polymer samples in the temperature range gave almost identical infrared absorption spectra. It was estimated from the spectrum that 67% of the double bonds are due to trans-1,4- monomer units and 32% to vinyl groups. The radioinduced polymerization rate of the liquid monomer at relatively low temperatures increases with decreasing temperatures (activation energy = -0.4 kcal/mole), and indicates that the reaction proceeds by an ionic mechanism. On the other hand, the polymerization rate of the solid monomer decreases slightly with decreasing temperature (activation energy about 0.1 kcal/mole), which suggests that the liquid and solid state polymerizations have different propagation and termination mechanisms, even if the polymerizations proceed by the same ionic mechanism. It was concluded, though, that the solid state polymerization proceeds by an ionic mechanism. The polymerization of butadiene was not inhibited by oxygen or DPPH. (P.C.H.)
- Research Organization:
- Tokyo Univ.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-030736
- OSTI ID:
- 4834201
- Journal Information:
- Journal of Physical Chemistry (U.S.), Journal Name: Journal of Physical Chemistry (U.S.) Vol. Vol: 65; ISSN JPCHA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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