<p> The polymerization of styrene initiated with gamma radiation
as well as thermal initiation was studied at temperatures, 150, 155,
160, 165, 180 and 200C and dose rates of 0.072-0.1836 M Rads/hour.
In all cases the reactions were studied up to 100% conversion and the
following results were obtained. (1) Rate of polymerization was independent of dose rate.
(2) 165C was considered to be the temperature at which the
radiation polymerization system in the case of styrene
reaches a limiting rate of initiation caused by high
temperature and dose rate.
(3) Self-production of ethynylbenzene in the system at 200C
probably caused retardation of the initial rate of
polymerization.
(4) No significant gel effect was observed in the investigated
temperature range.
(5) Polystyrene produced by radiation at high temperatures
has a very low average molecular weight.
(6) A general mechanism was proposed based on the characteristics
of the reactions.
(7) A temperature range was proposed as an optimal reaction
temperature for radiation polymerization of styrene. </p> / Thesis / Master of Engineering (MEngr)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/20886 |
| Date | 03 1900 |
| Creators | Taherzadeh, Mesbah |
| Contributors | Hodgins, J. W., Chemical Engineering |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
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