Graft Polymerization of Acrylonitrile on Polyethylene and Polypropyrene by the Technique of Pre-irradiation in Vacuum
Test results of the temperature effects and the relationing ratio on the graft polymerization induced by adding the monomer to the polyethylene film, irradiated in a vacuum, are discussed. A 1500-c Co60 gamma -ray source was used. Pre-irradiation dosages up to 10 Mrep at the rate of 1.2 x 105 rep/ hr in the temperature range of 0 to 105°C were used. The grafting ratio (wt- %) increased randomly or proportionally for low or high density samples, respectively, with respect to temperature. It was concluded that the grafting ratio was proportional to the concentration of the trapped free radicals in the irradiated polyethylene. The long lifetime free radical concentration increased with dosage for a wide range of irradiation times but was inactive at low grafting temperatures. However, the short lifetime free radical concentration became constant above a certain irradiation dosage and was reactive at low temperatures. The grafting ratio decreased with increasing time elapsing before the addition of the monomer after irradiation and was more pronounced at higher grafting temperatures.
- Research Organization:
- Originating Research Org. not identified
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-004607
- OSTI ID:
- 4770520
- Journal Information:
- Kobunshi Kagaku (Chemistry of High Polymers), Journal Name: Kobunshi Kagaku (Chemistry of High Polymers) Journal Issue: 203 Vol. 19; ISSN 0023-2556
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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