Item 1
GPEC 2004: Plastics - Helping Grow A Greener Environment. Proceedings of a conference held Detroit, Mi., 18th 19th Feb. 2004.
Brookfield, Ct., SPE, 2004, Paper 27, pp. 6, CD-ROM, 012
AROMATIC HYDROCARBON CONTENT OF COMMON PLASTIC PACKAGING MATERIALS
Ezrin M; Lavigne G
Connecticut, University
(SPE, Environmental Div.)

Various plastics packaging materials containing readily detected levels of aromatic hydrocarbons were subjected to supercritical fluid extraction with carbon dioxide to remove the hydrocarbons and then exposed to atmosphere to allow them to reabsorb hydrocarbons from the air either in a flask or garage. The plastics packaging materials were analysed before extraction, after extraction and after exposure to hydrocarbons in the atmosphere by thermal desorption gas chromatography/mass spectroscopy using heat to evolve volatile compounds onto the chromatography column. The materials were found to absorb hydrocarbons from the atmosphere. The most likely source of the absorbed hydrocarbons was identified as gasoline vapours.

USA

Accession no. 923279

Item 2
GPEC 2004: Plastics - Helping Grow A Greener Environment. Proceedings of a conference held Detroit, Mi., 18th 19th Feb. 2004.
Brookfield, Ct., SPE, 2004, Paper 49, pp. 10, CD-ROM, 012
DEVULCANIZATION OF RECYCLED TIRE RUBBER USING SUPERCRITICAL CARBON DIOXIDE
Tzoganakis C; Zhang Q
Waterloo, University
(SPE, Environmental Div.)

An investigation was carried out into the devulcanisation of crumb rubber from recycled truck tyres in a twinscrew extruder into which supercritical carbon dioxide was injected to swell the crumb rubber. The effects of the supercritical carbon dioxide on extrusion and of processing conditions (flow rate, carbon dioxide...