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Permeability of plastic films to methyl bromide: A comparative laboratory study
Year:
1998
Source of publication :
Pesticide Science
Authors :
Beniches, Marina
;
.
Gamliel, Abraham
;
.
Grinstein, Avi
;
.
Volume :
53
Co-Authors:
Gamliel, A., Lab. for Pest Management Application, ARO The Volcani Center, Bet Dagan 50250, Israel
Grinstein, A., Lab. for Pest Management Application, ARO The Volcani Center, Bet Dagan 50250, Israel
Beniches, M., Lab. for Pest Management Application, ARO The Volcani Center, Bet Dagan 50250, Israel
Katan, J., Lab. for Pest Management Application, ARO The Volcani Center, Bet Dagan 50250, Israel
Fritsch, J., Lab. for Pest Management Application, ARO The Volcani Center, Bet Dagan 50250, Israel
Ducom, P., Lab. for Pest Management Application, ARO The Volcani Center, Bet Dagan 50250, Israel
Facilitators :
From page:
141
To page:
148
(
Total pages:
8
)
Abstract:
The permeability of plastic films to the fumigant methyl bromide (MB) was measured by two different methods, in order to facilitate the selection of films which are impermeable to the gas. Polyethylene-based films are highly permeable to MB, as evidenced by both methods. In contrast, multilayer coextruded films which have a layer of barrier material such as polyamide (PA) or ethylene-vinyl alcohol copolymer (EVOH) were significantly less permeable to MB, as reflected by the parameters permeability rate, time to 90% concentration (TC90, by the diffusion method) and lag-time values (by the variable-volume method). A significant correlation was found between the permeability rate assessed by the diffusion method and that obtained with the variable-volume method. Permeability of all films increased with temperature as evidenced by all tested parameters. This increase was more pronounced with polyethylene films, the permeabilities of which increased five-to six-fold when the temperature was increased from 20°C to 60°C. The effect of temperature on barrier-film permeability was less significant. Permeability of films to MB was affected by additional factors such as additives, the length of the monomer side-chain, and the thickness and density of polyethylene films.
Note:
Related Files :
Barrier films
diffusion
ethylene vinyl alcohol copolymer
fumigation
methyl bromide
Plastic film
polyethylene based film
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Related Content
More details
DOI :
10.1002/(SICI)1096-9063(199806)53:2<141::AID-PS757>3.0.CO;2-9
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21189
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:42
Scientific Publication
Permeability of plastic films to methyl bromide: A comparative laboratory study
53
Gamliel, A., Lab. for Pest Management Application, ARO The Volcani Center, Bet Dagan 50250, Israel
Grinstein, A., Lab. for Pest Management Application, ARO The Volcani Center, Bet Dagan 50250, Israel
Beniches, M., Lab. for Pest Management Application, ARO The Volcani Center, Bet Dagan 50250, Israel
Katan, J., Lab. for Pest Management Application, ARO The Volcani Center, Bet Dagan 50250, Israel
Fritsch, J., Lab. for Pest Management Application, ARO The Volcani Center, Bet Dagan 50250, Israel
Ducom, P., Lab. for Pest Management Application, ARO The Volcani Center, Bet Dagan 50250, Israel
Permeability of plastic films to methyl bromide: A comparative laboratory study
The permeability of plastic films to the fumigant methyl bromide (MB) was measured by two different methods, in order to facilitate the selection of films which are impermeable to the gas. Polyethylene-based films are highly permeable to MB, as evidenced by both methods. In contrast, multilayer coextruded films which have a layer of barrier material such as polyamide (PA) or ethylene-vinyl alcohol copolymer (EVOH) were significantly less permeable to MB, as reflected by the parameters permeability rate, time to 90% concentration (TC90, by the diffusion method) and lag-time values (by the variable-volume method). A significant correlation was found between the permeability rate assessed by the diffusion method and that obtained with the variable-volume method. Permeability of all films increased with temperature as evidenced by all tested parameters. This increase was more pronounced with polyethylene films, the permeabilities of which increased five-to six-fold when the temperature was increased from 20°C to 60°C. The effect of temperature on barrier-film permeability was less significant. Permeability of films to MB was affected by additional factors such as additives, the length of the monomer side-chain, and the thickness and density of polyethylene films.
Scientific Publication
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