ISSN:
1433-075X
Keywords:
Key words Gas permeability
;
CO2
;
Plasticizer
;
Polystyrene film
;
Uniaxial orientation
;
WAXD
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Gas permeability coefficients, Ps, of CO2, O2, and N2 have been measured in four kinds of polystyrene (PS) films: an unconditioned film with no orientation (1), a high pressure CO2-conditioned film with no orientation (2), an uniaxially hot-drawn film with some orientation (3), and a film uniaxially drawn under CO2 plasticizing with some orientation (4). Wide angle X-ray diffraction (WAXD) scans for each sample have also been made. High-pressure CO2-conditioning effect was confirmed from the result that P values for any permeation gas in sample 2 were larger than those in sample 1. Values of P for any gas in sample 3 were almost close to those in sample 1 and decreased slightly with Hermans orientation function, f. Gas permeability coefficients in sample 4 are larger than those in sample 3 over the whole range of f studied in this work and increased with f. These results were discussed from a viewpoint of inter-segmental distances for PS films.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100190050018
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