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Barrier properties of blends based on liquid crystalline polymers and polyethylene
KTH, Tidigare Institutioner                               , Polymerteknologi.
Vise andre og tillknytning
2000 (engelsk)Inngår i: Polymer Engineering and Science, ISSN 0032-3888, E-ISSN 1548-2634, Vol. 40, nr 9, s. 1969-1978Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Blends of an extrusion-grade polyethylene and two different liquid crystalline polymers of Vectra type were prepared by melt mixing using poly(ethylene-co-methacrylic acid) as compatibilizer. Oxygen and water vapor permeability, transparency and welding strength of compression molded and film blown specimens were studied. The compression molded blends showed gas permeabilities conforming to the Maxwell equation assuming low permeability liquid crystalline polymer spheres in a high permeability polyethylene matrix One of the liquid crystalline polymers with suitable rheological properties formed a more continuous phase in the film blown blends and a substantial decrease in oxygen and water vapor permeability was observed in these blends. The compression molded blends with 50% liquid crystalline polymer and some of blow molded blends showed very high gas permeabilities. It is believed that voids forming continuous paths through the structure were present in these samples. The blends showed significantly higher opacity than pure polyethylene.

sted, utgiver, år, opplag, sider
2000. Vol. 40, nr 9, s. 1969-1978
Emneord [en]
gas-transport properties, small-molecule penetrants, copolyesters, diffusion, systems, volume
Identifikatorer
URN: urn:nbn:se:kth:diva-20095ISI: 000089824500002OAI: oai:DiVA.org:kth-20095DiVA, id: diva2:338788
Merknad
QC 20100525Tilgjengelig fra: 2010-08-10 Laget: 2010-08-10 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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