Low-Density Polyethylene in Mixtures of Hexane and Benzene Derivates

0352959 - ÚCHP 2011 RIV SK eng J - Journal Article
Randová, A. - Bartovská, L. - Hovorka, Š. - Izák, Pavel - Poloncarzová, Magda - Bartovský, T.
Low-Density Polyethylene in Mixtures of Hexane and Benzene Derivates.
Chemical Papers. Roč. 64, č. 5 (2010), s. 652-656. ISSN 0366-6352
Institutional research plan: CEZ:AV0Z40720504
Keywords : membrane swelling * low-density polyethylene * aromatic hydrocarbon
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
Impact factor: 0.754, year: 2010

Preferential sorption, equilibrium swelling degree, and volume of the swollen membrane in systems low-density polyethylene + hexane + aromatic compound (benzene, methylbenzene, or ethylbenzene) were studied using gravimetric and dilatometric methods at the temperature of 25 A degrees C. Aromatic compounds are preferentially sorbed in low-density polyethylene compared to hexane. Experimental volume changes of the membrane were found to be noticeably different from those calculated on the basis of mass sorption data under the assumption of additivity. This difference points to the existence of the interactions between the polymer and the surrounding liquid mixture. The volume swelling degree curves are close to each other in the whole concentration range of the binary liquid mixture (hexane + aromatics) suggesting that the attractive forces between the polymer chains are the deciding factor limiting the volume expansion of the membrane in all three systems to the same extent.
Permanent Link: http://hdl.handle.net/11104/0006210