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Ethylene and 1‐hexene sorption in LLDPE under typical gas‐phase reactor conditions: Experiments
Author(s) -
Novak Antonin,
Bobak Marek,
Kosek Juraj,
Banaszak Brian J.,
Lo Dennis,
Widya Tomy,
Harmon Ray W.,
de Pablo Juan J.
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23508
Subject(s) - sorption , crystallinity , 1 hexene , ethylene , hexene , polyethylene , swelling , materials science , gravimetric analysis , linear low density polyethylene , polymer , polymer chemistry , solubility , chemical engineering , copolymer , chemistry , organic chemistry , composite material , adsorption , catalysis , engineering
The sorption of ethylene and 1‐hexene and their mixture in three poly(ethylene‐ co ‐1‐hexene) samples is measured gravimetrically at temperatures 70, 90, and 150°C and pressures 0–30 bar. Gravimetric sorption measurements are supplemented with microscopic observations of swelling of polyethylene particles caused by sorption and the extent of swelling is found to be significant. Experimental data are compared with predictions of PC‐SAFT (perturbed chain—‐statistical associating fluid theory) equation of state. Comparison of sorption data in semicrystalline polymer (measured at 70 and 90°C) and amorphous polymer (at 150°C) demonstrates the constraining effect of semicrystalline structure. Solubilities of penetrants in investigated samples are not observed to depend on the content of 1‐hexene in copolymers. The solubility of the mixture of ethylene and 1‐hexene is smaller than the sum of solubilities of individual components at 70 and 90°C. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 1124–1136, 2006