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Natural zeolite polypropylene composite film preparation and characterization
Author(s) -
Özmihçi F.,
Balköse D.,
Ülkü S.
Publication year - 2001
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.2147
Subject(s) - zeolite , polypropylene , materials science , chemical engineering , composite material , composite number , polymer chemistry , chemistry , catalysis , organic chemistry , engineering
Abstract In this research, the preparation and characterization of polypropylene (PP) and natural zeolite composites were studied. Natural zeolite mined in Gördes, Turkey was used as an alternative filler to CaCO 3 . Films were prepared by the extrusion of PP, and surface‐modified zeolite was made by polyethylene glycol 4000 with 2–4% zeolite. Zeolite‐filled composites had densities between 0.73 and 0.83 g/cm 3 and had void fractions of 0.07–0.20. Although the permeability of water vapor through 2% zeolite‐filled composites was very small, 4% zeolite‐filled films had very high permeabilities. The yield stresses of 2–4% zeolite‐containing films were around 26–27 N/mm 2 and were lower than that of PP, which indicated no adhesion between PP and zeolite. The effect of zeolite on the thermal degradation behavior in air and in a N 2 atmosphere was also studied. In air, zeolites did not cause the oxidation of PP. In a N 2 atmosphere, although the start of the thermal degradation of PP was retarded by zeolite, composites degraded at a faster rate than PP once the degradation started. At a processing temperature of 200°C, zeolites had no effect on the degradation of PP. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 2913–2921, 2001