Premium
Microstructural characterization of propylene–butene‐1 copolymer using temperature rising elution fractionation
Author(s) -
Abiru Toshinobu,
Mizuno Akira,
Weigand Frank
Publication year - 1998
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/(sici)1097-4628(19980531)68:9<1493::aid-app12>3.0.co;2-0
Subject(s) - fractionation , 1 butene , gel permeation chromatography , crystallinity , differential scanning calorimetry , copolymer , elution , materials science , butene , solubility , polymer , polymer chemistry , analytical chemistry (journal) , chemical engineering , chromatography , chemistry , catalysis , organic chemistry , ethylene , composite material , engineering , physics , thermodynamics
Propylene–butene‐1 copolymer (PBC) prepared with a titanium catalyst system was fractionated by temperature rising elution fractionation (TREF) over a temperature range of 5–80°C. PBC was shown to have a wide composition distribution ranging between 12–47 mol % of butene‐1. Most of the fractions showed nearly the same crystallinity regardless of the butene‐1 content. However, the solubility of the crystalline parts, which turned out to be the driving force for the fractionation, varied over the butene‐1 content. Evidence that PBC shows isomorphism was obtained by the analysis of fractionated polymers, using 13 C nuclear magnetic resonance spectrometry, X‐ray diffraction, differential scanning calorimetry, and gel permeation chromatography. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 68: 1493–1501, 1998