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Systematic Studies of Morphological Changes of Precision Polyethylene
Author(s) -
Few Chip S.,
Wagener Kenneth B.,
Thompson Donovan L.
Publication year - 2014
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201300672
Subject(s) - differential scanning calorimetry , small angle x ray scattering , polyethylene , materials science , crystallization , polymer chemistry , monomer , polymerization , polymer , acyclic diene metathesis , scattering , crystallography , metathesis , composite material , optics , chemistry , organic chemistry , thermodynamics , physics
The morphological changes of polyethylenes bearing precisely spaced “defects” are reviewed, focusing on the effects of defect frequency, size, and functionality on crystallization and crystalline structure. The precise defect interval is imparted through acyclic diene metathesis polymerization of structurally symmetric diene monomers. Studies have included structural characterization by differential scanning calorimetry, wide‐angle X‐ray scattering, small‐angle X‐ray scattering (SAXS), and infrared spectroscopy. The collective results are presented separately for functionalized polyethylenes and for those containing alkyl chain branches, as these two classes of polymers vary greatly in morphology.