title: Systematic studies of morphological changes of precision polyethylene.
abstract: 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.
authors: The George and Josephine Butler Polymer Research Laboratory, Department of Chemistry, University of Florida, Gainesville, Florida, 32611-7200, USA.
authors: Chip S
authors: CS
authors: Few
authors: The George and Josephine Butler Polymer Research Laboratory, Department of Chemistry, University of Florida, Gainesville, Florida, 32611-7200, USA.
authors: Kenneth B
authors: KB
authors: Wagener
authors: The George and Josephine Butler Polymer Research Laboratory, Department of Chemistry, University of Florida, Gainesville, Florida, 32611-7200, USA.
authors: Donovan L
authors: DL
authors: Thompson
mesh_terms: D002152:Calorimetry, Differential Scanning; D003460:Crystallization; D053758:Nanoparticles; D020959:Polyethylene / Q000737:chemistry*; D012542:Scattering, Radiation; D013055:Spectrophotometry, Infrared
chemical_list: D020959:Polyethylene
keywords: ADMET; olefin metathesis; polyethylene; polymer morphology; well-defined microstructure