Macromolecular Materials and Engineering · 2010 · 54 citations · 40 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials ChemistryPolymer ChemistryPolymer MaterialsMolecular Weight DistributionPolymer AnalysisPolymer CharacterizationPolymer MorphologyPolymer Physical ChemistryPolymer PhysicsBimodal DistributionBimodal Molecular Weight DistributionsCompositional HeterogeneityCopolymer Molecular Weight DistributionHeterogeneityMolecular Weight Distribution AnalysisPolymer FractionationPolymer Molecular Weight Distribution
Abstract TREF fractionation was combined with SEC‐FTIR analysis to measure the compositional heterogeneity within a commercial impact PP copolymer. The chemical composition of all fractions was determined as function of their molecular weight distribution. This approach proved to be highly successful at identifying different constituents within fractions exhibiting bimodal molecular weight distributions. Furthermore, the determination of ethylene and propylene crystallinity distribution across the molecular weight distribution confirmed the morphological nature of each of the components of the bimodal distribution. It is demonstrated that the combination of TREF and SEC‐FTIR provides a simple alternative to more time‐consuming conventional ways of characterising impact PP copolymers of complex heterogeneity. magnified image
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Infrared study of polypropylene
J. P. Luongo · Journal of Applied Polymer Science · 1960 · 275 citations