title: Nondestructive Quantification of Local Plasticizer Concentration in PVC by (1)H NMR Relaxometry.
abstract: The properties of plasticized poly(vinyl chloride) (PVC) , one of the most important polymers today, are strongly dictated by the concentration of plasticizer. Yet, it has been impossible to quantify this concentration at different positions inside a PVC product without its destruction because of a lack of suitable analytical methods. Thus, this paper introduces a simple, fast, and efficient way to determine truly nondestructively the concentration of plasticizer in PVC by single-sided nuclear magnetic resonance (NMR). With the help of correlation curves between the concentration of plasticizer inside nonaged PVC samples and the corresponding volume-averaged NMR parameters, single-sided NMR allows the quantification of the local concentration of plasticizer in aged PVC plates at different depths by spatially resolved relaxation measurements. The presented approach represents a fundamental step toward in situ characterization of plasticized PVC.
authors.affiliation: Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Templergraben 55, D-52056, Aachen, Germany.
authors.forename: Alina
authors.initials: A
authors.lastname: Adams
authors.affiliation: Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Templergraben 55, D-52056, Aachen, Germany.
authors.forename: Rance
authors.initials: R
authors.lastname: Kwamen
authors.affiliation: Evonik Industries AG, Paul-Baumann-Straße 1, D-45772, Marl, Germany.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Woldt
authors.affiliation: Evonik Industries AG, Paul-Baumann-Straße 1, D-45772, Marl, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Graß
mesh_terms: D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D011143:Polyvinyl Chloride / Q000032:analysis* / Q000737:chemistry
chemical_list: D011143:Polyvinyl Chloride
keywords: NMR relaxometry; plasticized PVC; single-sided NMR; thermal aging