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Eldho KM, Rajamohanan PR, Anto R, Bulakh N, Lele AK, Ajithkumar TG. Insights into the Molecular Dynamics in Polysulfone Polymers from 13C Solid-State NMR Experiments. J Phys Chem B 2015; 119:11287-94. [DOI: 10.1021/acs.jpcb.5b03103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kavalakal Mathai Eldho
- Central NMR Facility and ‡Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune 411 008, India
| | - P. R. Rajamohanan
- Central NMR Facility and ‡Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune 411 008, India
| | - Ralf Anto
- Central NMR Facility and ‡Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune 411 008, India
| | - Neelima Bulakh
- Central NMR Facility and ‡Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune 411 008, India
| | - Ashish K. Lele
- Central NMR Facility and ‡Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune 411 008, India
| | - T. G. Ajithkumar
- Central NMR Facility and ‡Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Pune 411 008, India
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Quintana I, Arbe A, Colmenero J, Frick B. Dynamics of Polyethersulfone Phenylene Rings: A Quasielastic Neutron Scattering Study. Macromolecules 2005. [DOI: 10.1021/ma047535n] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- I. Quintana
- Departamento de Física de Materiales UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain, Unidad Física de Materiales (CSIC−UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain, Donostia International Physics Center, Apartado 1072, 20080 San Sebastián, Spain, and Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - A. Arbe
- Departamento de Física de Materiales UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain, Unidad Física de Materiales (CSIC−UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain, Donostia International Physics Center, Apartado 1072, 20080 San Sebastián, Spain, and Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - J. Colmenero
- Departamento de Física de Materiales UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain, Unidad Física de Materiales (CSIC−UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain, Donostia International Physics Center, Apartado 1072, 20080 San Sebastián, Spain, and Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France
| | - B. Frick
- Departamento de Física de Materiales UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain, Unidad Física de Materiales (CSIC−UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain, Donostia International Physics Center, Apartado 1072, 20080 San Sebastián, Spain, and Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France
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Arrese-Igor S, Arbe A, Alegría A, Colmenero J, Frick B. Phenylene ring dynamics in bisphenol-A-polysulfone by neutron scattering. J Chem Phys 2004; 120:423-36. [PMID: 15267305 DOI: 10.1063/1.1630013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have investigated the dynamics of phenylene rings in a glassy polysulfone (bisphenol-A-polysulfone) by means of quasielastic neutron scattering. Nowadays it is well known that these molecular motions are directly connected with the mechanical properties of engineering thermoplastics in general. The particular system investigated by us has the advantage that by selective deuteration of the methyl groups, the neutron scattering measured is dominated by the incoherent contribution from the protons in the phenylene rings. In this way, the dynamics of such molecular groups can be experimentally isolated. Two different types of neutron spectrometers: time of flight and backscattering, were used in order to cover a wide dynamic range, which extends from microscopic (10(-13) s) to mesoscopic (10(-9) s) times. Moreover, neutron diffraction experiments with polarization analysis were also carried out in order to characterize the structural features of the sample investigated. Fast oscillations of increasing amplitude with temperature and pi-flips are identified for phenylene rings motions. Due to the structural disorder characteristic of the amorphous state, both molecular motions display a broad distribution of relaxation times, which spreads over several orders of magnitude. Based on the results obtained, we propose a model for phenylene rings dynamics, which combines the two kinds of molecular motions identified. This model nicely describes the neutron scattering results in the whole dynamic range investigated.
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Affiliation(s)
- S Arrese-Igor
- Departamento de Física de Materiales UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain
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