Thermal and mechanical properties of radiation crosslinked poly(tetrafluoroethylene-co-perfluoromethyl vinyl ether)
Creators
- 1. Polymer Materials and Radiation Group, University of Queensland, St. Lucia, QLD (Australia)
- 2. DuPont Dow Elastomers L.L.C., DuPont Experimental Station, Wilmington, DE (United States)
- 3. Japan Atomic Energy Research Institute, Takasaki Radiation Chemistry Research Establishment, Watanuki-cho, Takasaki-shi, Gunma (Japan)
- 4. Centre for Magnetic Resonance, University of Queensland, St. Lucia, QLD (Australia)
Description
The γ-radiolysis of poly(tetrafluoroethylene-co-perfluoromethyl vinyl ether) (TFE/PMVE) was investigated using chemical and mechanical analyses. The polymer was found to form an insoluble network with a dose of gelation of 15.8 kGy. Tensile and glass transition temperature measurements indicated the predominance of crosslinking, with optimal elastomeric properties reached in the dose range of 120 to 200 kGy. Photoacoustic FTIR spectroscopy (PAS) showed the formation of new carboxylic acid end groups on irradiation. These new end groups were shown to decrease the thermal oxidative stability of the crosslinked network as determined by thermal gravimetric analysis. Electron spin resonance (ESR) studies of the polymer at 77 K indicated the presence of radical precursors. A G-value of 1.1 was determined for radical production at 77 K. Comparison of radical concentrations for a copolymer with a different mole ratio of PMVE, indicated that the PMVE units contribute to scission reactions
Additional details
Identifiers
- PII
- S0969806X97002703;
Publishing Information
- Journal Title
- Radiation Physics and Chemistry (1993)
- Journal Volume
- 53
- Journal Issue
- 6
- Journal Page Range
- p. 657-667
- ISSN
- 0969-806X
- CODEN
- RPCHDM
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 34018754
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CHEMICAL ANALYSIS; CROSS-LINKING; ELASTICITY; ELECTRON SPIN RESONANCE; MECHANICAL PROPERTIES; MECHANICAL TESTS; ORGANIC FLUORINE COMPOUNDS; PHOTOACOUSTIC SPECTROSCOPY; THERMODYNAMIC PROPERTIES
- Descriptors DEC
- CHEMICAL REACTIONS; MAGNETIC RESONANCE; MATERIALS TESTING; MECHANICAL PROPERTIES; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; PHYSICAL PROPERTIES; POLYMERIZATION; RESONANCE; SPECTROSCOPY; TESTING
Optional Information
- Copyright
- Copyright (c) 1998 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.