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Citation: J. M. DEITZEL, Bojie WANG, Ping HUANG, L. Lawrence CHAPOY, Stephen Z. D. CHENG. Phase Transitions and Structures of Poly (ethylene-co-chlorotrifluoroethylene)[J]. Chinese Journal of Applied Chemistry, ;2001, 18(5): 301-309. shu

Phase Transitions and Structures of Poly (ethylene-co-chlorotrifluoroethylene)

1.
The Maurice Morton Institute and Department of Polymer Science, The University of Akron, Akron Ohio 44325-3909, U.S.A.

Received Date: 6 March 2001
Available Online: 2 April 2001

Poly (ethylene-co-chlorotrifluoroethylene) with a 1:1 molar ratio of ethylene and chlorotrifluoroethylene in composition, PECTFE, is a statistically alternating copolymer widely used in cable coating industry. PECTFE has been commonly characterized as a semicrystalline polymer with crystals melting at 238℃. Differential scanning calorimetry, thermal mechanical analysis and dynamic mechanical analysis indicated that PECTFE undergoes a reversible solid-solid transition during cooling and heating in the temperature range between 100℃ and 200℃. Based on detailed structural analysis via wide angle X-ray diffraction and electron diffraction techniques, we proposed that PECTFE possesses a hexagonal phase above 200℃(a=0.60 nm, c=0.49 nm) and an orthorhombic phase (a=0.99 nm, b=0.57 nm, c=0.49 nm) at room temperature.
- poly(ethylene-co-chlorotrifluoroethylene),
- phase transition,
- structure
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