ISSN:
0887-624X
Keywords:
1,3-cyclohexadiene
;
α-fluoroacrylonitrile
;
fluoropolymers
;
alternating copolymers
;
two dimensional NMR
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Poly(1,3-cyclohexadiene-alt-α-fluoroacrylonitrile) [poly(1,3-CHD/α-FAN)], an alternating copolymer of α-fluoroacrylonitrile and 1,3-cyclohexadiene has been prepared in bulk using varied monomer feed ratios and AIBN as initiator at 65°C. Elemental and 1H-NMR analyses indicate that the copolymer contains an equimolar composition of α-FAN and 1,3-CHD as observed for alternating copolymers with donor-acceptor polymerizations. A 2-D 1H-COSY NMR experiment indicates that the copolymer contains 1,4-linkages across the cyclohexene unit while more reliable 13C-NMR spectra suggests the copolymer to contain both 1,2- and 1,4-linkages. Poly(1,3-CHD/α-FAN) exhibits improved thermal stability relative to the alternating copolymer of 1,3-CHD and α-chloroacrylonitrile due to a higher resistance to HF elimination relative to HCl elimination.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pola.1992.080300602
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