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- Title
New soluble cyano-containing poly(arylene ether) copolymers bearing pendant xanthene groups.
- Authors
Shou-Ri Sheng; Yi-Hua Wang; Shui-Ping Huang; Wei Cao; Cai-Sheng Song
- Abstract
Homopolymers and copolymers of poly(arylene ether nitrile) (PAEN)-bearing pendant xanthene groups were prepared by the nucleophilic substitution reaction of 2,6-difluorobenzonitrile with 9,9-bis(4-hydroxyphenyl)xanthene (BHPX) and with various molar proportions of BHPX to hydroquinone (100/0 to 40/60) with N-methyl-2-pyrrolidone (NMP) as a solvent in the presence of anhydrous potassium carbonate. These polymers had inherent viscosities between 0.61 and 1.08 dL/g, and their weight-average molecular weights and number-average molecular weights were in the ranges 34,200-40,800 and 17,800-20,200, respectively. All of the PAENs were amorphous and were soluble in dipolar aprotic solvents, including NMP, N,N-dimethylformamide, and N,N-dimethylacetamide and even in tetrahydrofuran and chloroform at room temperature. The resulting polymers showed glass-transition temperatures ( T's) between 220 and 257°C, and the T values of the copolymers were found to increase with increasing BHPX unit content in the polymer. Thermogravimetric studies showed that all of the polymers were stable up to 422°C with 10% weight loss temperatures ranging from 467 to 483°C and char yields of 54-64% at 700°C in nitrogen. All of the new PAENs could be cast into transparent, strong, and flexible films with tensile strengths of 106-123 MPa, elongations at break of 13-17%, and tensile moduli of 3.2-3.7 GPa. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
- Subjects
POLYETHERS; ETHERS; COPOLYMERS; XANTHENE; POLYMERS
- Publication
Journal of Applied Polymer Science, 2011, Vol 121, Issue 5, p2788
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.33764