New aromatic poly-1,2,4-triazoles and poly-1,3,4-oxadiazoles are studied as thermally stable membrane materials. Various groups were introduced onto the pendant phenyl groups of poly-1,2,4-triazoles. Glass transition temperature, degradation temperature, and cold crystallization behavior were studied as a function of these groups. Cold crystallization appeared to be highly sensitive to macromolecular regularity. The solubility of poly-1,3,4-oxadiazoles was highly improved upon incorporation of 5-t-butylisophthalic, 1,1,3-trimethyl-3-phenylindane, 4,4-(2,2-diphenyl) hexafluoro propane, and diphenyl ether groups into the polymeric main chain, whereas the high glass transition temperatures and degradation temperatures typical for aromatic poly-1,3,4-oxadiazoles were maintained.
|Number of pages||11|
|Journal||Journal of polymer science. Part A: Polymer chemistry|
|Publication status||Published - 1994|
- cold crystallization
Hensema, E. R., Hensema, E. R., Sena, M. E. R., Mulder, M. H. V., Smolders, C. A., & Smolders, C. A. (1994). Synthesis and properties of related polyoxadiazoles and polytriazoles. Journal of polymer science. Part A: Polymer chemistry, 1994(32), 527-537. https://doi.org/10.1002/pola.1994.080320314