Polymerization of phenylacetylene with WOCl4/tetraphenyltin catalyst in benzene/1,4-dioxane. Synthesis of high-molecular-weight poly(phenylacetylene)
✍ Scribed by Jan Sedláček; Marta Pacovská; Jiří Vohlídal; Zlatka Grubišić-Gallot; Majda Žigon
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 362 KB
- Volume
- 196
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Phenylacetylene was polymerized with WOCl,/tetraphenyltin (mole ratio 1 : 2) catalyst in benzene and benzene/ 1 ,4-dioxane mixtures. The resulting polymers were characterized by means of multidetector size-exclusion chromatography and ' H NMR and IR spectroscopy. 1,4-Dioxane used as a co-solvent was found to increase both the content of cis units and the molecular weight of poly(pheny1acetylene) (PPhA); a weight-average molecular weight of a, = 1 . lo6 was reached. In spite of the high mole ratio monomer: catalyst (1 260: 1) used in the polymerizations high yields of PPhA were attained. No effect of an alteration in PPhA microstructure upon its degradation in tetrahydrofuran solution exposed to air has been observed.