Synthesis and gas permeation properties of poly(dialkylacetylenes) containing isopropyl-terminated side-chains
โ Scribed by Ingo Pinnau; Zhenjie He; Atsushi Morisato
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 143 KB
- Volume
- 241
- Category
- Article
- ISSN
- 0376-7388
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๐ SIMILAR VOLUMES
## Abstract A series of new polyimides containing fluorinated alkoxy side chains are prepared from novel fluorinated alkoxy diamines. The dieletric constant at 1 kHz in the fluorinated polyimides decreases from 3.3 to 2.6 as fluorine content increases. The refractive index also changes from 1.58 to
Diarylacetylene monomers having trimethylsilyl groups and other substituents (substituted biphenyl, 1a and 1b; trimethylsilylmethylphenyl, 1cee) were synthesized and polymerized with TaCl 5 -n-Bu 4 Sn catalyst to produce the corresponding poly(diarylacetylene)s (2aed). Polymers 2aec had high molecul
Dalian institute of Chemical Physics, Chinese Academy of Sciences, P. 0. Box 110, Dalian 11 6023, People's Republic of China ## SYNOPSIS Palladiumsupported on a high-temperature-withstanding polymer, phenophthalein poly(ether sulfone) (PES-C), exhibits very high catalytic activity both in the car