Synthesis and Properties of Polyquinolines and Polyanthrazolines Containing Pyrrole Units in the Main Chain
β Scribed by Hou, Shifa; Ding, Mengxian; Gao, Lianxun
- Book ID
- 126434763
- Publisher
- American Chemical Society
- Year
- 2003
- Tongue
- English
- Weight
- 157 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0024-9297
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π SIMILAR VOLUMES
## Abstract Two new polyimides (ODAβPI and HDAβPI) having 1,4βphenylenediethynylene unit and octyloxy groups were synthesized. Judging from inherent viscosities of their precursor PAAs (1.42 and 1.62 dLβΒ·βg^β1^), the two PIs were very high in molecular weight. Casting and thermal imidization of PAA
## Abstract Summary: Copolymerizations of ethylene and disubstituted diallylsilanes (CH~2~ο£ΎCHο£ΏCH~2~ο£Ώ)~2~R~2~Si (Rβ=βCH~3~, C~6~H~5~) have been investigated with various zirconocene catalysts using methylaluminoxane as a cocatalyst. The bridged stereospecific catalysts showed a higher reactivity for