Polyimide-Polysiloxane Block Copolymers Synthesized from α, ω-(3-Aminophenoxy) Terminated Poly[Oxy(dimethylsilyl)-1,4- phenylene(dimethylsilylene)]s
✍ Scribed by Sysel, Petr; Oupický, David
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 398 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0959-8103
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✦ Synopsis
A method has been worked out for the synthesis of u,o-(3-aminophenoxy) terminated poly[oxy(dimethylsilyl)-1,4-phenylene(dimethylsilylene)] oligomers with controlled molecular weight. From these oligomers were synthesized polyimide-polysiloxane block copolymers via a transimidization route, with polyimide moieties based on 2-aminopyridine terminated 5,5'-oxybis-1,3isobenzofuranedione -44-[ l,4-phenylenebis(1-methylethylidene)] bisaniline oligomers. The copolymers obtained show higher thermooxidative stability in com- parison with copolymers having siloxane moiety based on upaminopropyl or u,w-arylamine terminated poly(dimethylsi1oxane) oligomers.