Studies on the thermal properties of phosphorus-containing polyethyleneterephthalate
β Scribed by Ch. Bechev; K. Troev; At. Grozeva; K. Dimov; G. Borisov
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 278 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0014-3057
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Phosphorus containing polyimides were prepared via phosphorylation of organosoluble polyimides. This was achieved by phenoxaphosphine oxide ring formation reaction or esterification with diethylchlorophosphate. The phosphorylation was confirmed by infrared, 31 P nuclear magnetic resonance, and eleme
There is an investigation of the influences of the type and concentration of modifier (bis(2hydroxyethyl)phosphite or the sodium salt of diethylphosphite) on the transesterification processes during polyethyleneterephthalate formation, as well as on the properties of the pre-condensation mixture. Th