Thermochemistry of the dissolving of poly-p-phenyleneterephthalamide in concentrated sulfuric acid
β Scribed by O. A. Bondarenko; B. A. Polyak; M. V. Shablygin; S. P. Papkov; N. P. Okromchedlidze
- Publisher
- Springer US
- Year
- 1987
- Tongue
- English
- Weight
- 152 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0015-0541
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Translational diffusion in 96% H2S04 and intrinsic viscosity of poly(naphthoy1eneimide benzimidazole) (PNIB) have been investigated in different stages of its degradation in solution in the temperature range from 65 to 120OC. The degradation rate constant k has been determined from the change in mol
## Abstract Optical and hydrodynamic properties of poly(biphenylsulfoneterephthalamide) (PPhSTPhA) (systematic IUPAC name: poly(iminoterephthaloyliminoβ2,2β²βsulfonylbiphenylβ4,4β²βdiyl)) in sulfuric acid were investigated by means of flow birefringence and viscometry. Analysis of experimental molecu