Viscometry of anisotropic solutions of poly-p-phenyleneterephthalamide in sulfuric acid
β Scribed by Donald G. Baird
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- English
- Weight
- 331 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0021-8995
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π SIMILAR VOLUMES
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 DLβpoly(lactic acid) of molecular weight about 2500 was prepared by polycondensation of lactic acid and characterized by viscosimetry, infrared spectroscopy, light scattering, GPC, and NMR. Tablets made of the above polymer were immersed in buffer solutions at 37Β°C, and their swelling b
Photon correlation spectroscopy in both polarized and depolarized geometry was employed to investigate the dynamics of a ribbon-type polymer exhibiting good solubility. In dilute solution, the translational diffusion for all examined molecular weights has confirmed the picture of wormlike chains wit