In amorphous polymers (PMMA and PS) the low-frequency mode in Raman spectra is found to be dependent on frequency according to a power law. The exponent depends on the thermal history of the sample. The results obtained are explained in terms of a fracton description of localized vibrations. The spe
Coagulation kinetics in polymer colloids determined by light scattering
โ Scribed by Robert M Fitch; Richmond C Watson
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 441 KB
- Volume
- 68
- Category
- Article
- ISSN
- 0021-9797
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
From the intensities of light scattered from dilute and concentrated solutions of a given polymer, the chemical potential of the polymer and the solvent can be determined. Experiments have been carried out with solutions of monodisperse polystyrenes of different molecular weights in a poor solvent
We use diffusing-wave spectroscopy to monitor the evolution of a colloidal gel. Changes in particle diffusion are resolved without perturbing the system and are used to distinguish between unstable and stable emulsions during the early stages of their development. Our observations suggest that multi