Molecular dynamics of cyclic and linear poly(dimethylsiloxanes)
β Scribed by K. U. Kirst; F. Kremer; T. Pakula; J. Hollingshurst
- Publisher
- Springer
- Year
- 1994
- Weight
- 809 KB
- Volume
- 272
- Category
- Article
- ISSN
- 0340-255X
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π SIMILAR VOLUMES
Dielectric constant measurements were carried out on poly(dimethylsiloxane) (PDMS) linear chains CH3-[Si(CH3)20]x-Si(CH3) 3 and cyclics t"[Si(CH3)20~ for x -~ 10, 15 and 70, in cyclohexane and in benzene at 30Β°C. Mean-square dipole moments </~ 2> were calculated from these data, using the method of
## Abstract The Kirkwood equation and a MonteβCarlo technique which employs Metropolis sampling have been used to calculate diffusion coefficients (__D__) for low molar mass cyclic poly(dimethylsiloxanes). Correlations between calculated and experimental values of __D__ show that the effective segm