## Abstract A comprehensive mathematical model was established by considering the main and side reactions for solidβstate polycondensation of poly(ethylene terephthalate). The effect of temperature on chain mobility was used to estimate the rate constants of chemical reactions. The polymer crystall
A model for solid state diffusion
β Scribed by J. Hammerberg
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 253 KB
- Volume
- 100
- Category
- Article
- ISSN
- 0378-4371
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β¦ Synopsis
Classical self-diffusion is discussed in the context of a model single particle Hamiltonian containing a periodic potential and a stochastic time dependent potential. Solutions are given in the Gaussian white noise approximation in terms of a Fokker-Planck equation. The effects of spatial dependence in the time dependent potential are illustrated by calculations of the frequency dependent mobility in a simple one dimension example.
π SIMILAR VOLUMES
Shorter Communications kinetic constant of IInd order reactions, cm3/ V molessec V respectively, fraction of volume occupied by zz,z n stirred nucleus, occupied by recycle stream, not occupied by stagnant zones, dimension-z2.W zzs less mixer volume, cm3 feed rate, cm%ec by-pass fluid fraction, dimen