Control of molecular-weight distribution in step-growth polymerization: the intermediate monomer feed method
β Scribed by Hidetaka Tobita; Yasuhisa Ohtani
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 817 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0032-3861
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π SIMILAR VOLUMES
## Synopsis The differential equations governing the molecular weight distribution (MWD) in step-growth polymerization are coupled and nonlinear and a large number of them must be solved simultaneously to keep the truncation error low. In this work, these equations have been decoupled so that they
Mole balance for the molecular weight distribution in homogeneous continuos-flow stirred tank reactors (HCSTRs) for reversible step-growth polymerization has been written. The relation for the moment generating function G is found to be a nonlinear ordinary differential equation and has been solved
## Abstract **Summary:** It is well known that the weightβaverage molecular weight ($\overline M \_{\rm w}$) is strictly dependent on conversion in stepβgrowth polymerizations performed in batch and that the $\overline M \_{\rm w}$ is very sensitive to impurities and molar imbalance. This makes the