Calculation of molecular weight distributions in free-radical polymerization with chain branching
✍ Scribed by Alessandro Butté; Alessandro Ghielmi; Giuseppe Storti; Massimo Morbidelli
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 198 KB
- Volume
- 8
- Category
- Article
- ISSN
- 1022-1344
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
The attainable ®alues of molecular-weight distribution MWD specified by the degree of polymerization and the polydispersity in a batch free-radical polymerization reactor are described. The two-step method based on the quadratic profile of the instantaneous degree of polymerization is used to obtain
## Abstract A method is described which allows the precise estimation of molecular weight distribution parameters __p__ and __A__ which pertain to free‐radical polymerizations. Thus, expressions are developed which allow the estimation of (1 − __p__) by means of a programmable calculator using mole
Free-radical polymerization of styrene was carried out in the presence of chain transfer agents (CTAs) with functionality, f ϭ 1-4. The size exclusion chromatography (SEC) with an ultraviolet absorption detector (UV) was used to measure the molecular weight distribution (MWD). A Monte Carlo simulati
When highly reactive chain transfer agents with low water solubilities (e.g., long chain thiols) are used in emulsion polymerizations, transport of the chain transfer agent (CTA) from the monomer droplets to the polymer particles can become diffusion limited. Consequently, the concentration of CTA i