✦ LIBER ✦
Bimodality in molar-mass distribution in polystyrenes initiated by perchloric acid — an artifact? — not diagnostic of propagating species?
✍ Scribed by David Charles Pepper
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 205 KB
- Volume
- 17
- Category
- Article
- ISSN
- 1022-1336
No coin nor oath required. For personal study only.
✦ Synopsis
Recently rediscovered evidence supports the conclusion that the bimodality of molarmass distributions in polystyrenes initiated by HCIO, is not, as widely believed, the consequence of independent chain-growth by different propagating species, but originates from lack of uniformity in reagent concentrations during the earliest stage of the polymerization, where the time-scale of the growth and decay of the transient ionic population is short compared with that of mixing, in conventional preparative experiments.