✦ LIBER ✦

Lichtstreubefunde zur Kettenspaltung von Polystyrol in sauerstoffreien CCl4- und CHCl3-Lösungen bei Lichteinwirkung der Wellenlängen λ ≥ 270 nm

✍ Scribed by Woliński, Leszek ;Turzyński, Zbigniew ;Witkowski, Konrad

Publisher: Wiley (John Wiley & Sons)
Year: 1987
Weight: 547 KB
Volume: 188
Category: Article
ISSN: 0025-116X
DOI: 10.1002/macp.1987.021881212

No coin nor oath required. For personal study only.

✦ Synopsis

The photodegradation of polystyrene (PS) in deoxygenated solutions of CCb and CHCl, by irradiation with ultraviolet light of wavelengths 1 2 270 nm is investigated by quasielastic and integral light scatte_ring techniques. Molar mass distributions w (M), number-and weight-average molar masses % and M , as well as the average number of chain scissions per macromolecule x ( t ) as a function of the time of irradiation t were determined. The results obtained prove that efficient photodegradation occurs in CCb-and CHC1,-solutions of PS, although measurable changes in molar mass of irradiated PS starts to occur only after several hours of irradiation.

📜 SIMILAR VOLUMES

Über die quantenausbeute der kettenspalt

Über die quantenausbeute der kettenspaltung von polystyrol in lösung bei bestrahlung mit wellenlängen λ ≧ 270 nm

✍ Wolinski, Leszek ;Witkowski, Konrad 📂 Article 📅 1985 🏛 Wiley (John Wiley & Sons) ⚖ 194 KB

## Abstract Values of the mean number of chain scissions per macromolecule and the quantum efficiency of chain scission processes are presented for systems studied in our previous works, in which the photodegradation of polystyrene in solutions irradiated with mercury light (λ ≧ 270 nm) was investi