𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Copolymerization kinetics of 4-methoxystyrene with methyl methacrylate and 4-methoxystyrene with styrene: A test of the penultimate model

✍ Scribed by Mark C. Piton; Mitchell A. Winnik; Thomas P. Davis; Kenneth F. O'driscoll

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
437 KB
Volume
28
Category
Article
ISSN
0887-624X

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The propagation kinetics for the copolymerization of 4‐methoxystyrene with methyl methacrylate and 4‐methoxystyrene with styrene have been investigated using a pulsed laser technique. The dependence of the copolymerization propagation rate constant on the monomer feed ratio shows a diviation from classic Mayo–Lewis model kinetics for 4‐methoxystyrene with methyl methacrylate but not for 4‐methoxystyrene with styrene. These results have been interpreted to indicate that a penultimate effect is apparent in the first monomer pair but not in the second. With r~1~r~2~ = 0.092 for the copolymerization of 4‐methoxystyrene with methyl methacrylate and r~1~r~2~ = 0.95 for 4‐methoxystyrene with styrene, it is suggested that a deviation of the product of the coplymerization reactivity ratios from unity may be an indication of the presence of a penultimate effect.

📜 SIMILAR VOLUMES

Penultimate model description of the pro
Penultimate model description of the propagation kinetics for the free radical copolymerization of styrene and methyl methacrylate
✍ Schweer, Johannes 📂 Article 📅 1993 🏛 Wiley (John Wiley & Sons) ⚖ 827 KB

## Abstract Recently experimental data on the free radical copolymerization of styrene and methyl methacrylate in bulk were shown to obey penultimate model kinetics. These data were now reevaluated with respect to copolymerization parameters by means of a simultaneous fit of the penultimate model b

Free radical polymerisation studies of 4
Free radical polymerisation studies of 4-substituted styrenes, 1. The reactions of 2-cyano-2-propyl radicals with styrene, 4-methoxystyrene and 4-methylstyrene
✍ Robert William Huxley Berry; Andrew John Ludlow; Robert John Mazza 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 671 KB

## Abstract Only a limited amount of work has been previously published concerning the free radical polymerisation of 4‐methoxystyrene and 4‐methylstyrene initiated by 2,2′‐azoisobutyronitrile (2,2′‐azobis(2‐methylpropiononitrile)) (AIBN). The present investigation was, therefore, undertaken to est