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Influence of pressure on cyclization of a polystyrene chain

✍ Scribed by A.T. Reis e Sousa; J.M.G. Martinho; F. Baros; J.C. André; M.A. Winnik

Book ID
107797856
Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
286 KB
Volume
48-49
Category
Article
ISSN
0022-2313

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📜 SIMILAR VOLUMES

Influence of pressure on cyclization of
Influence of pressure on cyclization of a polystyrene chain. Time-resolved fluorescence measurements
✍ A.T. Reis e Sousa; E.M.S. Castanheira; J.M.G. Martinho; S. Saghbini; F. Baros; J 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 368 KB

The cyclization of a polystyrene chain (M,,=4500, .&4,/M.= 1.08), both ends labelled with I -pyrenyl groups, was studied in toluene and methylcyclohexane from 1 to 3500 bar. The major effect of pressure on the cyclization rate constant comes from its effect upon the viscosity. Nevertheless, for a fu

Cyclization dynamics of polymers, 26. En
Cyclization dynamics of polymers, 26. End-to-end cyclization of polystyrene in mixed solvents. Effect of chain length
✍ Martinho, José M. G. ;Martinho, Maria Helena ;Winnik, Mitchell A. ;Beinert, Géra 📂 Article 📅 1989 🏛 Wiley (John Wiley & Sons) ⚖ 520 KB

Cyclization rate measurements were carried out on polystyrene chains of different molecular weights and labelled at both ends with I-pyrenyl groups, using as solvents cyclopentane (a thetasolvent), acetone (a poor solvent), and their mixtures. These mixtures exhibit a cosolvency effect for polystyre