𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Reaction rate of crosslinkings by using a metallated polymer. III. Solvent effects on rate constants of grafting and intramolecular crosslinking reactions.

✍ Scribed by Ishizu, Koji ;Ohtaka, Atsushi ;Fukutomi, Takashi ;Kakurai, Toshio

Publisher
John Wiley and Sons
Year
1982
Weight
340 KB
Volume
20
Category
Article
ISSN
0360-6376

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Lithium‐metallated (styrene‐p‐benzylstyrene)copolymer was reacted with chlorine‐terminated polystyrene as a crosslinker polymer in a mixture of tetrahydrofuran (THF)–n‐hexane at 25°C in the presence of lithium chloride(LiCl). The rate constants were estimated from the changes in the concentration of metallated polymer by photometrical measurements. As a result, the rate constant of grafting (k~1~) showed a constant value in spite of a change in molecular weight of the crosslinker polymers and the addition of n‐hexane. The rate constant of intramolecular crosslinkings (k~2intra~) obtained in a mixed solvent (21 ∼ 36 vol % of n‐hexane) increased when the molecular weight of the crosslinker polymers and the extent of n‐hexane were increased.

📜 SIMILAR VOLUMES

Reaction rate of crosslinkings by using
Reaction rate of crosslinkings by using metallated polymer. I. Grafting and intramolecular crosslinkings at the first stage
✍ Ishizu, Koji ;Ino, Kazuhide ;Koshiro, Yoshitaka ;Fukutomi, Takashi ;Kakurai, Tos 📂 Article 📅 1982 🏛 John Wiley and Sons ⚖ 398 KB

## Abstract Lithium‐metallated styrene–__p__‐benzylstyrene copolymer was reacted with chlorine‐terminated polystyrene as a crosslinker polymer in tetrahydrofuran (THF) at 25°C. The rate constant was estimated from the changes in the concentration of metallated polymer by using photometrical measure

Reaction rate of crosslinkings by using
Reaction rate of crosslinkings by using a metallated polymer. II. Intermolecular and intramolecular crosslinkings at the second state
✍ Ishizu, Koji ;Ino, Kazuhide ;Fukutomi, Takashi ;Kakurai, Toshio 📂 Article 📅 1982 🏛 John Wiley and Sons ⚖ 441 KB

## Abstract Lithium‐metallated styrene–__p__‐benzylstyrene copolymer was reacted with the branched polymer with chlorine groups at the pendant chain ends (multifunctional branched polymer) in tetrahydrofuran (THF) at 25°C. The rate constant was estimated from the changes in the concentration of met