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Reaction rate of crosslinkings by using a metallated polymer. II. Intermolecular and intramolecular crosslinkings at the second state

✍ Scribed by Ishizu, Koji ;Ino, Kazuhide ;Fukutomi, Takashi ;Kakurai, Toshio

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

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✦ Synopsis

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 metallated polymer by using photometrical measurements. The various reaction conditions were chosen and it became clear that the rate constants of intermolecular (k~20~) and intramolecular (k~3intra~) crosslinkings were derived separately at the second stage. k~20~ showed a constant value in spite of the molecular weight of crosslinker chains and was about equal to the rate constant of the grafting. The rate of intramolecular crosslinking at the second stage increased with decreasing the molecular weight of pendant chains of multifunctional branched polymer.

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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
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✍ Ishizu, Koji ;Ohtaka, Atsushi ;Fukutomi, Takashi ;Kakurai, Toshio 📂 Article 📅 1982 🏛 John Wiley and Sons ⚖ 340 KB

## 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