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Reaction rate of crosslinkings by using metallated polymer. I. Grafting and intramolecular crosslinkings at the first stage

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

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

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✦ Synopsis

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 measurements. The various reaction conditions were chosen and it became clear that the rate constants of grafting (k~1~) and intramolecular crosslinkings (k~2intra~) were gotten separately at the first stage. As a result, k~2intra~ showed larger values than k~1~ and decreased with increasing degree of polymerization of crosslinker polymers.

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Reaction rate of crosslinkings by using
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✍ 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

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## 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