𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Organosilicon-Assisted Transformation of Living Anionic into Living Cationic Polymerization

✍ Scribed by Takanobu Sanji; Daisuke Sunaga; Yasuhiro Muto; Hideki Sakurai

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
83 KB
Volume
24
Category
Article
ISSN
1022-1336

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A novel method is described for transforming an anionic polymerization process into a cationic polymerization process assisted by organosilyl groups. The reaction of the p‐tolyldimethylsilyl end group of polystyrene and trifluoromethanesulfonic acid produced a silyl triflate end group that served as a macroinitiator for the living cationic polymerization of isobutyl vinyl ether. The SiO linkage in the block copolymers underwent specific cleavage by reaction with tetrabutylammonium fluoride.

magnified image

📜 SIMILAR VOLUMES

Electron Transfer Reactions of Radical A
Electron Transfer Reactions of Radical Anions with TEMPO: A Versatile Route for Transformation of Living Anionic Polymerization into Stable Radical-Mediated Polymerization
✍ Ioan Cianga; Takamichi Senyo; Koichi Ito; Yusuf Yagci 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 146 KB

## Abstract **Summary:** The possibility of transforming a living anionic polymerization into a stable radical‐mediated radical polymerization (SFRP) was demonstrated. For this purpose, 2,2,6,6‐tetramethylpiperidine‐__N__‐oxyl (TEMPO) alcoholate, formed by a one‐electron redox reaction between pota

Synthesis of novel glycopeptide-polyoxaz
Synthesis of novel glycopeptide-polyoxazoline block copolymers by direct coupling between living anionic and cationic polymerization systems
✍ Kaname Tsutsumiuchi; Keigo Aoi; Masahiko Okada 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 320 KB

## Abstract A novel glycopeptide‐containing block copolymer, poly[__O__‐(tetra‐__O__‐acetyl‐β‐D‐glucopyranosyl)‐L‐serine]‐__block__‐poly(2‐methyl‐2‐oxazoline) (5), was synthesized by mutual termination of living polymerizations of a sugar‐substituted α‐amino acid __N__‐carboxyanhydride (NCA) (1) an

Block copolymers by transformation of “l
Block copolymers by transformation of “living” carbocationic into “living” radical polymerization. II. ABA-type block copolymers comprising rubbery polyisobutene middle segment
✍ Simion Coca; Krzysztof Matyjaszewski 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 206 KB 👁 2 views

A general method for the transformation of ''living'' carbocationic into ''living'' radical polymerization, without any modification of chain ends, is reported for the preparation of ABA block copolymers. For example, a,v-difunctional polyisobutene, capped with several units of styrene, Cl-St-PIB-St