𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthesis and solution properties of alternating maleimide/styrene hyperbranched copolymers via controlled radical mechanism

✍ Scribed by Koji Ishizu; Chisato Takashimizu; Takeshi Shibuya; Satoshi Uchida

Book ID
104526734
Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
125 KB
Volume
52
Category
Article
ISSN
0959-8103

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Copolymerizations of (N,N‐diethyldithiocarbamyl)methylstyrene (inimer: DTCS) with maleimide (MI) were carried out under UV irradiation. DTCS monomers play an important role in this copolymerization system as an inimer that is capable of initiating radical polymerization of the vinyl group. Reactivity ratios (r~1~ = 0.15 and r~2~ = 0) were estimated by the curve‐fitting procedure (DTCS [M~1~]; MI[M~2~]). These reactivities show strong alternation, and the propagating copolymer radicals proceed with homopolymerization of 1:1 complexes formed between the donor and acceptor monomers. These alternating copolymers exhibit highly branched structure and are actually hyperbranched copolymers. The compact nature of the hyperbranched molecules was demonstrated by comparison of their dilute‐solution properties with those of the linear analogues. The hyperbranched macromolecules behave as single, well‐separated molecules (even in good solvent) and as hard spheres. Copyright © 2003 Society of Chemical Industry

📜 SIMILAR VOLUMES

Synthesis, Characterization, and Thermal
Synthesis, Characterization, and Thermal Properties of Block Copolymers Containing Poly(styrene-co-4-vinylpyridine) and Poly(styrene-co-butyl acrylate) by Controlled Radical Polymerization
✍ Carsten Taube; Marta Fernández García; Gudrun Schmidt-Naake; Hartmut Fischer 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 275 KB

## Abstract Radical polymerization of styrene and mixtures of styrene and 4‐vinylpyridine was performed in the presence of 2,2,6,6‐tetramethylpiperidine‐__N__‐oxyl (TEMPO) producing polymers with controlled molecular weights and molecular weight distributions. The living nature of these polymers wa

Synthesis of styrene–acrylonitrile rando
Synthesis of styrene–acrylonitrile random copolymers (SAN) and polyarylate block copolymers and the control of their mechanical properties by morphology generation
✍ Hiroshi Ohishi; Souichiro Kishimoto; Takayuki Ikehara; Toshio Nishi 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 313 KB 👁 2 views

The idea of repulsion in random copolymers was applied to the miscibility modification between polystyrene (PS) and polyarylate (PAr) segments of PS-PAr block copolymer (PAr-PS-PAr). Acrylonitrile (AN), which has a large positive interaction parameter against styrene, was used as a miscibility modif