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Star‐branched and hyperbranched polyisobutylenes
Author(s) -
Puskas Judit E.,
Grasmüller Martin
Publication year - 1998
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19981320113
Subject(s) - isobutylene , polymer chemistry , styrene , polystyrene , materials science , polymer , star (game theory) , polymerization , copolymer , star polymer , cationic polymerization , composite material , physics , astrophysics
The synthesis of branched (star‐branched and hyperbranched) polyisobutylenes (PIBs) is described in this paper. Multiarm‐star and brush‐like structures were prepared by using a tert ‐hydroxy functionalized polystyrene macroinitiator (4‐(l‐hydroxy‐l‐methylethyl)styrene‐ co ‐styrene (HMESt‐ co ‐St). These polymers were characterized by SEC‐light scattering. The first successful synthesis of gel‐free high molecular weight hyperbranched PIBs was achieved by using HMESt as an inimer ( in itiator‐mono mer ) in conjunction of living isobutylene (IB) polymerization. Initial characterization of the structure of this polymer included SEC analysis and selective destruction of the HMESt‐junctions.