Abstract
A multiarm star-shaped polystyrene (PS) was prepared from polystyrene-block-poly(glycidyl methacrylate) (PS-b-PGMA) by combination of atom transfer radical polymerization (ATRP) and cationic-ring opening polymerization (CROP). First, ATRP of styrene was carried out using ethyl 2-bromoisobutyrate (EIBr) as the initiator and copper halide (CuBr) with N,N,N′,N″, N″-pentamethyldiethylenetriamine (PMDETA) as the catalyst system in bulk at 110°C. Then, previously obtained PS was used as a macroinitiator for ATRP of glycidyl methcrylate (GMA) using CuCl/PMDETA as the catalyst system in anisole at 60°C. This produced an AB-type di-block copolymer (PS-b-PGMA) with a controlled molecular weight and low polydispersity (Mw/M n = 1.15). As a third step, CROP of pendant oxirane rings of PS-b-PGMA di-block co-polymer led to a multi-arm star-shaped PS in a novel approach. The obtained polymers were characterized by gel-permeation chromatography and 1H-NMR.
| Original language | English |
|---|---|
| Pages (from-to) | 393-401 |
| Number of pages | 9 |
| Journal | Designed Monomers and Polymers |
| Volume | 9 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2006 |
Funding
The authors thank the Scientific and Technical Research Council of Turkey for a Ph.D. scholarship and the Research Fund of Istanbul Technical University for their financial support of this work.
| Funders | Funder number |
|---|---|
| Türkiye Bilimsel ve Teknolojik Araştirma Kurumu | |
| Istanbul Teknik Üniversitesi |
Keywords
- Atom transfer radical polymerization (ATRP)
- Cationic ring opening polymerization (CROP)
- Multiarm star-shaped polymer
- Polystyrene-block- poly(glycidyl methacrylate)