Abstract
Anionic polymerization high-vacuum techniques and appropriate multi-functional initiators/additives were employed for the synthesis of novel star structures of poly(n-hexyl isocyanate) (PHIC). A new trifunctional initiator prepared by the reaction of tris(4-isocyanatophenyl)methane with benzyl sodium was used for the synthesis of three-arm star PHIC. Divinyl benzene and the core-first or the arm-first core-first (in-out) approach were utilized for the synthesis of multiarm star homopolymers, (PHIC)n, star-block copolymers, (PHIC-6-PI)n, and miktoarm star copolymers, (PS) n(PHIC)n, where PS is polystyrene. The molecular characteristics obtained by size-exclusion chromatography, equipped with refractive index and two-angle light scattering detectors, nuclear magnetic resonance, spectroscopy, and dilute solution viscometry showed that well-defined structures were synthesized in this study.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2387-2399 |
| Number of pages | 13 |
| Journal | Journal of Polymer Science, Part A: Polymer Chemistry |
| Volume | 45 |
| Issue number | 12 |
| DOIs | |
| State | Published - Jun 15 2007 |
| Externally published | Yes |
Keywords
- Anionic polymerization
- Gel permeation chromatography (GPC)
- Miktoarm stars
- Poly(n-hexyl isocyanate)
- Star polymers
- Star-block copolymers
ASJC Scopus subject areas
- Polymers and Plastics
- Organic Chemistry
- Materials Chemistry