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- Title
Synthesis and characterization of optically active star?shaped poly (N?phenylmaleimide)s with a calixarene core.
- Authors
Liping Lou; Liming Jiang; Jianzhao Liu; Weilin Sun; Zhiquan Shen
- Abstract
Two N?phenylmaleimide derivatives bearing a chiral oxazoline group, N?[o?(4?phenyl?4,5?dihydro?1,3?oxazol?2?yl)phenyl]maleimide [(R)?PhOPMI] and N?[o?(4?isopropyl?4,5?dihydro?1,3?oxazol?2?yl)phenyl]maleimide [(S)?PriOPMI], were polymerized using in situ generated calixarene?based phenates as initiators to yield optically active polymers. The formation of star?shaped architectures was strongly dependent on both polymerization conditions and calixarene moieties. In the case of polymerization conducted in toluene at 80–100 °C, the arm?chain numbers achieved their respective maxima for the polymers with these multifunctional initiators. In contrast, the polymers obtained in polymerizations at lower temperature possessed fewer arm chains. The structure and chiroptical properties were investigated on the basis of 13C NMR, multiangular laser light scattering, gel permeation chromatography, and circular dichroism for the macromolecules with calixarene cores. Copyright © 2006 Society of Chemical Industry
- Subjects
POLYMERS; MACROMOLECULES; POLYMERIZATION; TOLUENE; AROMATIC compounds
- Publication
Polymer International, 2007, Vol 56, Issue 6, p796
- ISSN
0959-8103
- Publication type
Article
- DOI
10.1002/pi.2211