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Preferred‐handedhelical conformation in organic–inorganic hybrid block copolymers with well‐controlledstereoregularity
- Source :
- Journal of Polymer Science; March 2022, Vol. 60 Issue: 5 p766-773, 8p
- Publication Year :
- 2022
-
Abstract
- A novel block copolymer containing polyhedral oligomeric silsesquioxanes (POSS) features a well‐controlled stereoregularity, that is, isotactic polymethacrylate‐functionalized POSS‐b‐polymethyl methacrylate (it‐PMAPOSS‐b‐PMMA), was prepared via controlled‐anionic polymerization. The stereoregularity of each segment in the it‐PMAPOSS‐b‐PMMA is evaluated using nuclear magnetic resonance (NMR) spectroscopy, which reveals an isotactic configuration in both the PMAPOSS and PMMA segments. The secondary structure of it‐PMAPOSS‐b‐PMMA in a mixture with a small chiral dopant is clarified with electronic circular dichroism and vibrational circular dichroism measurements. By adding a chiral dopant, a controlled preferential helical conformation of the unilateral segment in achiral it‐PMAPOSS‐b‐PMMA is achieved.
Details
- Language :
- English
- ISSN :
- 26424150 and 26424169
- Volume :
- 60
- Issue :
- 5
- Database :
- Supplemental Index
- Journal :
- Journal of Polymer Science
- Publication Type :
- Periodical
- Accession number :
- ejs59054969
- Full Text :
- https://doi.org/10.1002/pol.20210761