Journal article
On the structure of holographic polymer-dispersed polyethylene glycol
Polymer (Guilford), v 47(24), pp 8147-8154
2006
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Holographic polymerization (H-P) has been used to fabricate polymer-dispersed liquid crystals and pattern inert nanoparticles. In this article, one-dimensional grating structures of Norland resin and polyethylene glycol (PEG) were achieved using the H-P technique. Both reflection and transmission grating structures were fabricated. The optical properties of the reflection grating structures (also known as Bragg reflectors, BRs) are thermosensitive, which is attributed to the formation and crystallization of PEG crystals. The thermal switching temperature of the BR can be tuned by using different molecular weight PEG samples. The hierarchical structure and morphology of the BR were studied using synchrotron X-ray, polarized light microscopy and transmission electron microscopy. PEG crystals were found to be confined in ∼60
nm thick layers in the BR. Upon crystallization, the PEG lamellae were parallel to the BR surfaces and PEG chains were parallel to the BR normal, resembling the confined crystallization behavior of polyethylene oxide (PEO) in PEO-
block-polystyrene (PEO-
b-PS) block copolymers. This observation suggests that the tethering effect in the block copolymer systems does not play a major role in PEG chain orientation in the confined nanoenvironment.
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Details
- Title
- On the structure of holographic polymer-dispersed polyethylene glycol
- Creators
- Michael J Birnkrant - A. J. Drexel Nanotechnology Institute and Department of Materials Science and Engineering, Drexel University, LeBow Building, Room 443, 3141 Chestnut Street, Philadelphia, PA 19104, USAHilary K McWilliams - A. J. Drexel Nanotechnology Institute and Department of Materials Science and Engineering, Drexel University, LeBow Building, Room 443, 3141 Chestnut Street, Philadelphia, PA 19104, USAChristopher Y Li - A. J. Drexel Nanotechnology Institute and Department of Materials Science and Engineering, Drexel University, LeBow Building, Room 443, 3141 Chestnut Street, Philadelphia, PA 19104, USALalgudi V Natarajan - Science Applications International Corporation, 4031 Colonel Glenn Highway, Dayton, OH 45431, USAVincent P Tondiglia - Science Applications International Corporation, 4031 Colonel Glenn Highway, Dayton, OH 45431, USARichard L Sutherland - Science Applications International Corporation, 4031 Colonel Glenn Highway, Dayton, OH 45431, USAPamela F Lloyd - UES, Inc., 4401 Dayton-Xenia Road, Dayton, OH 45432, USATimothy J Bunning - Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, OH 45433, USA
- Publication Details
- Polymer (Guilford), v 47(24), pp 8147-8154
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000242257300010
- Scopus ID
- 2-s2.0-33750467642
- Other Identifier
- 991014878329804721
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- Collaboration types
- Industry collaboration
- Domestic collaboration
- Web of Science research areas
- Polymer Science