Photo-responsive Polymers and their Applications to Optical Memory
摘要:
We synthesized photo-responsive azo polymers from novel malonic ester and silicate ester monomers having two symmetrical azobenzene groups in the side chain. The possibility of their applications as reversible data storage media was investigated utilizing optical data recording techniques. As a result, the azo polymers had very excellent stability and resolution of the stored data as well as the sensitivity to pump beam. The polymeric thin films also could be used as erasable digital data materials for a practical use by an Ar ion pulse laser (pulse width: 10 mu s). In addition, the polymeric thick films (500-1000 mu m) from new monomer and methyl methacrylate showed good angular selectivity for holographic memory by using optical two wave mixing technique.
The present invention relates to polymeric compositions useful in the manufacture of biocompatible medical devices. More particularly, the present invention relates to certain monoethylenically unsaturated polycarbosiloxane monomers capable of polymerization to form polymeric compositions having desirable physical characteristics useful in the manufacture of ophthalmic devices.
Novel cyclic siloxane compounds have both an aliphatic unsaturation-containing organic group and fluorinated alkyl groups within the molecular structure. When used to form silicone fluids and rubbers, they are useful as a modifier for giving novel physical properties thereto and when used as polymerizable monomers, they are effective for improving the performance of polymers or forming polymers with novel physical properties.
Incompletely Condensed Fluoroalkyl Silsesquioxanes and Derivatives: Precursors for Low Surface Energy Materials
作者:Sean M. Ramirez、Yvonne J. Diaz、Raymond Campos、Rebecca L. Stone、Timothy S. Haddad、Joseph M. Mabry
DOI:10.1021/ja208506v
日期:2011.12.21
was developed for the controlled functionalization of fluorinatedpolyhedraloligomericsilsesquioxanes (F-POSS), which are useful as low surface energy materials for superhydrophobic and superoleophobic materials. Utilizing triflic acid, open-cage compounds were created and then reacted with a variety of dichlorosilanes to produce functional F-POSS structures possessing alkyl-, aryl-, and acrylate-based