Accession Number:
ADA603161
Title:
Functionalization of Fluoroalkyl Polyhedral Oligomeric Silsesquioxanes (F-POSS) (Post Print)
Descriptive Note:
Journal article
Corporate Author:
AIR FORCE RESEARCH LAB EDWARDS AFB CA
Personal Author(s):
Report Date:
2012-08-01
Pagination or Media Count:
16.0
Abstract:
Incompletely-condensed fluoroalkyl-functional Polyhedral Oligomeric SilSesquioxanes F-POSS have been synthesized via a scaleable three-step synthetic process with an overall yield of 52. The primary byproduct of each step in the synthesis is the completely-condensed F-POSS starting material, which enables the recycling of the starting materials. The incompletely condensed structures were readily reacted with a variety of functional dichlorosilanes to introduce reactive or unreactive functionality and produce unsymmetrical F-POSS structures. Chemical structures were confirmed by elemental analysis, multinuclear NMR 1H, 13C, 19F, and 29Si, and FT-IR methods. Single crystal X-ray diffraction was used to elucidate the crystal structure of the precursor F-POSS disilanol. The functionalized F-POSS structures were found to possess variable solubility properties, generally superior to those of the closed-cage F-POSS starting material. Dynamic contact angle measurements of these compounds were examined using water and hexadecane as the wetting liquids. Copolymers of polymethyl methacrylate containing F-POSS were synthesized from methacrylate F-POSS macromers. These novel structures can be used as building blocks for the development of low surface energy materials.
Descriptors:
Subject Categories:
- Polymer Chemistry