433712-91-5Relevant academic research and scientific papers
Synthesis and Characterization of Phenylphosphine Oxide Containing Perfluorocyclobutyl Aromatic Ether Polymers for Potential Space Applications
Jin, Jianyong,Smith Jr., Dennis W.,Topping, Chris M.,Suresh,Chen, Shengrong,Foulger, Stephen H.,Rice, Norman,Nebo, Jon,Mojazza, Bob H.
, p. 9000 - 9004 (2007/10/03)
A novel class of phenylphosphine oxide (PPO) containing perfluorocyclobutyl (PFCB) polymers has been developed for potential use as multifunctional materials in space environments. The reaction of p-BrArOCF=CF2 (for Ar = phenyl and biphenyl) with tert-butyllithium affords the lithium reagent smoothly below -20 °C. Subsequent substitution with phenylphosphonic dichloride provides the first bis(trifluorovinyl ether) monomers containing the PPO group. Polymerization proceeds thermally above 150 °C to give polymers that exhibit glass transition temperatures of 169 and 224 °C, respectively, and catastrophic weight loss by TGA in N2 and air above 450 °C (10 °C/min). Copolymerization with bis(4,4′-trifluorovinyloxy)biphenyl affords film-forming transparent thermoplastic copolymers with high Tg (>140 °C) and good thermal stability (>450 °C). Initial evaluations with ground-based simulation of atomic oxygen (AO) rich space environments indicate that the PPO group imparts significant space durability to PFCB polymers.
