Search Results - benny+freeman

3 Results Sort By:
Polybenzimidazoles Based on Monomers Derived From 4,4'-Dichlorodiphenyl Sulfone
This disclosure describes new polybenzimidazoles with high thermal stability and solubility, derived from high volume commercial precursors and are useful for high temperature films, fibers, and membranes. All of the polymers are soluble in solvents such as N-methylpyrrolidone and they have Tg's of 400 degrees Celsius or higher. No weight loss with...
Published: 2/10/2014   |   Inventor(s): James Mcgrath, Judy Riffle, Benny Freeman
Category(s): Materials, Chemicals
Gas Separation Membranes Formed By Crosslinking Polyarylene Ethers
Polyarylene ether ketone (PAEK) polymers are known to be stable to hydrolysis and have desirable thermal properties; however, they are susceptible to plasticization by CO2 and hydrocarbons, leading to swelling and a decrease in performance for gas separation applications. The present invention utilizes crosslinking to improve the performance of polyarylene...
Published: 2/10/2014   |   Inventor(s): James Mcgrath, Ruilan Guo, Yu Chen, Benny Freeman
Category(s): Chemicals, Materials
Chlorine Resistant Reverse Osmosis Membranes
Materials and methodologies have been developed for the preparation and characterization of chlorine resistant membranes, which are much better than the state of the art systems available to the reverse osmosis water purification industry. The resulting materials are based upon largely commercially available systems and reproducible polymerization...
Published: 9/3/2012   |   Inventor(s): James Mcgrath, Benny Freeman, Ho Bum Park
Keywords(s): Environment
Category(s): Energy