Abstract:
A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing: i) an azo (-N=N-) content of from 0.30% to 0.80%, as measured by pyrolysis gas chromatography; and ii) a dissociated carboxylate content of at least 0.18 mol/kg as measured by RBS at pH 9.5.
Abstract:
Crosslinkable interpolymer blends comprising ethylene monomer residues, residues of comonomers having carboxylic acid and/or carboxylic acid anhydride functionality, and residues of comonomers having epoxide functionality, a peroxide initiator, and optionally a crosslinking catalyst, which, in embodiments, cure to a gel content of greater than (>) 50 wt%within less than 1.5 minutes at 200~C, and require little or no degassing after crosslinking.
Abstract:
A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing: i) an azo (-N=N-) content of from 0.40% to 1.00%, as measured by pyrolysis gas chromatography; and ii) a dissociated carboxylate content of at least 0.40 mol/kg as measured by RBS at pH 9.5.
Abstract:
A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing an azo (-N=N-) content of from 0.75% to 0.95%, as measured by pyrolysis gas chromatography.
Abstract:
A thin film composite polyamide membrane including a porous support and a thin film polyamide layer which is a reaction product of m-phenylene diamine (mPD) and trimesoyl chloride (TMC), wherein the membrane is characterized by the thin film polyamide layer having a dissociated carboxylic acid content of at least 0.18 moles/kg at pH 9.5, and wherein pyrolysis of the thin film polyamide layer at 650C results in a ratio of responses from a flame ionization detector for fragments produced at 212 m/z and 237 m/z of less than 2.8.