title: Solubility and surface thermodynamics of conducting polymers by inverse gas chromatography. III: polypyrrole chloride.
abstract: Inverse gas chromatography, IGC, was applied to characterize conducting polypyrrole chloride (PPyCl) using twenty three solvents. IGC is able to reveal the change in the morphology, the strength of solvent-PPyCl interactions, thermodynamics parameters (χ12, Ω1(∞)), solvent and polymer solubility parameters, and molar heats of sorption, mixing and evaporation (ΔH1(s), ΔH1(∞), ΔH1(v)). The following solvents showed stronger interactions than others; yet, none of these solvents are good solvents for PPyCl: dodecane among the alkane family, tetrahydrofuran and methyl ethyl ketone among the oxy and keto group, dichloromethane among the chlorinated group up to 120°C and chloroform at 180°C, and toluene among the cyclic and aromatic group. Overall, the groups showed higher affinities to PPyCl are: acetates, oxy and cyclic, and chlorinated groups. Comprehensive solvents and PPyCl solubility parameters are obtained. The latter showed that PPyCl is not soluble in any solvent used.
authors.affiliation: Science Department, King Abdulaziz Military Academy, Riyadh, Saudi Arabia.
authors.forename: Omar K
authors.initials: OK
authors.lastname: Duaij
authors.forename: Ali
authors.initials: A
authors.lastname: Alghamdi
authors.forename: Zeki Y
authors.initials: ZY
authors.lastname: Al-Saigh
mesh_terms: D002712:Chlorides / Q000737:chemistry; D002849:Chromatography, Gas / Q000295:instrumentation / Q000379:methods*; D009930:Organic Chemicals / Q000737:chemistry / Q000302:isolation & purification; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D012995:Solubility; D013816:Thermodynamics
chemical_list: D002712:Chlorides; D009930:Organic Chemicals; D011108:Polymers; D011758:Pyrroles; C067635:polypyrrole