Investigation of thermodynamic properties of poly(methyl methacrylate-co-n-butylacrylate-co-cyclopentyl styryl-polyhedral oligomeric silsesquioxane) by inverse gas chromatography.
The thermodynamic properties of poly(methyl methacrylate-co-butyl acrylate-co-cyclo -pentylstyryl polyhedral oligomeric silsesquioxane) (poly(MMA-co-BA-co-styryl-POSS)) were investigated by means of inverse gas chromatography (IGC) using 20 different kinds of solvents as the probes. Some thermodynamic parameters, such as molar heats of sorption, weight fraction activity coefficient, Flory-Huggins interaction parameter, partial molar heats of mixing and solubility parameter were obtained to judge the interactions between POSS-contained polymers and solvents and the solubility of the polymers in these solvents. It was found that acetates, aromatic hydrocarbons and hydrocarbon halides were good solvents, n-hexane, ethanol, n-propanol, n-butanol and n-pentanol were moderate solvents, while n-heptane, n-octane, n-nonane, n-decane and methanol were poor solvents for all POSS-contained polymers within the experimental temperature range. Incorporation of POSS in polymer increased the solubility of polymers in solvents, and the more the POSS in polymer was, the better the solubility was and stronger the hydrogen bonding interaction was, but the POSS content in polymers seemed to have no obvious influence on the solubility parameter of polymers.
Zou
Qi-Chao
QC
Faculty of Chemistry and Material Science, Hubei University, Wuhan, China.
Zhang
Shi-Ling
SL
Wang
Shi-Min
SM
Wu
Li-Min
LM
D002849:Chromatography, Gas / Q000379:methods*; D017646:Organosilicon Compounds / Q000032:analysis / Q000737:chemistry*; D019904:Polymethyl Methacrylate / Q000032:analysis / Q000737:chemistry*; D011137:Polystyrenes / Q000032:analysis / Q000737:chemistry*; D015203:Reproducibility of Results; D012995:Solubility; D012997:Solvents / Q000737:chemistry; D013499:Surface Properties; D013816:Thermodynamics
D017646:Organosilicon Compounds; D011137:Polystyrenes; D012997:Solvents; D019904:Polymethyl Methacrylate