Study of polymer-polymer interaction coefficients in polymer blends using inverse gas chromatography

Abstract

A blend of poly(methy1 acrylate) and poly(epich1orohydrin) was studied by inverse gas chromatography. In agreement with older studies on polymer blends, the apparent polymer-polymer interaction coefficient was found to be dependent on the chemical nature of the probe. An analysis of the experimental errors showed that the dependence is real and not an artifact. A probe-dependent term in the apparent interaction coefficient can be readily understood when the thermodynamic analysis is based on an expression for AG-which is more general and/or reflects a different model of interaction than the simple expression employed routinely. Analysis is presented for two expressions for AGmh. Thus the apparent variability of the polymer-polymer interaction coefficient changes from an experimental nuisance into a valuable tool for understanding the thermodynamics of polymer blends.

Organic−Inorganic Hybrid Nanoparticles: Surface Characteristics and Interactions with a Polyester Resin

“…The polyester resin without commercial silica in the uncured form (PEs) was coated onto a support material (Chromosorb, Sigma) for IGC analysis, following the technique of Al-Saigh and Munk 14 . For comparison, a thermoplastic polystyrene (PS) was also examined by IGC.…”

Interaction Parameters of Surfactant Mixtures by Inverse Gas Chromatography

“…In both methodologies, if the conditions given by Al-Saigh and Munk (Al-Saigh & Munk, 1984) are obeyed, the surfactant-surfactant interaction parameter can be calculated through the specific retention volume without calculating the individual parameter.…”

“…On the contrary, positive values of B 23 would indicate repulsive interactions between the two polymers and they are related to immiscibility (Al-Saigh & Munk, 1984;Benabdelghani, et al, 2006;Deshpande, et al, 1974;DiPaola-Baranyi &. Degre, 1981;Etxeberria et al, 2000;Shi & Screiber, 1991).…”

Interfacial chemistry of epoxy adhesives on hydrated cement paste

“…R and H compounds were mixed in CHCl 3 (Aldrich) at stoichiometric and nonstoichiometric (excess resin) molar ratios. The R/H mixtures were then coated onto cement-paste particles by the well known 'soaking' method of Al Saigh and Munk [9] and cured at room temperature. The resulting materials are abbreviated as OPC-R x% + H st or OPC-R x% + H yst where x is the mass loading of R, st stands for stoichiometric loading of H and y is the fraction of stoichiometric loading when it applies.…”