Mixtures of methacrylic polymers in bidimensional state

Mixed monolayers of polypeptides

“…The miscibility was not ideal but with prevalently attractive energies which could be attributed to hydrophobic interactions among the chains; 4. Point 3 proved, at least for the a-forms, as found for two-dimensional mixtures of non-polypeptidic polymers, that the critical point for determining mutual compatibility is the favourable reciprocal orientation of the hydrophobic chains [4,15]; 5. The information obtained on miscibility between polypeptidic components of equal macromolecular conformation can be particularly interesting to produce a more exhaustive picture of the interactions involving model-compounds for proteins in an oriented system -the monolayer -which is a valid model for cellular membranes.…”

“…The two components were studied in the same conformation not only because it was easy to obtain twodimensional mixtures by spreading the same solvent, but above all because we wanted to confirm the results of previous studies on non-polypeptidic components, that is, that for non-ionizable substances, two-dimensional miscibility is derived primarily from the interactions between the hydrophobic chains and is therefore conditioned by their favorable reciprocal disposition to the interface [4].…”

Monolayer properties of mixtures of poly (n-Butyl methacrylate) and poly (n-Lauryl methacrylate), and their corresponding copolymers

“…Gabrielli et al (6) have showed that the mixed monolayers of two pairs of poly (methyl methacrylate) / poly (ethyl methacrylate) and poly (methyl methacrylate) / poly (butyl methacrylate) become most stable thermodynamically in 1/1 molar ratios of the mixtures due to cohesive energies between polymer segments. However, there have been so far reported relatively few studies for binary mixed monolayers of a pair of two homopolymers in which one has shorter side chains and the other longer side chains, and also for their relation to the corresponding copolymers (2,8,9,10).…”

Polylaurylmethacrylate in bidimensional mixtures with low and high molecular weight substances: effect of the chain mobility on mutual miscibility

“…In particular, the bidimensional miscibility of polymers [1,3,4] and of mixtures consisting of a polymeric substance and a low molecular weight substance [5] have been studied. It has been demonstrated that for non-ionic and non-ionizable compounds bidimensional solubility depends on the reciprocal orientation (vertical and horizontal with respect to the water-air interface) of the hydrophobic chains.…”