Abstract
AbstractLight scattering and viscosity measurements have been carried out on random copolymers of methylmethacrylate with methyl, ethyl, and n‐butylacrylate as well as n‐butylmethacrylate in acetone at 20°C. The parent homopolymers have also been included in the measurements. Unperturbed dimensions and excluded volume parameters were evaluated from the experimental data. It has been found that the Flory's hydrodynamic constant Φo in copolymer systems exceeds the value calculated and experimentally determined for binary homopolymer solutions. Also, in a fairly good solvent, the copolymer coil behaves as if it were less expanded than it is in reality. The short range interactions exceed the mean value calculated from homopolymers in combining an α‐substituted monomer with an unsubstituted one. Long range interactions resulting from heterocontacts can be determined quantitatively and related to the incompatibility of the parent homopolymers.
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Schedule a callMore From: Journal of Polymer Science Part C: Polymer Symposia
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