ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The monomer structure of several linear high polymers in monolayers has been studied with an automatic recording film balance and surface potentiometer of very high precision. The method is based on the resolution of the monomer structure from estimation of the limiting areas of the force - area and surface - potential area curves. The structures of poly(vinyl acetate), poly(vinyl alcohol), poly(methyl methacrylate), poly-(methacrylonitrile), and ethoxylin polymer have been determined. In addition the secondary cohesion, which corresponds to its three-dimensional equivalent, was related to the stability of the polymer film. It was found in the vinyl polymer series that secondary cohesion decreased in the order poly(vinyl alcohol), poly(methacrylonitrile), poly(methyl methacrylate), poly(methyl acrylate) to poly(vinyl acetate). Alternatively a comparison of specific areas at A/W and O/W interfaces renders conclusion on the rigidity of a polymer. Whereas poly(vinyl acetate) showed identical areas at both interfaces, poly(methyl methacrylate) spread to larger areas at the O/W interface. From this it is evident that the α-methyl group in the vinyl chain exerted strong cohesive forces. This effect was even more pronounced with the ethoxylin resin with two benzene rings in the monomer unit. Application of a statistical mechanical equation for the two-dimensional behavior of linear polymer indicated also that whereas poly-(vinyl acetate) is a flexible chain, ethoxylin polymer is a rigid chain.
Additional Material:
16 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1957.1202511107
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