Adhesion of Polymers
Providing in-depth coverage of properties, techniques, and step-by-step methods, this valuable sourcebook gives you the most comprehensive coverage available to create, apply, and analyze these critically important substances.
TABLE OF CONTENTS Adhesion of Polymers
3.3: Adhesives Based on Thermodynamically Incompatible Polymeric Mixtures
3.3 Adhesives Based on Thermodynamically Incompatible Polymeric Mixtures
The properties of polymeric mixtures depend on the compatibility of the system components. Mixtures in which the polymeric components are incompatible can be considered by analogy with filled polymers. In such systems one component distributed within the continuous phase of another serves as filler. The principal regularity of the physical-chemical and mechanical behavior of the filled polymers, the boundary layers in particular, is maintained when the filler is also a polymer.
Of special interest are the systems obtained in the course of polymerization of monomers in which another polymer is dissolved but is not compatible with the polymers obtained from these monomers. In such a case, at certain degrees of polymerization the dissolved polymer precipitates in form of the dispersed phase owing to the appearance of incompatibility; the content and size of the particles of the dispersed phase can be controlled by changing the polymers' compatibility, their weight ratio, the system viscosity, and the rate of polymerization.
3.3.1 Adhesives Based on Acrylic Polymer Mixtures
Let us consider the effect of PBMA particles precipitated from polymerizing MMA or from its mixture with butyl methacrylate (BMA) on the properties of the polymeric mixture in the adhesive interlayer. PBMA is dissolved in a reactive system.
For the monomer polymerization at room temperature, the adhesive was augmented with a redox system of 3% BP and 0.75% DMA. To study, explain, and predict the development of the elastic failure of the polymer in the adhesive interlayer, an...
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