Abstract
This paper reviews the theoretical principles of the macromolecular design of polymer interface/interphase systems for obtaining maximum adhesion and fracture performance of composite materials and adhesively bonded assemblies. Subsequently, a relatively simple and industry-feasible technology for surface grafting molecular brushes is discussed in detail and supported by a range of experimental examples. It is shown, in agreement with contemporary theory, that the use of chemically attached graft chemicals of controlled spatial geometry and chemical functionality enables a significant increase in the strength and fracture energy of the interphase, to the point of cohesive fracture of the substrate, or that of an adjacent medium such as adhesive, elastomer or matrix material. This occurs even after prolonged exposure of investigated systems to adverse environments such as hot water.
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