Interphase design characteristics

Experimental data for standard Charpy impact suength was analyzed for array of particulate-filled and rubber-modified polypropylene composites (90). Table 6.1 summarizes interphase design characteristics. 

The final combination of ingredients promotes an adhesive bond between the polymer matrix and load-bearing glass-fiber reinforcement. Consequently, the physicochemical characteristics of the microstructure based on the interphase design determine the ultimate mechanical and other properties of filled or glass-fiber reinforced polypropylene resins. 

Abstract Multicomponent materials based on synthetic polymers were designed and used in a wide variety of common and hi-tech applications, including the outdoor applications as well. Therefore, their response to the UV radiation and complex weathering conditions (temperature, seasonal or freeze—thaw cycles, humidity, pH, pollutants, ozone, microorganisms) is a matter of utmost importance in terms of operational reliability and lifetime, protection of the environment and health safety. This chapter offers an overview of this subject and a critical assessment of more particular topics related to this issue. Thus, various types of multicomponent systems based on thermoplastic and thermosetting polymer matrices were subjected to natural and/or simulated UV radiation and/or weathering conditions. Their behavior was evaluated in correlation with their complex formulation and taking into consideration that the overall effect is a sum of the individual responses and interactions between components. The nature and type of the matrix, the nature, type and size distribution of the filler, the formation of the interphase and its characteristics, the interfacial adhesion and specific interfacial interactions, they all were considered as factors that influenced the materials behavior, and, at the same time, were used as classification criteria for this review. 

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