The incorporation of the filler into the polymer results in new materials. The properties of these composites are determined by the characteristics of the components, composition, interfacial interactions, and structure. Both aggregation and orientation of anisotropic filler particles affect strongly composite properties. Mineral filled polymers are used in a wide range of applications, mostly in fields in which increased stiffness and heat resistance are required. Although CaCO3, talc and glass fibers are used in the largest quantities, new fillers and novel composites also gain increasing importance in this field.
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