engleski

Defects in polymer materials as design process consequence

Consumer interest is always focused on properties of some materials or final articles. There is an eternal need for better materials and better products. But, the properties of any material or product are a response of its structure to external conditions. Properties of polymers are processing-sensitive. Thermoplastic polymers form their final structure and morphological order after their processing. Thermosetting polymer processing includes always a chemical reaction as the final stage of polymerization. Furthermore, thermoset resin are very rigid, inflexible and brittle, so they have to be reinforced. Most of these materials are composites. In both cases, the final product properties are strongly affected by structure designing (processing) and product design. The paper deals with investigation of the structure of commercial materials and products in attempt to explain their failure in use.

ctructural defects; void content; optical polarizing microscope; polybutene; poly(buthylene therephtalate); glass-reinforced polyester composite

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