POLYMERIC, COMPOSITE AND CERAMIC MATERIALS - 39013

Macromolecule, polymer and polymer material. Thermoplastics, thermosets, elastomers and fibers. Linear and crosslinked polymers, copolymers. Degree of polymerization and average molecular weight. Crystalline polymers and amorphous polymers. Melting point and glass transition temperature. Mechanical properties of polymeric materials. Viscoelasticity. Tensile test of polymers. Effect of temperature and strain rate on the mechanical behavior of polymeric materials. Theory of linear viscoelasticity. Electrical, optical and thermal properties of polymers. Technologies of processing of polymeric materials. Degradation of polymeric materials. Main polymeric materials: polyethylene, polypropylene, polystyrene and polyvinylchloride. Reuse and recycle of polymers. Definition of ceramic materials. Traditional ceramics. Structure of silicates, clays and feldspars. Plasticity of the clay. Processing of traditional ceramic: effect of water content, shrinkage and final porosity. Ceramic powders and sintering of advanced ceramics. Mechanical properties of ceramic materials: stiffness and toughness. Effect of porosity and defects, fracture mechanics. Anisotropy behavior of tension/compression. Tests for the characterization of the mechanical behavior of ceramic materials. Abrasives and refractory materials. Alumina, silica carbide, zirconia. Thin ceramic coatings. Glasses: structure, classification and properties. Processing technologies and applications. Degradation of ceramics and glass. Definition and classification of composite materials. Reinforcement materials (fibers and particles). Production and properties of fibers of boron, carbon, glass and aramid. Natural fibers. Semi-finished fiber (mat, rowing, woven, etc.). Properties of the main classes of polymeric matrix. Thermosetting polyester, vinyl and epoxy. Thermoplastic matrix. . Gelation, curing and post-curing. Interface and adhesion reinforcement / matrix. Mechanical properties of composites, anisotropy. Micromechanical models. Models of Voigt and Reuss. Composite laminates. Elastic properties of composite laminates. Criterion of Krenchell. Tensile strength of long fiber composites and multilayer laminates. Elastic properties of composites reinforced with short fibers. Toughness. Production of composite materials with polymeric matrix: manual impregnation, pultrusion, prepreg technique and the vacuum bag. Aging and degradation of composite materials. Environmental impact and recycling. Metal matrix composites. Mechanical properties of metal matrix composites. Technologies for obtaining and processing, uses and degradation of the metal matrix composites. Materials ceramic matrix composites. Applications of ceramic matrix composites, carbon/carbon composites. Sandwich structures, properties and examples.

Seminars:

+ Wood. Shrinkage, distortion and defects in the wood. Mechanical properties and effect of moisture. Wood products (honeycomb, plywood, laminated wood). Degradation of the wood.

+ Fiber reinforced concrete. Main properties, types of fibers, mechanical performance, applications, non structural fibers.