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FRACTURE LONGTERM PHENOMENA
FRACTURE SHORTTERM PHENOMENA
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abrasion resistance Abstr amorphous Appl applied ASTM behavior breaking stress brittle fracture brittle strength changes chemical cold drawing constant copolymers crack crosslinking crystalline polymers crystallization decreases density dependence draw ratio ductile effect elastic elastomers elastoviscous energy to break environmental stress-cracking equation extension fabrics factor failure fibers films flexural friction glass glass-transition temperature impact resistance impact strength impact test increases indentor Izod linear load machine macromolecules material measured mechanical properties method methyl methacrylate modulus molding molecular weight molecules necking rupture notch obtained occurs orientation hardening particles Plastics poly poly(methyl methacrylate poly(vinyl chloride polycarbonate polyethylene Polymer Sci polymeric bodies polypropylene polystyrene resins Rubber Chem rubbery deformation samples spherulites strain stress-strain curve supermolecular structure Technol tensile impact tensile strength test piece tester thermal thermomechanical curve thermoplastics tion toughness transition true stress-strain curve V. A. Kargin viscosity wear yield stress