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DYNAMIC-MECHANICAL PROPERTIES OF POLYMERS
stress and strain are in phase in an ideal energy-elastic material, ... differential scanning calorimetry. Laboratorium für Makromolekulare Chemie Universität Siegen ... β Transitions T g Good Impact Strength Poor Higher Order Transitions affect toughness Impact was good if T g /T
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Chapter Outline: Phase Diagrams
www.eng.uc.edufunction called the free energy. Thermodynamics tells us that: Equilibrium and Metastable States • Under conditions of a constant temperature and pressure and composition, the direction of any spontaneous change is toward a lower free energy. • The state of stable thermodynamic equilibrium is the one with minimum free energy.
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www.eng.uc.edutemperatures of their peak maxima (Fig. 4b and c). Partially crystalline polymers give rise to very broad melting peaks be-cause of the size distribution of the crystal-lites (Fig. 4c). Many organic compounds melt with de-composition (exothermic or endothermic, Figs. 4d and 4e). An endothermic peak in a DSC heating curve is a melting peak if
BROOKFIELD DV-II+ Pro PROGRAMMABLE VISCOMETER
www.eng.uc.eduThe Brookfield DV-II+Pro Viscometer measures fluid viscosity at given shear rates. Viscosity is a measure of a fluid’s resistance to flow. You will find a detailed description of the science of viscosity in the Brookfield publication “More Solutions to Sticky Problems” a copy of which was included with your DV-II+Pro.
Properties of Gases and Liquids - University of Cincinnati
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