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DM terms 3

Terminology of matter and adhesion

A material substrate that is bonded to another material by means of an adhesive Adherend
A molecular or atomic attraction between two contacting surfaces promoted by the interfacial force of attraction between the molecules or atoms of two different species Adhesion
Substance that promotes adhesion of one substance or material to another Adhesive
Process of joining two materials by means of an adhesive agent that solidifies during the bonding process Adhesive bonding
Force of molecular attraction between molecules or atoms of the same species Cohesion
Angle of intersection between a liquid and a surface of a solid that is used as a measure of wettability, whereby no wetting occurs at a contact angle of ___A___° and complete wetting occurs at an angle of ___B___° Contact angle; A=180; B=0
Proportionality constant representing the amount of a substance diffusing through a unit area and a unit thickness under the influence of a unit concentration gradient at a given temperature Diffusion coefficient
Temperature at which a sharp increase in the thermal expansion coefficient occurs, indicating increased molecular mobility Glass transition temperature
Thermal energy required to convert a solid to a vapor Heat of vaporization
Thermal energy required to convert a solid to a liquid Latent heat of fusion
Relative linear change in length per unit of initial length during heating of a solid per °K within a specified temperature range Linear coefficient of expansion
Equilibrium temperature at which heating of a pure metal, compound, or eutectic alloy produces a change from a solid to liquid Melting temperature (melting point)
Mechanical adhesion associated with bonding of an adhesive to a roughened adherend surface Micromechanical bonding
Tenacious deposit of microscopic debris that covers enamel and dentin surfaces that have been prepared for a restoration Smear layer
Interfacial tension, usually between a liquid and a solid surface, which occurs because of unbalanced intermolecular forces Surface tension
Relative affinity of a liquid for the surface of a solid Wettability
Relative interfacial tension between a liquid and a solid substrate that results in a contact angle of less than 90° Wetting
Short-range force of physical attraction that promotes adhesion between molecules of liquids or molecular crystals van der Waals forces
Created by: sean.sebourn

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