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Model Engineering Glossary: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
The state in which two surfaces are held together by interfacial forces which may consist of valence forces or interlocking action.
Adhesion between surfaces in which the adhesive holds the parts together by interlocking action.
Adhesion between surfaces which are held together by valence forces or molecular bonding.
A substance capable of holding material together by surface attachment.
Failure resulting from insufficient bond between the adhesive and one or both sustrates. Adhesive strips away from substrates.
An adhesive is in tensile loading when the acting forces are applied at right angles to the plane of the adhesive. The tensile strength of a bond is the maximum tensile load per unit area, required to break the bond expressed in pounds per square inch.
Non-crystalline. Most plastics are amorphous at processing temperature. Many retain this strength under normal temps.
Compounds that retard the rate of oxidation of a polymer.
The purified liquid adhesive before any stabilizers or thickening agents are added to it.
Occurs when internal strength of the adhesive is not as great as the forces applied to it. Adhesive remains bonded to both sustrates.
A state of molecular structure in some polymers denoting uniformity and compactness of the molecular chains.
Deleterious change in the chemical structure of a plastic reflected in its appearance or physical properties.
That property of a dielectric which determines the electrostatic energy per unit volume for unit potential grade.
The voltage at which an insulating material can withstand before breaking down occurs, usually expressed as volts per mil.
The tangent of the loss angle of the insulating material.
The fractional increase in length of a material stressed in tension.
Enclosing an article in an envelope of adhesive.
Co-polymers of the polyolefins family derived from random co-polymerization of acetate and ethylene.
Migration of adhesives from the interior to the surface of plastic.
The greatest longitudinal stress a cast film (125 mils thickness) can bear without tearing apart.
A purification process where the raw monomer is heated to a precise, temperature controlled, constant boiling mixture. Then the vapor (gas) from this boiling mixture is cooled and transfered to the distillation column at an exact, specific temperature. The purpose is to remove any chemical impurities from the monomer.
The temperature at which a bond subjected to a PSI load fails.
A characteristic of hot melts in that they have holding power even while in the liquid hot state.
Decomposition of a substrate by reaction with water.
Capable of absorbing and retaining environmental moisture.
Adhesion between surfaces in which the adhesive holds the parts together by interlocking action.
Migration of adhesives from the interior to the surface of a plastic.
The sum of the atomic weight of all atoms in a molecule.
The uncured liquid adhesive.
The entering of an adhesive into a substrate.
A polymer in which the structural units are linked by ester grouping.
A chemical compound or mixture of componds formed by polymerization.
A chemical reaction in which two or more small molecules continue to form larger molecules that contain repeating structural units of the original molecules. [Reproduction of parts].
A polymer in which the structural units are linked by amide grouping.
Enclosing and article in an envelope of adhesive.
The ability of a material to resist passage of electrical current either through its bulk or surface.
An adhesive is in tensile loading when the acting forces are applied parallel to the plane of the adhesive. The tensile strength of an adhesive bond is the maximum tensile load per unit area required to break the bond. Expressed in pounds per square inch.
The density (mass per unit volume) of any material divided by that of watwerter at a standard temperature ; specific gravity of water= 1:00.
Ability of a material to conduct heat.
A material capable of being repeatedly softened by heat and hardened by cooling.
A material which will undergoe a chemical reaction by action of heat, catalysts etc.. Leading to a relatively infusible state.
The measure of the resistance of a fluid to flow usually expressed in poise (or centipoise). A higher reading indicates thicker material.
Model Engineering Glossary: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z