Paste

A high viscosity material that resists flowing on a vertical surface.

Pigment

A coloring agent.

Plastic

Highly polymeric materials that deform under stress and temperature. See and .

Polymerize

To unite chemically two or more monomers of polymers of the same kind to form a molecule with higher molecular weight.

Post Cure

Additional time/heat cycles to which a cured thermosetting plastic is subjected in order to enhance the properties.

Pot Life

The amount of time a mixed material may be easily used at a specific temperature. It Is usually measured as the time it takes for a material to double in viscosity.

Potting

The process of dispensing an insulating material into a container. Typically, the container remains as an integral part of the unit.

Pressure Gellation

A process for molding in which the shrinkage is minimized by forcing the material under pressure into the mold and gelling it in stages.

Promoter

See Accelerator

 

 

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Release Agent

A chemical agent used to prevent a material from adhering to a surface such as a mold.

Resin

An organic substance of natural or synthetic origin characterized by being polymeric in structure.

Resistivity

The ability of a material to resist passage of electric current through itself or on its surface. The unit of volume resistivity is the ohm-cm, of surface resistivity, the ohm.