Chemical reaction which joins two or molecules to form a more complex molecule whose molecular weight is a multiple of the original and whose physical properties are different, which is used when manufacturing silicon resins, acrylic resins, polystyrene resins, etc.
Polypropylene
Any of various thermoplastic resins that are polymers of propylene. They are hard and tough, and are used to make molded articles and fibers.
Polystyrene
Plastic manufactured as clear sheets, foam beads or foam boards, which are formed from the polystyrene foam beads expanding with heat in a mold. Insulating board has a high R-value, or thermal resistance. For this reason, it is often used as roof deck sheathing.
Polysulfide
Synthetic rubber-like substance used as caulking or sealing for gaskets. It is weather and chemical resistant in both solid and liquid forms.
Polytetrafluoroethylene
Teflon type material with good heat and chemical resistance.
Polyurethane
Polymer plastic most often found in paint, varnish, and insulating foam. The rigid board form has high thermal resistance, while the liquid foam is pressurized, permitting the foam to be directed into small spaces.
Polyurethane foam
Board Insulating board that has a higher R-value per inch thermal resistance than fiberglass batting and, consequently, takes up less space.
Polyvinyl acetate
A synthetic resin largely used as a vehicle for many latex paints. Often referred to as PVA.
Polyvinyl acetate glue
White, non waterproof, glue which forms a very strong joint for use in non-humid and indoor use.
Polyvinyl chloride (pvc)
A thermoplastic polymer that can be compounded into flexible and rigid forms through the use of plasticizers, stabilizers, fillers, and other modifiers; rigid forms are used in pipes; flexible forms are used in the manufacture of sheeting and roof membrane materials.
