DIVISION 06: Plastics Flashcards
(38 cards)
It is from which relatively simple chemicals known as monomers are built up into chainlike molecules of high molecular weight called polymers; can be hard, soft, clear, opaque , light, heavy, heat resistant or easily softened by hot water.
Plastics
3 types of Plastics:
Cellulose, Synthetic resin, Plastic derived from proteins and natural resins
Its a synthetic resin plastic which softens when heated and hardens when cooled regardless of the number of times the process is repeated.
Thermoplastics
Sometimes called thermocuring plastics, set into shape permanently when heat and pressure applied during the forming stage.
Thermosetting Plastics
This material combines the transparency of glass with plastics’ shatterproof quality. Used principally for skylights, skydomes, safety glass, paints, adhesives, finish hardware lighting fixtures.
e.g. LUCITE, PLEXIGLASS
Acrylics
Primarily cellulose acetate or butyrate, used principally for paints and lacquers, and transparent sheeting.
Cellulosics
It is a hard, strong and rigid thermoplastic for household and industrial applications;
Ziegler Polyethylene (PE)
A high-pressure, low-density PE that is flexible, tough and slightly resilient thermoplastic used in construction as pond and lagoon lining, and water-vapor barriers and damp proofing.
Imperial Chemical Industries Polyethylene
One of the most important thermoplastics because of its excellent transparency and rigidity and its easy mold-ability. Non-water absorbent; Used in lighting fixture diffusers. in foam form, it has become an important thermal insulator. Also found in paint for concrete.
Polystyrene
Is a largely amorphous, rigid, tough, solvent resistant, flame-resistant thermoplastic. Used for resilient floor tile, films, pipes, and for paint lacquers and adhesives and safety glass.
Polyvinyl Chloride (PVC)
It is injection-molded to produce plates, rods, gears, and other shaped parts that advantageously replace die-cast metal parts. Used for skylights.
Polycarbonates
Tough plastic with good resistance to heat and chemical action.
Polypropylene
Exceptionally strong, elastics, abrasion resistant, easy to wash, resistant to damage from oil and many chemicals, and resilient.
Nylon
A styrenic resin with improved toughness and heat resistance.
e.g. Hard hat
Acrylonitrile Butadiene Styrene (ABS)
Hard, durable and dimensionally stable, these similar plastics are resistant to chemicals, electrical potential, and heat.
Melamine and Urea
Used in buildings for its remarkable adhesive qualities. It may also be used for special paints that are chemically resistant and caulking compounds.
Epoxy
Appear chiefly as molded electrical parts, and as the vehicle in paints, lacquers, and enamels.
Alkyds
Used for paints, baked enamels, adhesives, impregnating resins for paper and wood, and finish hardware.
Phenolics
The plastic most commonly used in large glass-fiber reinforced translucent panels that are strong, rigid, and impact-resistant. Used as laminating material and for contact adhesive.
Polyester
Used in paint coatings, and as foams, are self-adhesive.
Urethanes
Used for clear, water-repellant paints for concrete and masonry surfaces above grade.
Silicones
Can be use to replace glass in any type of windows or doors, skylights, shower enclosures, or in any area where a translucent, transparent or opaque material in a wide variety of colors are needed in the interior
Plastic Sheets
Plastic as water barrier or dampproofing material, it is generally made of polyethylene and polyvinyl.
Plastic Film
Plastic used as flotation material, thermal insulators, and shock-resistant mountings. Offer possibilities for lightweight materials of high strength.
Plastic foam
