TLE 7 Plastics

The following statement tells about the plastic/s, except _____.

• It is the common term for a wide range of synthetic or semisynthetic organic amorphous solid materials suitable for the manufacture of industrial products.

• They are typically polymers of high molecular weight and may contain other substances to improve performance and reduce costs.

• It refers to its malleability or plasticity during manufacture that allows it to be the cast, pressed, or extruded into an enormous variety of shapes.

• It is a basic material, at par with metal, glass, wood, and paper.

• These are perennial evergreens in the true grass family that are versatile material with many useful and creative value.

Analogy. __________ : fit for molding :: Plastos : molded

It is a kind of plastic that do not soften or melt no matter how much heat is applied.

It is a kind of plastic that softens and melts if enough heat is applied.

These are molecular units that make up the backbone and side chains of polymers.

Plastic is globally important product especially if it is properly used.

• true

• false

This type of plastic can be made into a Styrofoam, signages, trays, figurines, and novelties.

This type of plastic is used to make plumbing materials, gutters, house sidings, enclosures for computers, and electronic gear.

This type of plastic is used to make toothbrush, silk stockings, parachutes, gears, bearings, bushings hood in cars, mechanical parts of cars.

What type of plastic are being used for these craft articles?

• - radios, telephones, clocks, billiard balls, lamps, buttons & jewelry -

• Parkesine-Cellulose

• Bakelite

• Polypropylene

• Polyurethane