Question

2. Give the characteristics and important use of the following:
a) Polythene
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Answer 1

most common plastic is polythene.

Melting point: 115–135 °C (239–275 °F; 388–408 K)

Density: 0.88–0.96 g/cm3

use is in packaging (plastic bags, plastic films, geomembranes )

Answer 2

Since its conception in the 1950's the primary use of polythene has been in packaging (plastic bags, plastics films, membranes, containers, bottles, etc.)

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The many uses of Polythene

Dustbin liners.

Hoses/tubes.

Insulation.

Plastic Bottles.

Protective packaging.

Door mat for wet feet.

Tabards.

Kids play mats.

characteristics

The two most common types of polyethylene compounds are high density polyethylene (HDPE) and low density polyethylene (LDPE). Both compounds have very different physical properties. For example, while LDPE compounds have a melting point of 115º C, HDPE compounds melt at 135º C. LDPE is more flexible than HDPE, but when it comes to strength, HDPE is the winner. Although we know what a general polyethylene looks like, both HDPE and LDPE have their own unique structures,

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