Question

write any two properties of plastics​

Answer 1

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Plastics are nothing but synthetic organic high polymers. It is important to know the general outstanding properties of plastics to make best use of this an engineering material. It should also be noted that each plastic material has its own peculiar properties to suit the various uses. Hence the success of plastic as an engineering material for a particular purpose will depend upon the correct choice of the variety.

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Properties of plastic materials

Following are the general properties of plastics.

1. Strength:-

The plastics are sufficiently strong and can be used for load bearing structural members. The strength of plastics can further be increased by reinforcing them with various fibrous materials.

Plastic as structural material has not gained much popularity because of the following resins.

High cost of construction

High temperature susceptibility

Poor stiffness

Being subjected to creep under constant load

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2 Weather resistance :-

The plastics, prepared from phenolic resins, are only good in resisting weather effects. Certain plastics are seriously affected by ultraviolet light.

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Hopefully it helps

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Answer 2

Answer:

1 Plastics do not react with air and water.

2. Plastics are poor conductor of heat and electricity.

3. Plastics can be moulded into different shapes.