Poly Ethylene Terephthalate and Acrylic

Question 1 Give the full form of PET?

Question 2 Give few properties of Poly ethylene terephthalate?

Question 3 Which synthetic fibre feels like wool and used as a substitute for wool?

Question 4 State the uses of PET?

Question 5 What is acrylic?

Question 6 Write the uses of acrylic fibres?

Question 7 Write few properties of acrylic fibre?

• NCERT Solutions Class 8 Science

Poly Ethylene Terephthalate

PET is a abbreviation of the synthetic polymer called Poly Ethylene Terephthalate.

PET can be made into a fibre or plastic.

1)PET as a plastic is very lightweight.

2)It is naturally colourless with high transparency.

3)PET is strong and impact-resistant.

4)It is used for making bottles, jars and utensils.

5)It is also used for making thin films and many other useful products.

Acrylic

Acrylic is a synthetic fibre. It is made from a chemical called acrylonitrile  by the process of polymerisation.

Properties

1)It is lightweight,soft and warm with a wool like feel.

2)It retains its shape,resists shrinkage and wrinkles.

3)It can be dyed very well.

4)Acrylic fibres are strong and durable.

5)Acrylic absorb very little water so it has quick dry quality.

6)Acrylic fibres are resistant to moths and most chemicals.

Acrylic fibres is often used as a substitute for wool. The wool obtained from natural sources is quite expensive. Acrylic offers a less expensive alternative to natural wool. So the clothes made from acrylic are relatively cheaper but more durable than those made from natural wool.

They are used for making sweater, shawls, blankets, jackets, sportswear, socks, furnishing fabrics, carpets etc.

Other Notes from Chapter 3 Synthetic Fibres and Plastics

• Synthetic Fibres
• Types of synthetic fibres
• Rayon
• Nylon
• Polyester
• Characteristics of Synthetic Fibres
• Plastics
• Types of plastics
• Properties of plastics
• Biodegradable and Non-biodegradable material
• Harmful effects of Plastics
• Steps to save environment from plastic waste