Swiflearn > ICSE and CBSE Revision Notes > CBSE Revision Notes > CBSE Class 8 Revision Notes > CBSE Class 8 Science Revision Notes > CBSE Class 8 Science Chapter 3 Synthetic Fibres and Plastics Revision Notes

CBSE Class 8 Science Chapter 3 Synthetic Fibres and Plastics Revision Notes

Click to rate this post!
[Total: 13 Average: 4.5]

CBSE Class 8 Science Chapter 3 Synthetic Fibres and Plastics Revision Notes

 

CBSE Class 8 Science Chapter 3 Synthetic Fibres and Plastics Revision Notes are by far the best and most reliable Revision Notes for Microorganisms: Friend and Foe. These CBSE Class 8 Science Chapter 3 Synthetic Fibres and Plastics Revision Notes provided here are prepared by our subject experts at Swiflearn to help students to recall important concepts and points related to Chapter 3 Synthetic Fibres and Plastics of CBSE Class 8 and in turn, enhance their confidence.

CBSE Class 8 Science Chapter 3 Synthetic Fibres and Plastics Revision Notes will surely make your learning convenient & fun. Students can download CBSE Class 8 Maths Chapter 3 Synthetic Fibres and Plastics Revision Notes in PDF format, use them to retain their previously learned concepts, and hence, ensure better examination results for themselves.

Online Tuition

Fibres

Fibres are thin, long, and flexible and hair or thread-like structures. There are two types of fibre:-
1. Natural, 2. Man-made

1. Natural Fibres

The fibres which are obtained from natural sources such as plants are known as natural fibres.
Example:- Cotton, wool, silk, etc.

2. Man-made fibres

The fibres which are manufactured in factories by humans are known as man-made or Synthetic fibres.
Example:- Nylon, Rayon, acrylic, etc.

Synthetic Fibres:

Synthetic fibres are made by humans through the chemical synthesis in laboratories and factories.

 

Plastic

The word plastic comes from the Greek word “plastikos” which means fit for moulding. Plastic is popular because it is cheap to produce and is easy to mould and shape into the desired form.

 

Types of plastics:

 

There are two types of plastics:- 1. Thermoplastics, 2. Thermosetting polymers

1. Thermoplastics

The polymers in which the intermolecular forces of attraction are intermediary to those of elastomers and fibres are called thermoplastics. Thermoplastics can be formed into any shape by heating.

Example: Polythene, PVC, Teflon, etc.

Uses: They are used in making toys, combs, containers, etc.

 

2. Thermosetting polymers

The polymers which on heating change irreversibly into hard, rigid, and infusible
materials are called thermoplastics. Once they are moulded they cannot be changed into other forms.

Example:- Bakelite, melamine.

Uses:- They are used in making switches, handles, and utensils.

 

CBSE Class 8 Science Chapter 3 Synthetic Fibres and Plastics Revision Notes PDF

 

 

Leave a Reply

Your email address will not be published. Required fields are marked *