Question

Classify the following objects as thermoplastic and thermosetting plastics. Write
your answer in the space provided in the table.​

Answer 1

Answer:

Respiration is the process by which energy is released from food in our body. The function of respiratory system is to breathe in oxygen for respiration producing energy from food, and to breathe out carbon dioxide produced by respiration. ... Gases exchanged are oxygen and carbon dioxide.

Answer 2

Answer:

1. Telephone = Thermosetting Plastic
2. Switch = Thermosetting Plastic
3. Keyboard = Thermosetting Plastic
4. Handles of cookware = Thermosetting Plastic
5. Utensils = Thermosetting Plastic

1. Toys = Thermoplastic
2. Combs = Thermoplastic

                                                                                                                 

Explanation:

=> WHAT ARE THERMOPLASTICS ?

Such type of plastics become soft and easily bend when brought towards high temperature (like candle flame or heater) or some containers which lose their shape when hot water is poured into it are called thermoplastics.

Therefore, plastics which can be deformed easily and bent easily on heating are known as thermoplastics.

Examples :-

Polyethene, PVC

• Combs are made of PVC
• Toys are made of PVC

Hence, they are Thermoplastics.

=> WHAT ARE THERMO-SETTING PLASTICS ?

These are such types of plastics which once molded can not be softened by heating.

Examples :-

Bakelite, Melamine

• Cookware handles, Utensils/ Dinnerware, are made of Bakelite
• All Electric Appliances (like switches, keyboards, telephones) are made of Melamine.

Hence, they are Thermosetting Plastics.

                                                                                                                 

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