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Define thermoplastics and thermosetting ...

Define thermoplastics and thermosetting polymers with two examples of each.

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Thermoplastics are linear polymers which are hard at room temperature. Such polymers are hard at room temperature and on heating they become soft or fluid like and then can be moulded in any shape. They show reversible changes when heated and cooled. Thus, they can be used again and again. Two common examples of thermoplastics are polythene and polystyrene.
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ICSE-POLYMERS -EXERCISE (PART-II (DESCRIPTIVE QUESTIONS )) ( VERY SHORT ANSWER QUESTIONS )
  1. Why nylon makes good fibres ?

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  2. What does the part'6,6' mean in the name nylon-6,6 ?

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  3. Define thermoplastics and thermosetting polymers with two examples of ...

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  4. Explain the term thermosetting plastics and give two examples.

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  5. Write the monomers used for getting the following polymers: Polyvin...

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  6. Write the monomers used for getting the following polymers: Teflon

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  7. Write the monomers used for getting the following polymers: Bakelit...

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  8. Write the names of the monomers of the following polymers: [--N over...

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  9. Write the names of the monomers of the following polymers: [--overse...

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  10. Write the names of the monomers of the following polymers: [CF2 - CF...

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  11. What is a plasticizer?

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  12. Why plasticizers are used during manufacturing of plastics?

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  13. What is gutta-percha?

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  14. What are the monomers of SBR.

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  15. Name the monomers of nylon-2 or nylon-6.

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  16. What is the difference between nylon-6 and nylon-6, 6? Give their form...

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  17. What is vulcanization and when it is done?

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  18. Why does rubber become stiff on stretching?

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  19. Why do all simple organic molecules not produce polymers?

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  20. Why does natural rubber need compounding?

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