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How do double bonds in rubber molecules ...

How do double bonds in rubber molecules influence their structure and reactivity ?

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Natural rubber is cis-polyisoprene obtained by 1, 4-polymerization of isoprene units.

This polymer has double bonds between `C_2` and `C_3` of each isoprene unit. These cis-bonds donot allow the polymer chains to come closer. Hence, intermolecular forces are quite weak. Consequently, natural rubber, i.e., cis- polyisoprene has a randomly coiled structure and hence shows elasticity.
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ICSE-POLYMERS -EXERCISE (PART-II (DESCRIPTIVE QUESTIONS )) ( VERY SHORT ANSWER QUESTIONS )
  1. What is the difference between nylon-6 and nylon-6, 6? Give their form...

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  2. What is vulcanization and when it is done?

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  3. Why does rubber become stiff on stretching?

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

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  5. Why does natural rubber need compounding?

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  6. Write the name and structure of one of the common initiators used in f...

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  7. How do double bonds in rubber molecules influence their structure and ...

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  8. Name a synthetic polymer which is an amide.

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  9. Name a synthetic polymer which is an ester.

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  10. Give the name of the polymer which is used for making non stick utensi...

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  11. Name a copolymer which is used for making non-breakable plastic crocke...

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  12. Give name and structure of monomer of polyvinyl chloride (PVC).

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  13. How is nylon 6, 6 synthesised ?

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  14. Name two synthetic rubbers.

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  15. Give one example of compolymer.

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  16. Which is the monomer unit of natural rubber?

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  17. Write the monomer units of bakelite.

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

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  19. Write the names of monomers of the following polymer :

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

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