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प्रश्न
Attempt the following:
Explain the vulcanisation of rubber. Which vulcanizing agents are used for the following synthetic rubber?
a. Neoprene
b. Buna-N
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उत्तर
The process by which a network of cross-links is introduced into an elastomer is called vulcanization. The profound effect of vulcanization enhances the properties like tensile strength, stiffness, elasticity, toughness; etc. of natural rubber.
a. Neoprene: MgO is used to vulcanize neoprene.
b. Buna-N: Sulfur is used to vulcanize Buna-N.
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संबंधित प्रश्न
Based on molecular forces, what type of polymer is neoprene?
The Zieglar-Natta catalyst is used in the preparation of _______.
(A) LDPE
(B) PHBV
(C) PAN
(D) HDPE
Write the structure of melamine.
Write the structures of the monomers used for getting the following polymers
Melamine – formaldehyde polymer
Choose the correct option from the given alternatives.
Which of the following is made up of polyamides?
Answer the following in one sentence.
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\[\ce{H2N -(CH2)6 - NH2 + HOOC - (CH2)4 - COOH ->[N2][533 K]}\]'B'
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Write the reaction of the formation of Nylon 6.
Answer the following.
Name the polymer type in which following linkage is present.
\[\begin{array}{cc}\ce{- C - O -}\\||\phantom{.....}\\
\ce{O\phantom{.....}}\end{array}\]
Draw the structures of polymers formed from the following monomers
\[\ce{n HOOC–R–COOH + n HO–R'–OH}\]
Name and draw structure of the repeating unit in natural rubber.
Identify condensation polymers and addition polymers from the following.
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Write chemical reaction for preparation of the following.
Buna-S
Write the name of one example of each polymer in which following repeating units.
\[\begin{array}{cc}
\ce{(-CF2-CF2-), -[NH-(CH2)5-CO] -, -(CH2-CH-), (-CH2-CH2-)}\\
\phantom{............................}|\\
\phantom{..............................}\ce{CN}
\end{array}\]
Which of the following is used as a substitute for wool?
Which of the following polymer is used in paints?
Identify the CORRECT statement regarding the following polymer.
\[\begin{array}{cc}
\phantom{....}\ce{O}\phantom{............}\ce{O}\phantom{...................}\ce{H}\phantom{.....}\\
\phantom{....}||\phantom{.............}||\phantom{...................}|\phantom{......}\\
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\end{array}\]
The INCORRECT match for the polymer with its application is:
Identify the INCORRECT match.
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\[\ce{{n} CH2 = CH2 ->[333 K - 343 K][6 - 7 atm, catalyst] X}\]
Which of the following is CORRECT about polymer 'X'?
Which of the following polymers is obtained from chloroprene?
Novolac is obtained from ____________.
Which of the following catalysts is used in preparation of terylene?
Which among the following catalysts is used in the preparation of dacron?
Identify the catalyst used in the manufacture of high density polythene.
Which among the following monomers is used to prepare Teflon?
Which of the following monomers is used in the manufacture of Neoprene rubber?
Which among the following polymers is an example of addition polymer?
Which of the following polymer is used to make blankets?
Which of the following is not a semisynthetic polymer?
Name the polymers used in laminated sheets and give the name of monomeric units involved in its formation.
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Identify the monomer used to prepare neoprene.
The monomer of natural rubber is ______.
Answer the following.
Name and draw structure of the repeating unit in natural rubber.
Answer the following.
Name and draw structure of the repeating unit in natural rubber.
Name and draw the structure of the repeating unit in natural rubber.
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Write the preparation of viscose rayon.
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| Polymer | Monomer | ||
| (i) | Teflon | (a) | CH2 = CH2 |
| (ii) | PVC | (b) | CF2 = CF2 |
| (iii) | Natural rubber | (c) | Isoprene |
| (iv) | Polythene | (d) | H2C=CHCl |
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Name and draw the structure of the repeating unit in natural rubber.
Write the structure of isoprene and the polymer obtained from it.
Write the structure of isoprene and the polymer obtained from it.
Write the structure of isoprene and the polymer obtained from it.
Write the structure of isoprene and the polymer obtained from it.
Name and draw structure of the repeating unit in natural rubber.
Name and draw the structure of the repeating unit in natural rubber.
Identify polyamide polymer from following.
Which from following statements is NOT true regarding neoprene?
