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प्रश्न
How is the following resin intermediate prepared and which polymer is formed by this monomer unit?
(Resin intermediate)
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उत्तर
Melamine and formaldehyde polymer is formed by the condensation polymerisation of melamine and formaldehyde.
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संबंधित प्रश्न
Write the structures of monomers used the following polymers:
Glyptal
Which of the following polymers have vinylic monomer units?
(i) Acrilan
(ii) Polystyrene
(iii) Nylon
(iv) Teflon
Match the polymers given in Column I with their commercial names given in Column II.
| Column I | Column II |
| (i) Polyester of glycol and phthalic acid | (a) Novolac |
| (ii) Copolymer of 1, 3-butadiene and styrene | (b) Glyptal |
| (iii) Phenol and formaldehyde resin | (c) Buna-S |
| (iv) Polyester of glycol and terephthalic acid | (d) Buna-N |
| (v) Copolymer of 1, 3-butadiene and acrylonitrile | (e) Dacron |
Which of the following polymers soften on heating and harden on cooling? What are the polymers with this property collectively called? What are the structural similarities between such polymers? Bakelite, urea-formaldehyde resin, polythene, polyvinyls, polystyrene.
Which of the following is used in paints?
Reaction of HBr with propene in the presence of peroxide gives
Styrene at room temperature:-
Glyptal is a :-
Which of the following is not polyamide?
The commercial name of polymethyl (methacrylate) is ______.
Soft drinks and baby feeding bottles are generally made up of ______.
Identify X and Y in the following reaction:
Match List - I with List - II.
| List I (Polymer) |
List II (Used in) |
||
| (A) | Bakelite | (I) | Radio and television Cabinets |
| (B) | Glyptal | (II) | Electrical switches |
| (C) | PVC | (III) | Paints and Lacquers |
| (D) | Polystyrene | (IV) | Water Pipes |
Choose the correct answer from the options given below:
