41. In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres.
42. Vulcanisation of raw rubber makes it
43. Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation?
44. Perspex can be used as a substitute of glass. Its monomer is
45. Starting material for the production of SBR is
46. Which of the following polymers does not belong to the class of polyacrylate polymer?
47. __________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine.
48. Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its
49. Which of the following is a polymer of hexamethylene diamine and adipic acid?
50. Linear polymers are normally
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