Polymer Technology The monomer of poly vinyl chloride (PVC) is Chloroform Ethylene dichloride Ethyl chloride Chloroethene Chloroform Ethylene dichloride Ethyl chloride Chloroethene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals. None of these Sulphuric acid Organic peroxides Hydroflouric acid None of these Sulphuric acid Organic peroxides Hydroflouric acid ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Thermoplastic resins usually Remain hard as long as they are hot Permanent setting resins Can not be reclaimed from waste Less brittle than thermosetting resins Remain hard as long as they are hot Permanent setting resins Can not be reclaimed from waste Less brittle than thermosetting resins ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology 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. Polyvinyl acetate Rayon Polythene PVC Polyvinyl acetate Rayon Polythene PVC ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but Polyamide Alkyd resin Polyacrylonitrile Saturated polyester Polyamide Alkyd resin Polyacrylonitrile Saturated polyester ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to Protect rubber goods from attack by oxygen & ozone present in the atmosphere Reduce the time of vulcanisation and quantity of vulcanising agent Increase its viscosity Reduce its viscosity to permit easier processing Protect rubber goods from attack by oxygen & ozone present in the atmosphere Reduce the time of vulcanisation and quantity of vulcanising agent Increase its viscosity Reduce its viscosity to permit easier processing ANSWER DOWNLOAD EXAMIANS APP
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