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. Sulphuric acid Organic peroxides Hydroflouric acid None of these Sulphuric acid Organic peroxides Hydroflouric acid None of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Thermoplastic resins usually Permanent setting resins Less brittle than thermosetting resins Remain hard as long as they are hot Can not be reclaimed from waste Permanent setting resins Less brittle than thermosetting resins Remain hard as long as they are hot Can not be reclaimed from waste ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature. Polypropylene Nylon Polyacrylonitrile Polyester Polypropylene Nylon Polyacrylonitrile Polyester ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology The inter particle forces between linear chains in nylon-66 are __________ bonds. Ionic Covalant None of these Hydrogen Ionic Covalant None of these Hydrogen ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Cation exchange resins (0.3 to 1 mm size) used in water treatment is prepared from __________ resins. Urea formaldehyde Phenol formaldehyde Melamine formaldehyde Epoxy Urea formaldehyde Phenol formaldehyde Melamine formaldehyde Epoxy 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 Saturated polyester Polyacrylonitrile Alkyd resin Polyamide Saturated polyester Polyacrylonitrile Alkyd resin Polyamide ANSWER DOWNLOAD EXAMIANS APP
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