Polymer Technology Antioxidants are added to rubber to protect it from the attack of light, heat & atmospheric ozone. Which of the following is an antioxident used in rubber? Magnesium Alkylated diphenyl amine Carbon Thiokol Magnesium Alkylated diphenyl amine Carbon Thiokol ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its Flexibility Tensile strength Chemical resistance All of these Flexibility Tensile strength Chemical resistance All of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the __________ fibres. Viscose rayon Acrylic Polyvinyl acetate Saturated polyester Viscose rayon Acrylic Polyvinyl acetate Saturated polyester ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Low pressure Zeigler process of polythene manufacture Produces very low density polythene Achieves an yield of 95-98% based on ethylene Employs a pressure of 30 kgf/cm² Does not use any catalyst for polymerisation Produces very low density polythene Achieves an yield of 95-98% based on ethylene Employs a pressure of 30 kgf/cm² Does not use any catalyst for polymerisation ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology __________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine. Amino Alkyd Phenolic Epoxy Amino Alkyd Phenolic Epoxy 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. Polyester Polypropylene Nylon Polyacrylonitrile Polyester Polypropylene Nylon Polyacrylonitrile ANSWER DOWNLOAD EXAMIANS APP
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