Polymer Technology Styrene butadiene rubber (SBR) as compared to natural rubber has Poorer resistance Greater amount of heat build up heavy loading Poor tensile strength All of these Poorer resistance Greater amount of heat build up heavy loading Poor tensile strength All of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology The synthetic fibres produced from __________ are known as rayon. Cellulose Lignin Ethylene glycol Polyamides Cellulose Lignin Ethylene glycol Polyamides ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance. Polyurathane Polycarbonate Polysulphone Polyester Polyurathane Polycarbonate Polysulphone Polyester ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Commercial production of polypropylene employs __________ polymerisation. Bulk Solution Suspension Emulsion Bulk Solution Suspension Emulsion ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres. Polyester Polypropylene Acrylic Nylon 6:6 Polyester Polypropylene Acrylic Nylon 6:6 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 Organic peroxides Sulphuric acid Hydroflouric acid None of these Organic peroxides Sulphuric acid Hydroflouric acid ANSWER DOWNLOAD EXAMIANS APP
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