Polymer Technology Zeigler - Natta catalyst (AlR₃ - AlCl₃) is used in the polymerisation of Propylene Vinyl acetate Styrene Vinyl chloride Propylene Vinyl acetate Styrene Vinyl chloride ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Flexible foam (for mattresses) are usually made of Polyurethanes PVC Polyamides Silicone rubber Polyurethanes PVC Polyamides Silicone rubber ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following polymers belong to the class of formaldehyde resin? Melamine resins Teflon Dacron None of these Melamine resins Teflon Dacron None of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are 250°C and 10 kgf/cm² 50°C and 1 kgf/cm² 250°C and 1 kgf/cm² 50°C and 3 - 4 kg/cm² 250°C and 10 kgf/cm² 50°C and 1 kgf/cm² 250°C and 1 kgf/cm² 50°C and 3 - 4 kg/cm² ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following is not a natural polymer? Polysaccharides Nucleic acids e.g. RNA and DNA Polyurethane Polyisoprene Polysaccharides Nucleic acids e.g. RNA and DNA Polyurethane Polyisoprene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Low pressure Zeigler process of polythene manufacture Does not use any catalyst for polymerisation Achieves an yield of 95-98% based on ethylene Produces very low density polythene Employs a pressure of 30 kgf/cm² Does not use any catalyst for polymerisation Achieves an yield of 95-98% based on ethylene Produces very low density polythene Employs a pressure of 30 kgf/cm² ANSWER DOWNLOAD EXAMIANS APP
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