Polymer Technology Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their Polymerisation mechanism Magnitude of intermolecular forces Molecular sizes Resistance to heat Polymerisation mechanism Magnitude of intermolecular forces Molecular sizes Resistance to heat ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Thermocole is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten Polyurathane Either B or C Saturated polyester Polystyrene Polyurathane Either B or C Saturated polyester Polystyrene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent. 1000-1500 1500-2000 2000-2500 1-1000 1000-1500 1500-2000 2000-2500 1-1000 ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Thermosetting polymers as compared to thermoplastic polymers Have linear structure Are formed by addition polymerisation Have three dimensional structure None of these Have linear structure Are formed by addition polymerisation Have three dimensional structure None of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Most commonly used rubber vulcanisation agent is Platinum Bromine Sulphur Alumina Platinum Bromine Sulphur Alumina ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following rubbers has the widest service temperature range (-75 to 275°C) ? Nitrile rubber Butyl rubber Silicone rubber Silicon rubber Nitrile rubber Butyl rubber Silicone rubber Silicon rubber ANSWER DOWNLOAD EXAMIANS APP
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