Polymer Technology In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer? PMMA Polycaprolactum PTFE Buna-S PMMA Polycaprolactum PTFE Buna-S ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of Polyesters Phenol formaldehyde resins Cross linked polystyrene Polyamides Polyesters Phenol formaldehyde resins Cross linked polystyrene Polyamides ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Thermocole (expanded polystyrene) is not used for Low temperature thermal insulation as in refrigerator and air conditioners High temperature thermal insulation in furnaces Accoustic control and ceiling for building Packing of delicate electronic gadgets Low temperature thermal insulation as in refrigerator and air conditioners High temperature thermal insulation in furnaces Accoustic control and ceiling for building Packing of delicate electronic gadgets ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology __________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine. Amino Alkyd Epoxy Phenolic Amino Alkyd Epoxy Phenolic ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Mastication of rubber means A treatment to retard its deterioration due to oxidation Its softening Depression of its freezing point Improving its curing rate A treatment to retard its deterioration due to oxidation Its softening Depression of its freezing point Improving its curing rate ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polyvinyl chloride (PVC) Can be made thermosetting by adding a plasticiser Uses either emulsion or suspension polymerisation methods Is produced by polycondensation reaction Softening temperature is 200°C Can be made thermosetting by adding a plasticiser Uses either emulsion or suspension polymerisation methods Is produced by polycondensation reaction Softening temperature is 200°C ANSWER DOWNLOAD EXAMIANS APP
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