Polymer Technology Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to Reduce its viscosity to permit easier processing Increase its viscosity Protect rubber goods from attack by oxygen & ozone present in the atmosphere Reduce the time of vulcanisation and quantity of vulcanising agent Reduce its viscosity to permit easier processing Increase its viscosity Protect rubber goods from attack by oxygen & ozone present in the atmosphere Reduce the time of vulcanisation and quantity of vulcanising agent ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is 7 kgf/cm² and 700°C 1000 kgf/cm² and 100°C 7 kgf/cm² and 70 °C 1 kgf/cm² (gage) and 70°C 7 kgf/cm² and 700°C 1000 kgf/cm² and 100°C 7 kgf/cm² and 70 °C 1 kgf/cm² (gage) and 70°C ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following rubbers has the widest service temperature range (-75 to 275°C) ? Silicon rubber Butyl rubber Silicone rubber Nitrile rubber Silicon rubber Butyl rubber Silicone rubber Nitrile rubber ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Diphenylamine is added to rubber to Protect it from deterioration on exposure to air Valcanise it Make it thermosetting Make it non-inflammable Protect it from deterioration on exposure to air Valcanise it Make it thermosetting Make it non-inflammable ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology A copolymer is formed by the combination of two or more monomer molecules None of these Of the same monomer by elimination of small molecules of water With the elimination of small amount of water In a chain without the elimination of water None of these Of the same monomer by elimination of small molecules of water With the elimination of small amount of water In a chain without the elimination of water ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Buna-S is a __________ material. Resinous Fibrous Rubbery Plastic Resinous Fibrous Rubbery Plastic ANSWER DOWNLOAD EXAMIANS APP
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