Polymer Technology Thermocole is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten Saturated polyester Polyurathane Polystyrene Either B or C Saturated polyester Polyurathane Polystyrene Either B or C ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Synthetic rubber Is brittle at low temperature Deforms, if stretched to double of its original dimension Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases Is softer at higher temperature Is brittle at low temperature Deforms, if stretched to double of its original dimension Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases Is softer at higher temperature ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polymethyl methacrylate (PMMA) which is also known as perspex and is produced by bulk polymerisation of methyl methacrylate is not a __________ polymer. Thermoplastic Linear Glass like transparent Thermosetting Thermoplastic Linear Glass like transparent Thermosetting ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Low density polythene as compared to high density polythene is Chemically inert Tougher More flexible Harder Chemically inert Tougher More flexible Harder ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following is a copolymer? PVC Polythene Teflon Bakelite PVC Polythene Teflon Bakelite ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to 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 Reduce its viscosity to permit easier processing ANSWER DOWNLOAD EXAMIANS APP
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