Polymer Technology Polyvinyl chloride (PVC) Softening temperature is 200°C Is produced by polycondensation reaction Uses either emulsion or suspension polymerisation methods Can be made thermosetting by adding a plasticiser Softening temperature is 200°C Is produced by polycondensation reaction Uses either emulsion or suspension polymerisation methods Can be made thermosetting by adding a plasticiser ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Molecular weight of polymers are in the range of 10⁷-10⁹ 10 to 10³ 10⁹-10¹¹ 10²-10⁷ 10⁷-10⁹ 10 to 10³ 10⁹-10¹¹ 10²-10⁷ ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres. Acrylic Polypropylene Polyester Nylon 6:6 Acrylic Polypropylene Polyester Nylon 6:6 ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology The inter particle forces between linear chains in nylon-66 are __________ bonds. Hydrogen Covalant Ionic None of these Hydrogen Covalant Ionic None of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Bakelite (phenol-formaldehyde) resin can not be used as Glass reinforced plastics Electrical insulation Decorative laminates Decorative paint Glass reinforced plastics Electrical insulation Decorative laminates Decorative paint ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Styrene butadiene rubber (SBR) as compared to natural rubber has Poorer resistance All of these Greater amount of heat build up heavy loading Poor tensile strength Poorer resistance All of these Greater amount of heat build up heavy loading Poor tensile strength ANSWER DOWNLOAD EXAMIANS APP
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