Polymer Technology Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their Resistance to heat Magnitude of intermolecular forces Molecular sizes Polymerisation mechanism Resistance to heat Magnitude of intermolecular forces Molecular sizes Polymerisation mechanism ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Flexible foam (for mattresses) are usually made of Silicone rubber Polyamides Polyurethanes PVC Silicone rubber Polyamides Polyurethanes PVC ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its Flexibility Tensile strength Chemical resistance All of these Flexibility Tensile strength Chemical resistance All of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser? Stearic acid estors Tricresyl phosphate Esters of phthalic acid Ethylene glycol Stearic acid estors Tricresyl phosphate Esters of phthalic acid Ethylene glycol ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Low density polythene as compared to high density polythene is Chemically inert More flexible Harder Tougher Chemically inert More flexible Harder Tougher ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology __________ of SBR is adversely affected, if more quantity of styrene is added to butadiene during its co-polymerisation to produce SBR. Strength Freezing point Resilience Percent elongation Strength Freezing point Resilience Percent elongation ANSWER DOWNLOAD EXAMIANS APP
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