Polymer Technology Thermosetting resins/polymers as compared to thermoplastic ones are Soluble in all organic solvents Easily reshaped & reused Formed by addition polymerisation only More brittle Soluble in all organic solvents Easily reshaped & reused Formed by addition polymerisation only More brittle ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology __________ practically possess no elasticity. Spandex fibre Polysulphide rubber Epoxy resin Vulcanite or ebonite Spandex fibre Polysulphide rubber Epoxy resin Vulcanite or ebonite ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Thiokol is nothing but Exponded polystyrene Polyamide fibre Engineering plastic Polysulphide rubber Exponded polystyrene Polyamide fibre Engineering plastic Polysulphide rubber ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its Strength Elasticity Weathering characteristics Plasticity Strength Elasticity Weathering characteristics Plasticity ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at 1:3 2:1 3:1 1:2 1:3 2:1 3:1 1:2 ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Synthetic rubber Is brittle at low temperature Is softer at higher temperature Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases Deforms, if stretched to double of its original dimension Is brittle at low temperature Is softer at higher temperature Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases Deforms, if stretched to double of its original dimension ANSWER DOWNLOAD EXAMIANS APP
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