A. Remain hard as long as they are hot
B. Cannot be reclaimed from waste
C. Permanent setting resins
D. Less brittle than thermosetting resins
Polymer Technology
Polymer Technology
A. Thermoplastic
B. Thermosetting
C. Elastometric
D. Brittleness
A. Employs a pressure of 30 kgf/cm2
B. Achieves an yield of 95-98% based on ethylene
C. Produces very low density polythene
D. Does not use any catalyst for polymerisation
A. Vulcanite or ebonite
B. Spandex fibre
C. Polysulphide rubber
D. Epoxy resin
A. Fibrous
B. Plastic
C. Resinous
D. Rubbery
A. Starch
B. Cellulose
C. Proteins
D. Nucleic acids
A. Epoxy
B. Amino
C. Alkyd
D. Phenolic
A. Propylene
B. Phenol & formaldehyde
C. Phenol & acetaldehyde
D. Urea & formaldehyde
A. Ductile
B. Brittle
C. Malleable
D. None of these
A. For the manufacture of styrene, the major raw materials are benzene and ethylene
B. One important copolymer of styrene is SBR, which is widely used in the manufacture of
automobile tyres
C. Manufacture of phenol by chloroben-zene-eaustic process involves. The chlorination of benzene, causticisation and hydrolysis
D. Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available