____________ is a copolymer?
____________ is a copolymer?
A. Styrene butadiene rubber (SBR)
B. Neoprene
C. PVC
D. None of these
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Cross linked polymers formed from bi-and trifunctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer ______________ properties?
Cross linked polymers formed from bi-and trifunctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer ______________ properties?A. Thermoplastic
B. Thermosetting
C. Elastometric
D. BrittlenessAddition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by _______________, which decompose to give free radicals?
Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by _______________, which decompose to give free radicals?A. Organic peroxides
B. Sulphuric acid
C. Hydrofluoric acid
D. None of theseSynthetic polymer produced by using terephthalic acid and ethylene glycol is _________________?
Synthetic polymer produced by using terephthalic acid and ethylene glycol is _________________?A. Terylene
B. Nylon-66
C. PVC
D. PolystyreneThermosetting polymers as compared to thermoplastic polymers_____________________?
Thermosetting polymers as compared to thermoplastic polymers_____________________?A. Are formed by addition polymerisation
B. Have three dimensional structure
C. Have linear structure
D. None of theseNeoprene is a___________________?
Neoprene is a___________________?A. Monomer
B. Synthetic rubber
C. Polyester
D. None of theseBakelite (phenol-formaldehyde) resin cannot be used as________________?
Bakelite (phenol-formaldehyde) resin cannot be used as________________?A. Decorative paint
B. Decorative laminates
C. Electrical insulation
D. Glass reinforced plastics