Cross linked polymers are__________________?
Cross linked polymers are__________________?
A. Thermoplastic
B. Thermosetting
C. Either A. or B.
D. Fibres only
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Orlan fibre which is used as a wool substitute is __________________?
Orlan fibre which is used as a wool substitute is __________________?A. An amorphous polymer
B. A natural polymeric fibre
C. Polyacrylonitrile
D. Poly-methyl-methacrylate (PMMA)Tyres are made by___________________?
Tyres are made by___________________?A. Injection moulding
B. Extrusion
C. Rotational moulding
D. Compression mouldingThe organic acid monomer in nylon-66 is __________________?
The organic acid monomer in nylon-66 is __________________?A. Sebacic acid
B. Terephthalic acid
C. Adipic acid
D. Benzoic acidAddition 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 thesePhenol formaldehyde __________________?
Phenol formaldehyde __________________?A. Employs addition polymerisation
B. Employs condensation polymerisation
C. Is a monomer
D. Is an abrasive materialWhich of the following is the most important rubber compounding ingredient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ?
Which of the following is the most important rubber compounding ingredient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ?A. Phosphorous
B. Carbon black
C. e oil
D. Rosin