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 TRUE ANSWER : ? YOUR ANSWER : ?
Polycaprolactum (Nylon - 6) is produced by the condensation polymerisation of caprolactum at 240-280°C in which the conversion of caprolactum is about __________ percent. 75 99 90 50 TRUE ANSWER : ? YOUR ANSWER : ?
Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces Dacron Polyester Nylon-6 PVC TRUE ANSWER : ? YOUR ANSWER : ?
Benzoyl chloride is not used as a catalyst in the manufacture of Polyvinyl acetate Polystyrene Polyvinyl chloride-co-vinylacetate Polypropylene TRUE ANSWER : ? YOUR ANSWER : ?
__________ moulding is used for shaping of thermosetting plastics exclusively. Extrusion Transfer Compression Injection TRUE ANSWER : ? YOUR ANSWER : ?
In nylon-6, the number 6 represents the total number of Carbon atoms in the linear polymer chain Hydrogen atoms in the ring Carbon atoms in the ring Nitrogen atoms in the ring TRUE ANSWER : ? YOUR ANSWER : ?
Orlan fibre which is used as a wool sub stitute is Polymethylmethacrylate (PMMA) An amorphous polymer A natural polymeric fibre Polyacrylonitrile TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is generally not drawn into fibre? Unsaturated polyesters Polyamide Saturated polyesters Polyacrylonitrile TRUE ANSWER : ? YOUR ANSWER : ?
Orion is Obtained by polymerising vinyl cyanide A copolymer A condensation polymer All of these TRUE ANSWER : ? YOUR ANSWER : ?
Softening point of high density polythene is about __________ °C. 85 205 135 165 TRUE ANSWER : ? YOUR ANSWER : ?