Polymer Technology Contact lenses for eyes are made of perspex, which is nothing but Unsaturated polyester Polystyrene Polymethylmethacrylate Polypropylene Unsaturated polyester Polystyrene Polymethylmethacrylate Polypropylene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals. Organic peroxides Hydroflouric acid Sulphuric acid None of these Organic peroxides Hydroflouric acid Sulphuric acid None of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology The major component of acrylic fibres is Polyolefins Polyamides Polyesters Polyacrylonitrile Polyolefins Polyamides Polyesters Polyacrylonitrile ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher Densities Hardness, rigidity & brittleness Melting point Tensile strength Densities Hardness, rigidity & brittleness Melting point Tensile strength ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Styrene butadiene rubber (SBR) as compared to natural rubber has Poorer resistance Greater amount of heat build up heavy loading All of these Poor tensile strength Poorer resistance Greater amount of heat build up heavy loading All of these Poor tensile strength ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Main constituent of cotton fibre is Gelatine Lignin Cellulose Starch Gelatine Lignin Cellulose Starch ANSWER DOWNLOAD EXAMIANS APP
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