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. Sulphuric acid None of these Hydroflouric acid Organic peroxides Sulphuric acid None of these Hydroflouric acid Organic peroxides ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Nylon-66 compared to nylon-6 has More abrasion resistant properties Higher hardness Lower melting point All of these More abrasion resistant properties Higher hardness Lower melting point All of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Zeigler - Natta catalyst (AlR₃ - AlCl₃) is used in the polymerisation of Styrene Propylene Vinyl acetate Vinyl chloride Styrene Propylene Vinyl acetate Vinyl chloride ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Tubeless tyres are made of __________ rubber, which is a co-polymer of isoprene & isobutylene. Neoprene Silicone Nitrile Butyl Neoprene Silicone Nitrile Butyl ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Cross linked polymers formed from bi-and trifuctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer __________ properties. Elastometric Thermosetting Thermoplastic Brittleness Elastometric Thermosetting Thermoplastic Brittleness ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer? Nylon-6 Bakelite (phenol formaldehyde) Polythene Polyester Nylon-6 Bakelite (phenol formaldehyde) Polythene Polyester ANSWER DOWNLOAD EXAMIANS APP
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