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. None of these Sulphuric acid Hydroflouric acid Organic peroxides None of these Sulphuric acid Hydroflouric acid Organic peroxides ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is Aluminium triethyl combined with titanium tetrachloride V₂O₅ Fe Ni Aluminium triethyl combined with titanium tetrachloride V₂O₅ Fe Ni ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800? 51600 50000 50800 49200 51600 50000 50800 49200 ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Mastication of rubber means A treatment to retard its deterioration due to oxidation Depression of its freezing point Its softening Improving its curing rate A treatment to retard its deterioration due to oxidation Depression of its freezing point Its softening Improving its curing rate ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is 1 kgf/cm² (gage) and 70°C 7 kgf/cm² and 70 °C 7 kgf/cm² and 700°C 1000 kgf/cm² and 100°C 1 kgf/cm² (gage) and 70°C 7 kgf/cm² and 70 °C 7 kgf/cm² and 700°C 1000 kgf/cm² and 100°C ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Non sulphonated hard bakelites are not used for making Fountain pen barrels Formica table tops Combs Ion-exchange resins Fountain pen barrels Formica table tops Combs Ion-exchange resins ANSWER DOWNLOAD EXAMIANS APP
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