Polymer Technology Antioxidants are added to rubber to protect it from the attack of light, heat & atmospheric ozone. Which of the following is an antioxident used in rubber? Thiokol Carbon Magnesium Alkylated diphenyl amine Thiokol Carbon Magnesium Alkylated diphenyl amine ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically Polymethyl methacrylate (PMMA) Polytetraflouroethylene(PTFE) Polycarbonates Phenolic resins Polymethyl methacrylate (PMMA) Polytetraflouroethylene(PTFE) Polycarbonates Phenolic resins ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is Chlorophrene Chloroethane Isoprene None of these Chlorophrene Chloroethane Isoprene None of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres. Polythene Rayon Polyvinyl acetate PVC Polythene Rayon Polyvinyl acetate PVC ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres. Nylon 6:6 Polypropylene Acrylic Polyester Nylon 6:6 Polypropylene Acrylic Polyester ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polypropylene compared to polythene is Stronger Harder All of these Lighter Stronger Harder All of these Lighter ANSWER DOWNLOAD EXAMIANS APP
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