Polymer Technology Density of low density polythene is about __________ gm/c.c. 0.91 0.81 0.38 0.56 0.91 0.81 0.38 0.56 ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following is not a natural polymer? Polysaccharides Polyisoprene Polyurethane Nucleic acids e.g. RNA and DNA Polysaccharides Polyisoprene Polyurethane Nucleic acids e.g. RNA and DNA ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their Polymerisation mechanism Molecular sizes Magnitude of intermolecular forces Resistance to heat Polymerisation mechanism Molecular sizes Magnitude of intermolecular forces Resistance to heat ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Dacron (or terylene) fibres as compared to nylon fibres have Poorer resistance to alkalis Poorer dyeability All of these Better heat & acid resistant properties Poorer resistance to alkalis Poorer dyeability All of these Better heat & acid resistant properties ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Celluloid is Cellulose acetate butyrate Cellulose acetate Regenerated cellulose Cellulose nitrate Cellulose acetate butyrate Cellulose acetate Regenerated cellulose Cellulose nitrate 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. Acrylic Nylon 6:6 Polyester Polypropylene Acrylic Nylon 6:6 Polyester Polypropylene ANSWER DOWNLOAD EXAMIANS APP
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