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 A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of Siloxane elastomers Vinyl polymers Urea-formaldehyde resins Polyamides Siloxane elastomers Vinyl polymers Urea-formaldehyde resins Polyamides ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Main constituent of natural rubber is Polyisoprene Polystyrene Polybutadiene Poly chloroprene Polyisoprene Polystyrene Polybutadiene Poly chloroprene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following natural bio polymers are formed as a result of polymerisation of amino-acids? Cellulose Nucleic acids Proteins Starch Cellulose Nucleic acids Proteins Starch ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Low pressure Zeigler process of polythene manufacture Achieves an yield of 95-98% based on ethylene Produces very low density polythene Employs a pressure of 30 kgf/cm² Does not use any catalyst for polymerisation Achieves an yield of 95-98% based on ethylene Produces very low density polythene Employs a pressure of 30 kgf/cm² Does not use any catalyst for polymerisation ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Valcunisation of rubber decreases its Tackiness Working temperature range Resistance to organic solvents Tensile strength Tackiness Working temperature range Resistance to organic solvents Tensile strength ANSWER DOWNLOAD EXAMIANS APP
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