Polymer Technology __________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine. Amino Phenolic Alkyd Epoxy Amino Phenolic Alkyd Epoxy ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Diphenylamine is added to rubber to Protect it from deterioration on exposure to air Make it thermosetting Valcanise it Make it non-inflammable Protect it from deterioration on exposure to air Make it thermosetting Valcanise it Make it non-inflammable ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Buna-S is a __________ material. Fibrous Plastic Resinous Rubbery Fibrous Plastic Resinous Rubbery 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) Polyester Polythene Nylon-6 Bakelite (phenol formaldehyde) Polyester Polythene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is Polypropylene PVC Polybutadiene Terylene Polypropylene PVC Polybutadiene Terylene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polyvinyl chloride (PVC) Softening temperature is 200°C Can be made thermosetting by adding a plasticiser Is produced by polycondensation reaction Uses either emulsion or suspension polymerisation methods Softening temperature is 200°C Can be made thermosetting by adding a plasticiser Is produced by polycondensation reaction Uses either emulsion or suspension polymerisation methods ANSWER DOWNLOAD EXAMIANS APP
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