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 TRUE ANSWER : ? YOUR ANSWER : ?
__________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol). Amino resins Alkyd resins Saturated polyester Unsaturated polyester TRUE ANSWER : ? YOUR ANSWER : ?
Polymethyl methacrylate (PMMA) which is also known as perspex and is produced by bulk polymerisation of methyl methacrylate is not a __________ polymer. Linear Thermoplastic Glass like transparent Thermosetting TRUE ANSWER : ? YOUR ANSWER : ?
Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the Electrical insulation purpose Decorative laminates Strengthening of plaster of paris Tanning of leather TRUE ANSWER : ? YOUR ANSWER : ?
Thermosetting resins/polymers as compared to thermoplastic ones are Formed by addition polymerisation only Soluble in all organic solvents More brittle Easily reshaped & reused TRUE ANSWER : ? YOUR ANSWER : ?
Perspex can be used as a substitute of glass. Its monomer is Butadiene Tetrafluroethylene DMT Methyl methacrylate TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is generally not used as eord for synthetic rubber tyre casing? Nylon Cellulose None of these Dacron TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is not a condensation polymer? Polymethylmethacrylate (PMMA) None of these Bakelite Melamine polymer TRUE ANSWER : ? YOUR ANSWER : ?
__________ moulding is used for shaping of thermosetting plastics exclusively. Injection Transfer Compression Extrusion TRUE ANSWER : ? YOUR ANSWER : ?