Dacron is a _____________________________?

Byadmin March 7, 2019August 25, 2021

Dacron is a _____________________________?

A. Condensation polymerisation product of Hexamethylene diamine and adipic acid
B. Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol
C. Thermosetting material
D. None of these

Polymer Technology

Alkyd resin e.g., glyptal resin formed by Phthalic anhydride and glycerine is not used_______________?

Alkyd resin e.g., glyptal resin formed by Phthalic anhydride and glycerine is not used_______________?

A. For surface coating of automobiles & air crafts
B. For fibre making
C. As plasticiser for PVC & nitrocellulose
D. For film forming materials

Read More Alkyd resin e.g., glyptal resin formed by Phthalic anhydride and glycerine is not used_______________?
Polymer Technology

Plastic articles are normally produced by _____________ moulding?

Plastic articles are normally produced by _____________ moulding?

A. Green sand
B. Injection
C. Shell
D. Dry sand

Read More Plastic articles are normally produced by _____________ moulding?
Polymer Technology

Most of the fibre forming polymers are crystalline in nature, one of the exceptions being ______________ which is amorphous in nature?

Most of the fibre forming polymers are crystalline in nature, one of the exceptions being ______________ which is amorphous in nature?

A. Nylon
B. Polyacrylonitrile
C. Polypropylene
D. Polyester

Read More Most of the fibre forming polymers are crystalline in nature, one of the exceptions being ______________ which is amorphous in nature?
Polymer Technology

Tyres are made by___________________?

Tyres are made by___________________?

A. Injection moulding
B. Extrusion
C. Rotational moulding
D. Compression moulding

Read More Tyres are made by___________________?
Polymer Technology

Styrene which is a monomer for the production of polystyrene, is commercially produced by the __________________?

Styrene which is a monomer for the production of polystyrene, is commercially produced by the __________________?

A. Catalytic dehydrogenation of ethyl benzene
B. Dehydration of ethyl alcohol followed by hydrogenation
C. Reacting ethylene oxide with acetaldehyde
D. Fermentation of starch

Read More Styrene which is a monomer for the production of polystyrene, is commercially produced by the __________________?
Polymer Technology

Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by _______________, which decompose to give free radicals?

Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by _______________, which decompose to give free radicals?

A. Organic peroxides
B. Sulphuric acid
C. Hydrofluoric acid
D. None of these

Read More Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by _______________, which decompose to give free radicals?

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