Rayon is superior to cotton in making gauge for wound treatment, because rayon
Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin.
β - glucose is the monomer of
Most of the plastics are safe to be used upto a maximum temperature of __________ °C.
Alkyd resin is a/an
Most commonly used rubber vulcanisation agent is
The major component of acrylic fibres is
Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding
Ebonite is a/an
__________ fibres are made of polyamides.
Condensation polymerisation is not involved in the manufacture of
Which of the following is a natural polyamide fibre.
__________ is a thermosetting plastic.
__________ is a natural fibre.
Pick out the wrong statement.
Which of the following polymers shows the highest anti-tacking properties ?
__________ is a homopolymer.
Which of the following polymers is used for making a non stick coating on frying pans ?
Which of the following polymers does not belong to the class of polyacrylate polymer ?
All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic
Phthalic anhydride is used
Polythene is a/an
Elastomers are
Benzoyl chloride is not used as a catalyst in the manufacture of
__________ polymer is used for making unbreakable crockery.
Thermosetting polymers as compared to thermoplastic polymers
Antioxidants are added to rubber to protect it from the attack of light, heat & atmospheric ozone. Which of the following is an antioxident used in rubber ?
Pick out the wrong statement.
Glyptal used in the manufacture of paints & lacquers is a __________ polymer.
__________ is a copolymer.
Pick out the wrong statement.
Neoprene is rendered non-inflammable, because of
Plastic tubes & pipes are generally made by __________ moulding.
Tyres are made by
Which of the following is generally not drawn into fibre ?
Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E. (poly chloro tetra flouro ethylene). It is also called
Synthetic polymer produced by using terephthalic acid and ethylene glycol is
Which of the following additives are added to plastics to make it impervious to X-rays ?
The conversion of caprolactum in the above case is about __________ percent.
Flexible plastic pipes are made of
The monomer of natural rubber is
Maximum consumption of polymers is in
Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C.
Addition of stabiliser during PVC manufacture is done to
Polycaprolactum is nothing but
Perspex can be used as a substitute of glass. Its monomer is
Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is
Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its
Bakelite is a/an
Catalyst used in the production of high density polythene by low pressure Ziegler process is