Chemical Engineering :: Polymer Technology
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Flexible foam (for mattresses) are usually made of
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Pick out the wrong statement.
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Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C.
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Which of the following is stretched into fibres ?
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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 ?
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Maximum consumption of polymers is in
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Low density polythene as compared to high density polythene is
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Phenol formaldehyde is produced by condensation polymerisation. It is also known as
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Polymethyl methacrylate, which is an acrylic resin, is also called
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A.
Linear polymers are formed from bifunctional groups only and are normally thermoplastic.
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B.
Cross-linked branched chain polymers are either elastometric or thermosetting.
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C.
Branching in case of cross-linked polymers caused by small amount of impurities in bifunctional monomer formulation reduces its solubility and increases the softening point.
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D.
Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction.
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