Chemical Engineering :: Polymer Technology
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Vulcanisation of rubber
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Teflon is
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__________ is produced by polymerisation of chloroprene.
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Polyvinyl chloride (PVC) is
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Pick out the wrong statement regarding the solubility characteristics of high polymers.
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Ebonite is a/an
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Elastomers are
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Which of the following additives are added to plastics to make it impervious to X-rays ?
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Paper like thin plastic articles can be produced by
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Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
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A.
Greater the degree of cross-linking in the polymer, lesser is its solubility.
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B.
Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents.
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C.
Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent.
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D.
High molecul ar weight polymers on dissolving gives solution of very low viscosity.
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