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Home  >>  JEEMAIN and AIPMT  >>  Chemistry  >>  Polymers
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Ratio of monomers isobutylene & isoprene used to produce Butyl Rubber

$\begin{array}{1 1}(a)\;90\% : 2\%&(b)\;2\% : 98\%\\(c)\;98\% : 2\%&(d)\;70\% : 30\%\end{array}$

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Butyl Rubber is produced by polymerization of about 98% of isobutylene with about 2% of isoprene.This gives it excellent iimpermeability and the long polyisobutylene segments of its polymer chains give it good flex properties.
Hence (c) is the correct answer.
answered Mar 11, 2014 by sreemathi.v
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