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Write Chemical Reactions to Prepare the Following Polymers : - Chemistry

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प्रश्न

Write chemical reaction to prepare the Dextron polymer:
Dextron

संक्षेप में उत्तर

उत्तर

\[\begin{array}{cc}
\phantom{..}\ce{OH} \phantom{.............}\ce{OH}\phantom{...........}\\
\phantom{}|\phantom{................}|\phantom{...........}\\
\ce{\text{n}CH3\underset{\text{Lactic acid}}{-CH-}COOH + \text{n}\underset{\text{Glycolic acid}}{CH2-COOH}->[-H2O]}\end{array}\begin{array}{cc}
\phantom{...............}\ce{O}\phantom{............}\ce{O}\phantom{...........}\\
\phantom{...............}||\phantom{............}||\phantom{...........}\\
\ce{[-O-CH-C-O-CH2-C-O-]\text{n}}\\
|\phantom{...................}\\
\ce{\underset{\phantom{.......................................}\text{Dextron}}{CH3}\phantom{................}}
\end{array}\]

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2018-2019 (February) Set 1

संबंधित प्रश्न

How are polythene and neoprene prepared?


Write the molecular formula and structural formula of BHA and BHT.

 


What is the role of t-butyl peroxide in the polymerization of ethene?


Which of the following is a natural polymer ? Buna-S, Proteins, PVC


Write the free radical mechanism for the polymerisation of ethene.


Which of the following statements is not true about low-density polythene?


Out of chain growth polymerisation and step growth polymerisation, in which type will you place the following.


What is the role of benzoyl peroxide in addition polymerisation of alkenes? Explain its mode of action with the help of an example.


Why should the monomers used in addition polymerisation through free radical pathway be very pure?


Match the polymer of column I with correct monomer of column II.

Column I Column II
(i) High density polythene (a) Isoprene
(ii) Neoprene (b) Tetrafluoroethene
(iii) Natural rubber (c) Chloroprene
(iv) Teflon (d) Acrylonitrile
(v) Acrilan (e) Ethene

Match the polymers given in Column I with their chemical names given in Column II.

Column I Column II
(i) Nylon 6 (a) Polyvinyl chloride
(ii) PVC (b) Polyacrylonitrile
(iii) Acrilan (c) Polycaprolactum
(iv) Natural rubber (d) Low-density polythene
(v) LDP (e) cis-polyisoprene

Match the polymers given in Column I with the preferred mode of polymerisation followed by their monomers.

Column I Column II
(i) Nylon-6,6 (a) Free radical polymerisation
(ii) PVC (b) Ziegler-Natta polymerisation or coordination polymerisation
(iii) HDP (c) Anionic polymerisation
  (d) Condensation polymerisation

Assertion: Olefinic monomers undergo addition polymerisation.

Reason: Polymerisation of vinyl chloride is initiated by peroxides/ persulphates.


Low density polythene and high density polythene, both are polymers of ethene but there is marked difference in their properties. Explain.


Which one of the following can be used as monomer in a polymerisation reaction?


The Ziegler Natta catalyst are


Which of the following is chain-growth polymer?


Which one of the following polymers are prepared by addition polymerisation?


Which one of the following polymers is prepared by addition polymerisation? 


Orlon fibres are made up of ______.


\[\ce{X + C + Cl2 ->[High temperature][of about 1000 K] Y + CO}\];

\[\ce{Y + 2H2O -> Z + 2HCl}\]

Compound Y is found in polymeric chain structure and is an electron-deficient Molecule. Y must be:


Which of the following statements about low density polythene is false?


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