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  4. The monomer of natural rubber is:

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Q. The monomer of natural rubber is:

Bihar CECEBihar CECE 2001Polymers

Solution:

Key Idea: Monomer polymerize to form polymers.
(a) $ \underset{\begin{smallmatrix} \,\,\,\,\,\,\,\,\,\,\text{isoprene} \\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\text{or} \\ 2-\text{methyl}\,1,3-\text{butadiene} \end{smallmatrix}}{\mathop{C{{H}_{2}}=\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,-CH=C{{H}_{2}}}}\, $ It is monomer of natural rubber.
(b) Adipic acid is copolymer of nylon-66.
(c) Vinyl chloride is monomer of PVC.
(d) Acrylonitrile is monomer of PAN.