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Chain growth polymerization may proceed by the following mechanism |
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Answer» Condensation polymerization Free radical mechanism Initiation `R-overset(O)overset(||)(C)-O-O-overset(O)overset(||)(C)-R overset(DELTA)2R -underset(O)underset(||)(C)-O^(.)` `R-underset(O)underset(||)(C)-O^(.) to R^(.) +CO_(2)` Propagation, `R^(.)+ nCH_(2) =CH_(2) to R-CH_(2)-CH_(2)` `(-CH_(2)-CH_(2)-)_(n) CH_(2) overset(.)(C)H_(2)` Termination, `overset(.)(R)+overset(.)(R) to R-R ` `2R-CH_(2)CH_(2)-(CH_(2)-CH_(2)-)_(n) CH_(2) overset(.)(C)H_(2) to R-CH_(2)CH_(2)-(-CH_(2)-CH_(2)-)_(n) CH_(2)CH_(2)R` Ionic These are initiated by `CuSO_(4).HF` in `H_(2)O` for cationic polymerization . Initiation `H_(2)SO_(4)H^(+) +F^(-)` `H^(+) +CH_(2) =CH_(2) to CH_(3) CH_(2) -(CH_(2)-CH_(2)-)_(n)CH_(2)-overset(o+)(C)H_(2)` Termination  Hence choices (b),(c) and (d) are correct while (a) is incorrect. |
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