שאלה | A certain monomer is polymerized by benzoyl peroxide labeled in the benzene ring with carbon-14. Analysis by carbon counting shows that the polymer contains on average 1.9 labeled phenyl groups per molecule. Assuming no chain transfer occurred what does this indicate about the mechanism of termination? (Choose from r the following four possibilities)

A certain monomer is polymerized by benzoyl peroxide labeled in the benzene ring with carbon-14. Analysis by carbon counting shows that the polymer contains on average 1.9 labeled phenyl groups per molecule. Assuming no chain transfer occurred what does this indicate about the mechanism of termination? (Choose from r the following four possibilities)

		Most of the termination occurred by disproportionation and a small fraction by chain coupling.
		Most of the termination occurred by coupling and a small fraction of by disproportionation
		Termination occurred mainly by reaction with coupling of the propagating chains to radicals generated by the benzoyl peroxide
		None of the above.

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