PVC Chlorination Reaction Chemistry

CPVC is produced by reacting suspension PVC resin with chlorine. The reaction is initiated by decomposing diatomic chlorine dissolved in water into highly unstable and reactive chlorine 

The liberated hydrogen atom reacts with a chlorine molecule to form a molecule of hydrogen chloride and another chlorine atom  

The new chlorine atom attacks a polymer molecule and replaces another hydrogen atom, and this chain propagation sequence continues as long as both chlorine gas and hydrogen atoms on polymer chains remain in the system. If enough chlorine is added to the reactor, a structure similar to the following one might be obtained (the added chlorines are circled)  

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Neglecting the end groups, calculate the mass fractions of carbon, hydrogen, and chlorine in PVC and in the 67% Q produced in this process. (The molecular structure of this product is shown in the section on PVC chlorination reaction chemistry.)... 

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