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propagation step

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propagation step [‚präp·ə′gā·shən ‚step]
(chemistry)
In a chain reaction, one of the fundamental steps that take place repeatedly until the reaction is complete.


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[FIGURE 4 OMITTED] Mechanisms Almost all thermal oxidations of vinyl polymers at moderate temperatures are postulated to involve the hydroperoxide radical in the propagation step of the degradation.
[MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] The propagation step involves H: shift and :CH3 group shift to form tertiary carbenium ion which is more stable and abundantly available during propagation.
Once the free radical process is initiated, abstraction of the most labile hydrogen atom in the polymer by alkylperoxy radical predominates in the propagation step (ref.
 
 
 
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