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what is free radical mechanism. i wanted to know in detail.

what is free radical mechanism. i wanted to know in detail.


 

Grade:12

2 Answers

Prudhvi teja
83 Points
13 years ago

Dear arush

Free Radical Mechanism

The relative stability of radicals can be correlated to the hydrogen bond dissociation energies of the parent compound.

High energy free radicals tend to abstract H from the backbone leading to grafting, branching reactions or decomposition for PP.

Lower energy radicals are more stable and selective.  They will preferably react on monomers containing double bonds and they are very good "monomer chasers" (acrylics, final stage in EPS, etc.)

 

Compound Dissociation
Energy (KJ/mol)
Type of radicals
381 Low energy radicals:
- high selectivity
- good diffusion
397
410
435 High energy radicals:
- poor selectivity
- good H abstractors
- good diffusion
439
469
469
498
377

 

The above shows the dissociation energies of various hydrogenated compounds.

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Regards,
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Prudhvi Teja

 

 


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Anuj Shrivastava
31 Points
13 years ago

A FREE RADICLE ATTACH IN AN ORGANIC COMPOUND BY ELIMINATING ANOTHER FREE RADICLE

THIS IS CALLED FREE RADICLE MECHANISM

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