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polymerization molecular weight distribution

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Old   August 1, 2014, 17:03
Default polymerization molecular weight distribution
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Hi everyone

Now, I'm learning Fluidized bed reactor with polypropylene polymerization.
Catalyst and monomer are fed into the reactor.
In this system,Monomer will react with each other on catalyst surface and fluid domain.

Due to polymerization which generate new product (different molecular weight) along time.

Mechanism was shown in this picture.

-I need to know how to define molecular weight which change along time.
-How many species should i define?

Please help me!!

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