Journal
MACROMOLECULAR REACTION ENGINEERING
Volume 8, Issue 4, Pages 295-313Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mren.201300171
Keywords
crosslinking; cyclization; modeling; networks; NMRP
Categories
Funding
- CAPES
- CNPq
- FAPESP
- Marie Curie Initial Training Network Nanopoly'' [ITN-GA-2009-238700]
- Programa Operacional Regional do Norte [2]
- contract Polymer Reaction Engineering [NORTE-07-0124-FEDER-000014 (RL2_P3)]
- [SAESCTN - PIICDT/1/2011]
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Nitroxide-mediated polymerization of styrene-divinylbenzene has been modeled using generating functions of length distributions, pseudo-kinetic propagations, and numerical fractionation with the crosslinking rate depending on generation. Cyclization reactions are tackled by balances of sequences, yielding fair predictions of the measured pendant double bond concentration. With reduction in crosslinking, agreement for the experiments at 90 degrees C between predicted and measured weight-average, molecular weight, and weight fraction of gel is observed. A much higher relative crosslinking reactivity is observed at 130 degrees C as compared to 90 degrees C, likely an effect of the chain mobility.
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