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Kinetic studies on the bulk polymerization of methyl methacrylate (MMA) have been carried out using differential scanning calorimetry (DSC), both in the absence and the presence of 2,2'-azo-bis-isobutyronitrile (AIBN). A long induction period was found when AIBN was not used. Nevertheless, the reaction started and reached high conversion. A more severe test was carried out by inducing the polymerization without having removed the inhibitor present in commercial MMA. Again, the reaction started, but after a longer induction period, and it did not reach a high conversion. The tests carried out without AIBN were characterized by the appearance of an exothermic peak before the onset of the auto acceleration, probably due to the formation of radicals by the monomer itself. A more detailed study of the reaction has been performed when the initiator was used. All the thermokinetic parameters have been measured or calculated and show good agreement with those in the literature.

Additional information

Authors: FELIU J A, JRC Ispra (IT);BASSANI C, JRC Ispra (IT);SOTTILE C, Università di Messina, Dipartimento di ChimicaIndustriale (IT);MASCHIO G, Università di Messina, Dipartimento di ChimicaIndustriale (IT)
Bibliographic Reference: Paper presented: 5th International Workshop on Polymer Reaction Engineering, Berlin (DE), October 9-11, 1995
Availability: Available from (1) as Paper EN 39332 ORA
Record Number: 199512046 / Last updated on: 1996-01-15
Original language: en
Available languages: en