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Kinetic and structural studies of the polymerization of N , N ′‐bismaleimide‐4,4′‐diphenylmethane with barbituric acid
Author(s) -
Su HengLei,
Hsu JungMu,
Pan JingPin,
Wang TsungHsiung,
Yu FuEn,
Chern ChorngShyan
Publication year - 2011
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21918
Subject(s) - diphenylmethane , polymerization , polymer chemistry , radical polymerization , isothermal process , materials science , bulk polymerization , chemistry , organic chemistry , catalysis , thermodynamics , polymer , physics
Both the isothermal and non‐isothermal polymerizations of N , N ′‐bismaleimide‐4,4′‐diphenylmethane (BMI) with barbituric acid (BTA) were investigated by the differential scanning calorimeter. The experimental results showed that the polymerizations of BMI with BTA were governed by the competitive Michael addition reaction and free radical polymerization mechanisms. Furthermore, the contribution of free radical polymerization becomes more important when the mole fraction of BTA decreases. 1 H NMR and 13 C NMR measurements further support the coexistence of the Michael addition reaction and free radical polymerization mechanisms. A preliminary kinetic model that took into account the competitive Michael addition reaction and free radical polymerization mechanisms was developed. POLYM. ENG. SCI., 2011. © 2011 Society of Plastics Engineers