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Solid‐state 13 C‐NMR study on bismaleimide/diamine polymerization: Structure, control of particle size, and mechanical properties
Author(s) -
Regnier N.,
Fayos M.,
Lafontaine E.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20001220)78:13<2379::aid-app150>3.0.co;2-l
Subject(s) - diamine , polymer chemistry , polymerization , materials science , thermal stability , elastomer , polymer , phase (matter) , particle size , chemical engineering , chemistry , composite material , organic chemistry , engineering
Bismaleimide polymers (BMI) are known for their good thermal stability and are used in a temperature range of 200–250°C, but they are brittle. New generations of BMIs with added comonomers or elastomers are less fragile. During the polymerization, the main reactions involved are the Michael's reaction (addition of a BMI with an aromatic diamine) and the ene reaction. Because the chemical structure of the network is dependent on the temperature, the reaction kinetics as a function of the thermal cycles of processing are compared using solid‐phase 13 C‐NMR. The morphology of the two‐phase structure and the mechanical properties (K IC ) are also studied. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 2379–2388, 2000