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In situ generated diphenylsiloxane‐polyimide adduct‐based nanocomposites
Author(s) -
Goswami Manisha G.,
Singh Rahul,
Tiwari Atul,
Nema S.K.
Publication year - 2005
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.20233
Subject(s) - polyimide , nanocomposite , materials science , thermogravimetric analysis , siloxane , fourier transform infrared spectroscopy , thermal stability , in situ polymerization , polymerization , polymer chemistry , in situ , adduct , infrared spectroscopy , chemical engineering , methanol , polymer , composite material , organic chemistry , chemistry , layer (electronics) , engineering
Arylsiloxane was incorporated into polyimide (PI) via electronic interaction with polyamic acid (PAA)/PI, and a wide spectrum of properties were evaluated for different compositions. The samples prepared with relatively low concentrations (0.0001–0.1%) of oligomers showed unusual synergism, which is attributed to the generation of nanostructures dispersed in the continuous PI matrix. The incorporation of siloxane with bulky phenyl groups contributed to enhanced thermal stability as determined by thermogravimetric analysis. Water uptake and methanol absorption by these composites were evaluated and correlated with the underlying micro‐ and nanostructures. Fourier Transform Infrared (FTIR) spectroscopy was used to elucidate the probable reaction mechanism (including in situ polymerization of arylsilanol), and to study the synthetic aspects associated with the molecular composites and nanocomposites formation. POLYM. ENG. SCI., 45:142–152, 2005. © 2004 Society of Plastics Engineers