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Title: Fire retardant polyetherimide nanocomposites

Abstract

Polyetherimide-layered silicates nanocomposites with increased char yield and fire retardancy are described. The use of nanocomposites is a new, environmentally-benign approach to improve fire resistance of polymers. An increase in the aromaticity yields high char residues that normally correlate with higher oxygen index and lower flammability. The often high cost of these materials and the specialized processing techniques required, however, have limited the use of these polymers to certain specialized applications. The effectiveness of fire retardant fillers is also limited since the large amounts required make processing difficult and might inadvertently affect mechanical properties.

Authors:
; ;  [1]
  1. Cornell Univ., Ithaca, NY (United States). Dept. of Materials Science
Publication Date:
Sponsoring Org.:
Department of Transportation, Washington, DC (United States)
OSTI Identifier:
522349
Report Number(s):
CONF-961202-
ISBN 1-55899-361-4; TRN: IM9739%%70
Resource Type:
Book
Resource Relation:
Conference: 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996; Other Information: PBD: 1997; Related Information: Is Part Of Nanophase and nanocomposite materials 2; Komarneni, S. [ed.] [Pennsylvania State Univ., University Park, PA (United States)]; Parker, J.C. [ed.] [Nanophase Technologies Corp., Burr Ridge, IL (United States)]; Wollenberger, H.J. [ed.] [Hahn-Meitner Inst., Berlin (Germany)]; PB: 573 p.; Materials Research Society symposium proceedings, Volume 457
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SYNTHESIS; FIRE RESISTANCE; POLYETHYLENE GLYCOLS; IMIDES; SILICATES; COMPOSITE MATERIALS; X-RAY DIFFRACTION; THERMAL ANALYSIS; MATERIALS TESTING; EXPERIMENTAL DATA

Citation Formats

Lee, J., Takekoshi, T., and Giannelis, E.P.. Fire retardant polyetherimide nanocomposites. United States: N. p., 1997. Web.
Lee, J., Takekoshi, T., & Giannelis, E.P.. Fire retardant polyetherimide nanocomposites. United States.
Lee, J., Takekoshi, T., and Giannelis, E.P.. 1997. "Fire retardant polyetherimide nanocomposites". United States. doi:.
@article{osti_522349,
title = {Fire retardant polyetherimide nanocomposites},
author = {Lee, J. and Takekoshi, T. and Giannelis, E.P.},
abstractNote = {Polyetherimide-layered silicates nanocomposites with increased char yield and fire retardancy are described. The use of nanocomposites is a new, environmentally-benign approach to improve fire resistance of polymers. An increase in the aromaticity yields high char residues that normally correlate with higher oxygen index and lower flammability. The often high cost of these materials and the specialized processing techniques required, however, have limited the use of these polymers to certain specialized applications. The effectiveness of fire retardant fillers is also limited since the large amounts required make processing difficult and might inadvertently affect mechanical properties.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1997,
month = 9
}

Book:
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  • This paper presents an experimental study of the infrared radiative properties of polyetherimide (PEI) thermoplastic films. The complex refractive index of the PEI films is obtained from transmittance measurements of thin film samples with thicknesses of 76 {micro}m (3 mil) and 127 {micro}m (5 mil). The transmittance measurements are performed using a Perkin-Elmer Fourier Transform Infrared (FTIR) Spectrometer. The results are to be used for thermoplastic and thermoplastic composite design/processing and space applications.
  • Enthalpy recovery of polyetherimide is measured during heating with differential scanning calorimetry (DSC) after cooling at various rates. The resulting annealing peaks are fit using the Moynihan-Tool-Narayanaswamy model of structural recovery. A self-consistent phenomenological equation is used to describe the experimentally observed structure and temperature dependence of the relaxation time in both glass and equilibrium regimes. Temperature gradients in the DSC sample are incorporated into the model calculations. When no thermal gradients are assumed, model parameters are found to vary with thermal history despite the use of the self-consistent equation for the relaxation time. Accounting for the presence of thermalmore » gradients in the DSC sample is found to affect the values of the model parameters needed to fit the data. However, thermal gradients are unable to account for the thermal history dependence of the model parameters or for the discrepancy between the observed and calculated shapes of the DSC annealing peaks.« less