Journal
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
Volume 113, Issue -, Pages 539-544Publisher
ELSEVIER
DOI: 10.1016/j.jaap.2015.03.014
Keywords
Preparation; Carbon foam; Pyrolysis; Properties
Funding
- National Natural Science Foundation of China [51272045]
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Carbon foams were prepared by direct pyrolysis of cyanate ester (CE) resins from the mixtures of phenol novolac cyanate ester (PNCE) and bisphenol A cyanate ester (BACE) at ambient pressure. Pyrolysis behaviors of the CE resins were characterized by thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and X-ray diffraction (XRD). In addition, influences of PNCE/BACE mass ratio on the characteristics of the resultant carbon foams were studied. Results show that the CE resin possesses better thermal stability with increasing PNCE/BACE mass ratio, whereas its self-foaming performance becomes worse during pyrolysis. The addition of PNCE to BACE leads to an increase in the bulk density of the resultant carbon foam but a decrease in both its porosity and open cell. Moreover, the compressive strength of the carbon foam increases with an increase in the PNCE/BACE. When the PNCE/BACE mass ratio varies from 0 to 0.75, the compressive strength of the carbon foam prepared increases from 3.25 to 9.6 MPa. (C) 2015 Elsevier B.V. All rights reserved.
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