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Reduced graphene oxide catalytically enhances the rate of cyanate ester curing under variable frequency microwave heating

Journal Article · · Journal of Applied Polymer Science
DOI:https://doi.org/10.1002/app.53887· OSTI ID:2417753
 [1];  [2];  [2];  [2];  [2];  [2];  [3];  [3];  [2]
  1. Georgia Institute of Technology, Atlanta, GA (United States); OSTI
  2. Georgia Institute of Technology, Atlanta, GA (United States)
  3. Kansas City National Security Campus (KCNSC), Kansas City, MO (United States)

Here, the curing of Lonza Primaset PT-30 novolac cyanate ester resin and EPON 826 bisphenol-A diglycidyl ether were investigated using convective thermal heating and variable frequency microwave (VFM) heating. The addition of 1 part per hundred reduced graphene oxide (r-GO) to PT-30 novolac cyanate ester increased the VFM cure rate compared to thermal heating. Curing it at 160°C for 240 min with VFM heating resulted in a 55% degree of cure compared to a 26% degree of cure with thermal heating. This observed VFM rate enhancement is due to selective microwave heating of the r-GO particles in the resin resulting in increased r-GO catalytic activity toward cyanate ester curing. It is both a thermal and catalytic effect, the latter of which is absent when r-GO is added to a bisphenol-A diglycidyl ether resin with o-phenylenediamine hardener. Impurities present in the PT-30 matrix do not appear to contribute to its overall cure kinetics, nor do they participate in the observed VFM rate enhancement.

Research Organization:
US Department of the Navy, Washington, DC (United States); Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233121SNA000283; 89233122CNA000283
OSTI ID:
2417753
Alternate ID(s):
OSTI ID: 1971255
Journal Information:
Journal of Applied Polymer Science, Journal Name: Journal of Applied Polymer Science Journal Issue: 21 Vol. 140; ISSN 0021-8995
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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