Journal
THERMOCHIMICA ACTA
Volume 639, Issue -, Pages 53-65Publisher
ELSEVIER
DOI: 10.1016/j.tca.2016.07.011
Keywords
Silicone modified phenolic resins; Non-isothermal curing; Model-free isoconversional method
Funding
- special funds for key innovation teams of Zhejiang Province - Science and Technology Department of Zhejiang Province, P.R. China [2009R50016]
- China Scholarship Council [[2012]2013]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT09412]
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A silicone-modified phenolic resin (SPF) is synthesized by in-situ polymerization of 4,4'-(1,5-dipropyl-3,3-diphenyl-1,1,5,5-tetramethyltrisiloxane)bis-2-methoxyphenol(TDS), phenol and formaldehyde. The curing reaction and kinetics of SPF with hexamethylenetetramine (HMTA) are studied using a differential scanning calorimeter (DSC) in terms of the model-fitting and isoconversional methods. The results are described by Sestak-Berggren model precisely. The reaction kinetics show that the nonisothermal curing reaction of SPF/HMTA is autocatalytic, and is more affected by diffusion controlled process than PF/HMTA at high conversion stage. The isothermal conversion is predicted by using the model-free Vyazovkin method, exhibiting good agreement with experimental data. This study provide a method to understand how the silicone modifier affect the affect the curing behaviors of phenolic resins. (C) 2016 Elsevier B.V. All rights reserved.
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