Curing reaction and mechanism of phenol-formaldehyde novolac resins for foundry

Yan Shi; Li-feng Wang; Yue Han

doi:10.1007/s41230-016-5079-x

China Foundry (May 2016)

Curing reaction and mechanism of phenol-formaldehyde novolac resins for foundry

Yan Shi ,
Li-feng Wang,
Yue Han

Affiliations

Yan Shi: School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
Li-feng Wang: Chongqing Changjiang Molding Material Group Co., Inc./ Enterprise Technology Engineering Research Center of Chongqing Powder Functional Materials, Chongqing 400709, China
Yue Han: Chongqing Changjiang Molding Material Group Co., Inc./ Enterprise Technology Engineering Research Center of Chongqing Powder Functional Materials, Chongqing 400709, China

DOI: https://doi.org/10.1007/s41230-016-5079-x
Journal volume & issue: Vol. 13, no. 3
pp. 205 – 210

Abstract

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In this study on the curing dynamics of phenol-formaldehyde novolac resins (PFNR) and hexamethylene tetramine (HMTA), two typical commercial PFNR were selected as examples and the curing reactions of the resins with HMTA were studied by differential scanning calorimetry (DSC). Based on the data calculated by the Kissinger equation and the Crane equation, a thermocuring dynamic model was established, from which the process conditions, activation energy, reaction kinetics equation and a first-order reaction of the curing reactions were derived.

phenol-formaldehyde novolac resins used for foundry; hexamethylene tetramine; differential scanning calorimetry; curing reaction and mechanism

Published in China Foundry

ISSN: 1672-6421 (Print)
Publisher: Foundry Journal Agency
Country of publisher: China
LCC subjects: Technology: Manufactures
Website: http://www.foundryworld.com/

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