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Polymers 2018, 10(7), 708; https://doi.org/10.3390/polym10070708

Preparation of Novel Epoxy Resins Bearing Phthalazinone Moiety and Their Application as High-Temperature Adhesives

1
Liaoning High Performance Resin Engineering Research Center, Department of Polymer Science & Materials, Dalian University of Technology, Dalian 116024, China
2
PetroChina Co., Ltd., Jilin Petrochemical Branch, Jilin 132022, China
*
Authors to whom correspondence should be addressed.
Received: 30 May 2018 / Revised: 22 June 2018 / Accepted: 25 June 2018 / Published: 26 June 2018
(This article belongs to the Special Issue Thermal Properties and Applications of Polymers)
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Abstract

Most polymer-based adhesives exhibit some degree of degradation at temperatures above 200 °C, and so there is a need for the development of adhesives that can be used at high temperatures. A series of poly(phthalazinone ether nitrile sulfone ketone)s terminated with epoxy (E-PPENSK) and amine (A-PPENSK) groups have been prepared, which have been used as precursors can be applied for high-temperature resistant epoxy adhesives. The structured of these E-PPENSK (epoxy resin) and A-PPENSK (curing agent) components have been characterized by 1H nuclear magnetic resonance (NMR) and Fourier transform–infrared spectroscopy (FT–IR) studies, with the effects of molecular weights and molar ratios on the gel content of their polymers being determined. Cured epoxy resins derived from E-PPENSK and A-PPENSK showed good thermal stability, with an optimal resin retaining 95% of its weight at 484 °C, which gave a char yield of 62%. This adhesive was found to exhibit good mechanical strength, with a single-lap adhesive joint (A-3000/E-6000) exhibiting a shear strength of 48.7 MPa. Heating this adhesive at 450 °C for 1 h afforded a polymer that still exhibited good shear strength of 17.8 MPa, indicating that these adhesives are potentially good candidates for high-temperature applications. View Full-Text
Keywords: poly(aryl ether); phthalazinone; epoxy adhesive; high-temperature resistant poly(aryl ether); phthalazinone; epoxy adhesive; high-temperature resistant
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Wang, L.; Wang, J.; Qi, Y.; Zhang, F.; Weng, Z.; Jian, X. Preparation of Novel Epoxy Resins Bearing Phthalazinone Moiety and Their Application as High-Temperature Adhesives. Polymers 2018, 10, 708.

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