A New Strategy to Improve the Toughness of Epoxy Thermosets—By Introducing Poly(ether nitrile ketone)s Containing Phthalazinone Structures

Hongjun Guo; Bing Wang; Xin Fu; Nan Li; Guiyang Li; Guodong Zheng; Zaiyu Wang; Cheng Liu; Yousi Chen; Zhihuan Weng; Shouhai Zhang; Xigao Jian

doi:10.3390/ma16072878

Materials (Apr 2023)

A New Strategy to Improve the Toughness of Epoxy Thermosets—By Introducing Poly(ether nitrile ketone)s Containing Phthalazinone Structures

Hongjun Guo,
Bing Wang,
Xin Fu,
Nan Li,
Guiyang Li,
Guodong Zheng,
Zaiyu Wang,
Cheng Liu,
Yousi Chen,
Zhihuan Weng,
Shouhai Zhang,
Xigao Jian

Affiliations

Hongjun Guo: State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China
Bing Wang: State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China
Xin Fu: Wuhan Second Ship Design and Research Institute, Wuhan 430064, China
Nan Li: State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China
Guiyang Li: Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China
Guodong Zheng: Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China
Zaiyu Wang: AVIC Jiangxi Hongdu Aviation Industry Group Company Ltd., Nanchang 330024, China
Cheng Liu: State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China
Yousi Chen: State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China
Zhihuan Weng: State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China
Shouhai Zhang: State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China
Xigao Jian: State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China

DOI: https://doi.org/10.3390/ma16072878
Journal volume & issue: Vol. 16, no. 7
p. 2878

Abstract

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As high brittleness limits the application of all epoxy resins (EP), here, it can be modified by high-performance thermoplastic poly(ether nitrile ketone) containing phthalazinone structures (PPENK). Therefore, the influence of different PPENK contents on the mechanical, thermal, and low-temperature properties of EP was comprehensively investigated in this paper. The binary blend of PPENK/EP exhibited excellent properties due to homogeneous mixing and good interaction. The presence of PPENK significantly improved the mechanical properties of EP, showing 131.0%, 14.2%, and 10.0% increases in impact, tensile, and flexural strength, respectively. Morphological studies revealed that the crack deflection and bridging in PPENK were the main toughening mechanism in the blend systems. In addition, the PPENK/EP blends showed excellent thermal and low-temperature properties (−183 °C). The glass transition temperatures of the PPENK/EP blends were enhanced by approximately 50 °C. The 15 phr of the PPENK/EP blends had a low-temperature flexural strength of up to 230 MPa, which was 46.5% higher than EP. Furthermore, all blends exhibited better thermal stability.

Published in Materials

ISSN: 1996-1944 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering; Technology: Engineering (General). Civil engineering (General); Science: Natural history (General): Microscopy; Science: Physics: Descriptive and experimental mechanics
Website: http://www.mdpi.com/journal/materials/

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