A rubber-modified epoxy composite with very high toughness and heat resistance. Issue 9 (November 2019)

• Record Type: Journal Article
• Authors: Li, Binghai; Zhang, Xiaohong; Qi, Guicun; Wang, Xiang; Zhang, Jiangru; Han, Peng; Ru, Yue; Qiao, Jinliang
• Is Part Of: Polymers and polymer composites. Volume 27:Issue 9(2019)
• Page Start: 582
• Page End: 586
• Publication Date: 2019-11
• Subjects: Epoxy resin -- modification -- toughness -- heat distortion temperature -- elastomeric nanoparticles; Polymers -- Periodicals; 668.905
• DOI: 10.1177/0967391119854649
• Languages: English
• ISSNs: 0967-3911

Abstract

A high performance epoxy composite with very high toughness and heat resistance had been designed and prepared. Epoxy resin TDE-85 with an impact strength of 10.2 kJ m −2, a heat distortion temperature (HDT) of 121°C, and a glass transition temperature of 127°C was chosen as the matrix of the composite, while carboxylic nitrile-butadiene elastomeric nanoparticles (CNB-ENPs) coated with triethanolamine on the surface with a diameter of about 100 nm was selected as the modifier. Surprisingly, the rubber-modified epoxy resin exhibited not only very high toughness but also very high heat resistance. The HDT of epoxy resin TDE-85 after modification increased 57°C, reaching 178°C, while the impact strength increased by 107%, increasing to 21.1 kJ m −2 . The relationship between the microstructure and performance had been evaluated by transmission electron microscopy, mechanical testing, and dynamic mechanical analysis. The results showed that the CNB-ENP/TDE-85 composite resulted in large interface and a special morphology after modification.