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Indexed by:期刊论文

Date of Publication:2021-02-02

Journal:POLYMER COMPOSITES

Volume:40

Issue:,SI

Page Number:E1283-E1293

ISSN No.:0272-8397

Key Words:Acoustic microscopes; Bonding; Carbon fibers; Chemical bonds; Differential scanning calorimetry; Fourier transform infrared spectroscopy; Heat resistance; Mechanical properties; Plastic products; Resins; Scanning electron microscopy; Shear flow; Thermal aging, Bismaleimide composites; Bismaleimide resins; Different proportions; Dynamic mechanical analysis (DMA); Fourier transform infrared; Inter-laminar shear strengths; Interfacial property; Scanning acoustic microscopes, Thermogravimetric analysis

Abstract:An oligomeric bismaleimide (BMI) containing both phthalide cardo and cyano group (PCBMI) was mixed with O,O'-diallyl bisphenol A (DABPA). The thermal properties of PCBMI/DABPA in different proportions (1:0.87, 1: 1, and 1: 1.2) and their composites were characterized using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and dynamic mechanical analysis (DMA). In addition, the mechanical properties of the prepared composites were also investigated. The results exhibited excellent thermal stability, heat resistance, and mechanical properties. We further investigated the effects of thermal ageing at 200 degrees C and 250 degrees C in air for up to 1000 h on inter laminar shear strength (ILSS) of the carbon fiber-bismaleimide composites (T700/DPC87). Scanning electron microscopy (SEM) and scanning acoustic microscope (SAM) were employed to characterize interfacial property changes, and Fourier transform infrared (FTIR) was employed to characterize chemical changes due to ageing. The results indicated PCBMI/DABPA resin had an excellent interface bonding capacity and aging resistance. It can, therefore, be widely used in aeronautics and space industries. (C) 2018 Society of Plastics Engineers