In this section, you can access to the latest technical information related to the FUTURE project topic.

Preparation of hyperbranched polymeric ionic liquids for epoxy resin with simultaneous improvement of strength and toughness

The present work is based on a study of methylhexahydrophthalic anhydride (MHHPA) cured diglycidyl ether of bisphenol A (DGEBA) in the presence of a hyperbranched ionic liquid (HBP-Mim). Differential scanning calorimetry studies confirmed that the curing reaction was accelerated by HBP-Mim. The impact strength of DGEBA (17.1?kJ/m2) increased to 39.5?kJ/m2 after the addition of 9 phr HBP-Mim-2. Tensile and flexural properties also showed a significant improvement as the incorporation of 9 phr HBP-Mim-2 resulted in 63.1% and 135.2% increase in the tensile and flexural strengths of epoxy thermosets, respectively, compared with neat DGEBA. Thermal stability and thermomechanical properties of the HBP-Mim modified epoxy thermosets also showed a significant improvement. The simultaneous improvements in the mechanical and thermal properties could be attributed to increased free volume and cross-link density.

» Author: Junheng Zhang, Shiyuan Chen, Bin Qin, Daohong Zhang, Peng Guo, Qianjun He

» Reference: 10.1016/j.polymer.2019.01.003

» Publication Date: 09/01/2019

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