Waterborne polyurethane (WPU) was prepared by using toluene diisocynate (TDI) and polyethylene glycol (PEG) as raw materials
and 2
2-dimethylolbutyric acid as chain extender. Hydroxyethyl methacrylate (HEMA) was used to terminate WPU.The self-emulsifying method was adopted to prepare HEMA-grafted WPU (HEMA-WPU) emulsion.Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR) and thermogravimetric analysis (TG) were used to characterize the molecular structure and thermal endurance of HEMA-WPU.Compared with WPU
the thermal endurance of HEMA-WPU was raised obviously.The inter-laminar shear strength (ILSS) of carbon fiber/epoxy resin composite samples after sizing by the prepared emulsion was raised by 7.5%