Simultaneously Enhanced Cryogenic Tensile Strength, Ductility and Impact Resistance of Epoxy Resins by Polyethylene Glycol |
Fig. 6. SEM images for the fracture surfaces of the samples after impact testing with various PEG-4000 contents: a 0 wt% at RT, b 0 wt% at 77 K, c 10 wt% at RT, d 10 wt% at 77 K, e 15 wt% at RT, f 15 wt% at 77 K, g 20 wt% at RT, h 20 wt% at 77 K. |
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