Title: Quantitative Interfacial Adhesion Between Glass Fibers and Epoxy Resin with Dopamine Using a Microdroplet Pull-Out Test and AE Measurement

Authors: Joung-Man Park, Pyeong-Su Shin, Jong-Hyun Kim, Yeong-Min Baek, Ha-Seung Park, and K. Lawrence DeVries

DOI: 10.33599/nasampe/c.19.0657

Abstract: The evaluation of interfacial adhesion between fiber and epoxy matrix is very important. In this study, an advanced microdroplet pull-out test was introduced to quantitatively evaluate the interfacial adhesion. To improve the interfacial adhesion, dopamine was added in the epoxy resin whereas grease treatment was applied to the glass fiber to reduce the interfacial adhesion. Microdroplets made using different the pullout force were measured as well as studies of acoustic emission (AE) energy, establishing a relationship between the adhesive force and AE energy per embedded length. In addition, microdroplet fatigue tests were performed on microdroplets with the same embedded lengths. To observe the effect of interfacial adhesion, tensile specimens of milled glass fiber reinforced epoxy composites (GFRC) were manufactured and tensile tests were conducted. During this tensile testing, the stress distribution was determined using polarized optical light. These results indicated that the highest degree of curing of the epoxy resin was resulted in improved mechanical properties and interfacial shear strength (IFSS). In addition, the studies also demonstrated that the debonding force and fracture of the microdroplets were proportional to the AE energy accompanying fracture of specimens during microdroplet pull-out test with the associated AE test.

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Conference: CAMX 2019

Publication Date: 2019/09/23

SKU: TP19-0657

Pages: 9

Price: $18.00