TY - JOUR
T1 - Significantly enhanced structural integrity of adhesively bonded PPS and PEEK composite joints by rapidly UV-irradiating the substrates
AU - Quan, Dong
AU - Alderliesten, René
AU - Dransfeld, Clemens
AU - Tsakoniatis, Ioannis
AU - Teixeira De Freitas, Sofia
AU - Scarselli, Gennaro
AU - Murphy, Neal
AU - Ivanković, Alojz
AU - Benedictus, Rinze
PY - 2020/10/20
Y1 - 2020/10/20
N2 - A high-power UV-irradiation technique was proposed for the surface treatment of PPS and PEEK composites, aiming to achieve good adhesion with epoxy adhesives. The composite substrates were rapidly UV-irradiated for a duration of between 2–30s, and then bonded using an aerospace film adhesive to produce joints. Tensile lap-shear strength and mode-I and mode-II fracture energies of the adhesive joints were investigated. It was observed that the application of a short-time UV-irradiation to the substrates transformed the failure mode of the specimens from adhesion failure to substrate damage in all cases. This consequently resulted in remarkable improvements in the mechanical and fracture performance of the adhesive joints. For example, the lap-shear strength increased from 11.8MPa to 31.7MPa upon UV-irradiating the PPS composites for 3s, and from 8.3MPa to 37.3MPa by applying a 5s UV-irradiation to the PEEK composites. Moreover, the mode-I and mode-II fracture energies significantly increased from ∼50J/m2 to ∼1500J/m2 and from <300J/m2 to ∼7000J/m2, respectively for both of the adhesively bonded PEEK and PPS composite joints.
AB - A high-power UV-irradiation technique was proposed for the surface treatment of PPS and PEEK composites, aiming to achieve good adhesion with epoxy adhesives. The composite substrates were rapidly UV-irradiated for a duration of between 2–30s, and then bonded using an aerospace film adhesive to produce joints. Tensile lap-shear strength and mode-I and mode-II fracture energies of the adhesive joints were investigated. It was observed that the application of a short-time UV-irradiation to the substrates transformed the failure mode of the specimens from adhesion failure to substrate damage in all cases. This consequently resulted in remarkable improvements in the mechanical and fracture performance of the adhesive joints. For example, the lap-shear strength increased from 11.8MPa to 31.7MPa upon UV-irradiating the PPS composites for 3s, and from 8.3MPa to 37.3MPa by applying a 5s UV-irradiation to the PEEK composites. Moreover, the mode-I and mode-II fracture energies significantly increased from ∼50J/m2 to ∼1500J/m2 and from <300J/m2 to ∼7000J/m2, respectively for both of the adhesively bonded PEEK and PPS composite joints.
KW - A: Adhesive joints
KW - A: Polymer-matrix composites (PMCs)
KW - B: Fracture toughness
KW - B: Strength
KW - E: Welding/joining
UR - http://www.scopus.com/inward/record.url?scp=85088090749&partnerID=8YFLogxK
U2 - 10.1016/j.compscitech.2020.108358
DO - 10.1016/j.compscitech.2020.108358
M3 - Article
AN - SCOPUS:85088090749
SN - 0266-3538
VL - 199
JO - Composites Science and Technology
JF - Composites Science and Technology
M1 - 108358
ER -