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|Title:||Thermal graft copolymerization-induced adhesion improvement of a FR-4/PETG laminate|
|Authors:||Zhang, Y. |
|Source:||Zhang, Y., Tan, K.L., Zhang, J., Cui, C.Q., Lim, T.B., Kang, E.T. (2000-04-01). Thermal graft copolymerization-induced adhesion improvement of a FR-4/PETG laminate. International Journal of Adhesion and Adhesives 20 (2) : 165-171. ScholarBank@NUS Repository. https://doi.org/10.1016/S0143-7496(99)00037-8|
|Abstract:||The lamination of a glass fibre-reinforced and epoxy-based printed circuit board (PCB) substrate, FR-4, to an amorphous thermoplastic copolyester of dimethyl terephthalate with ethylene glycol and 1,4-cyclohexanedimethanol, PETG, was studied. The lamination was achieved by the simultaneous surface graft copolymerization of glycidyl methacrylate (GMA) on the argon plasma-pretreated FR-4 substrate and PETG film at an elevated temperature. The plasma-treated surfaces and the delaminated surfaces were characterized by X-ray photoelectron spectroscopy (XPS). The adhesion strength between the FR-4 substrate and the PETG film was assessed by the T-peel test method. The adhesion strength was affected by the plasma pretreatment time of the substrates, the lamination time, and the lamination temperature. The FR-4/GMA/PETG assembly from the simultaneous graft copolymerization with GMA and lamination exhibited a significantly more rapid lamination rate and a higher adhesion strength than those of the FR-4/epoxy/PETG assembly from the epoxy adhesive-induced lamination of the plasma-pretreated FR-4 and PETG films. The phenomena are consistent with the presence of covalently bonded GMA graft chains on the surfaces of plasma-pretreated PETG and FR-4 films in the former assembly. The FR-4/GMA/PETG assembly failed by a combined cohesive and adhesional mechanism.|
|Source Title:||International Journal of Adhesion and Adhesives|
|Appears in Collections:||Staff Publications|
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