Polymer dynamics applied to PEEK matrix composite welding

Analysis of the Thermoplastic Composite Overmolding Process: Interface Strength

“…For both PET and PEEK polymers, the interfacial bond strength increased substantially with decreasing crystallinity in the original substrates. A similar poor interface performance for bonding below the melting temperature was observed by Lamèthe et al (2005), who studied bonding of PEEK around the melting temperature. Only when the surfaces were melted well, a sudden increase in fracture toughness of the interface was observed.…”

Direct assembly of cyclic olefin copolymer microfluidic devices helped by dry photoresist

“…Examples for dry film photoresists used in plastic LOC fabrication are ORDYL [22][23][24][25], e-NIT215 [26], Poly-ether-ether-ketone (PEEK) [27], TMMF [28] or self-made SU-8 foils [29,30]. ORDYL provides a set of interesting properties, such as its chemical stability, low cost and availability in a wide range of thicknesses.…”

Feasibility Study of Fusion Bonding for Carbon Fabric Reinforced Polyphenylene Sulphide by Hot-Tool Welding

“…In general, there are various test setups available for examining the strength of adhesive bonds or the growth of delaminations [25,26], such as (a) pure Mode I crack-growth with the double cantilever beam (DCB), (b) pure Mode II crack-growth with the end notch flexure beam (ENF), (c) combined Mode I and II with the Mixed Mode Bending (MMB) and (d) a structural test with the lap shear strength test (LSS). For evaluating the strength and the quality of the welds, the most commonly chosen experimental setups are the LSS [10,14,17,16,15] and DCB [14,15,24]. These methods give relevant information about the quality of the weld and are also quite useful for comparative studies [12].…”

“…The fusion bonding of pure thermoplastics is already a well known and commonly applied production process, but the process parameters cannot be extrapolated to the welding of fibre-reinforced thermoplastics, since the reinforcement has a large influence: the material is no longer isotropic, heat conduction is influenced … In general, these fusion bonding techniques can be categorised in three groups [7]: (i) frictional welding, including ultrasonic welding [8,9,10,11]; (ii) electromagnetic welding, including resistance welding [12,13,14,17,16,15,18,19,20,21] and induction welding [22,23] and (iii) thermal welding, including infrared welding [24] and hot-tool welding.…”