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Storage modulus (A) of the PEEK/EG composite melts versus angular frequency for different EG loadings and (B) storage modulus as a function of the EG volume fraction at a fixed frequency of 0.1 rad s −1 at 370°C. Inset: …
Storage modulus G'' represents the stored deformation energy and loss modulus G'''' characterizes the deformation energy lost (dissipated) through internal friction when flowing. Viscoelastic solids with G'' > G'''' have a higher storage modulus …
The blue line was the relationship between tan(δ) and temperature. The red line represents how the storage modulus varied with the temperature. In general, with the …
PEEK is a semicrystalline thermoplastic polymer with superior mechanical, thermal and chemical properties. Injection-molded PEEK exhibits an elastic modulus of around 3.6 GPa and ultimate strength of 100 MPa [ 27 ]. PEEK offers high-temperature and chemical stability, as it can be dissolved only at high temperatures in sulfuric acid [ 28 ].
Introduction. Thermoplastic and thermoset solids are routinely tested using Dynamic Mechanical Analysis or DMA to obtain accurate measurements of such as the glass transition temperature …
The 3D printed PEEK maintains a stable storage modulus, starting at 2.3 GPa at 25 °C and ending at 2.0 GPa at 150 °C which is the start of the glass transition temperature …
(or frequency), a DMA tensile test will give two independent quantities: the storage mod-ulus, which is often denoted E and can be linked to the stored elastic energy, and the loss modulus …
A DMA temperature sweep provides information on the storage modulus (elastic modulus) (E''), loss modulus (viscous modulus) (E"), and the tan Delta as a function of temperature. While …
Storage modulus E'' – MPa Measure for the stored energy during the load phase Loss modulus E'''' – MPa Measure for the (irreversibly) dissipated energy during the load phase due to internal …
It shows that the storage modulus of the PEEK resin tested by the single cantilever beam method experienced a rapid degradation before and after the Tg, which reveals that Tg would be an …
The elastic behaviour for PEEK at 140, 200, 250 °C can be observed up to the strain of 4.18%, 3.97%, 2.84% respectively, followed by a plateau which indicates the plastic behaviour for the same material. The PEKK also shows a similar trend of decreasing strain with increasing temperature.
Fig. 1 Temperature scans performed on the pure PEEK matrix. The left axis is the storage modulus (MPa) and the right axis is tanδ where the stress amplitude σ 0 and the phase lag φ …
The Elastic (Storage) Modulus: Measure of elasticity of material. The ability of the material to store energy. The Viscous (loss) Modulus: The ability of the material to dissipate energy. Energy lost …
The developed PEEK–GnP nanocomposite filaments by a melt-extrusion process showed excellent improvement in storage modulus at 30 °C (61%), and significant enhancement in tensile strength (34%), Young''s …
The blue line was the relationship between tan(δ) and temperature. The red line represents how the storage modulus varied with the temperature. In general, with the increasing temperature, the storage modulus …
It shows that the storage modulus of the PEEK resin tested by the single cantilever beam method experienced a rapid degradation before and after the Tg, which reveals that Tg would be an extremely ...
As shown in Fig. 1 c, the storage modulus of PEEK is analyzed by DMA as a function of temperature, and the storage modulus E'' shows a degradation from a high plateau (> 2500 MPa) to a low plateau (> 250 MPa) as the temperature increases.
The storage modulus and loss modulus of PEEK, PEI and a PEEK–PEI multilayered compound are shown in Figure 4 a,b, respectively. The storage modulus at 25 °C and T g are summarized in Table 1 The pristine …
The high value of storage modulus is almost constant in the operational temperature range and entirely in line with the nanosat operational environment. The value of …
Whilst impact strength of modified PEEK based materials was independent to temperature alteration. The toughening mechanism found for modified PEEK at 25 °C was hindered at −100 °C and −195 °C. Generally, matrix modification shifted the ductile/brittle fracture transition to lower temperatures.
The 3D printed PEEK maintains a stable storage modulus, starting at 2.3 GPa at 25 °C and ending at 2.0 GPa at 150 °C which is the start of the glass transition temperature …
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