X-ray data for poly(aryl ether ketones)

Glass bead filled Polyetherketone (PEK) composite by High Temperature Laser Sintering (HT-LS)

“…Figure 6 presents the WAXD spectra of the injection moulded PEK and high temperature laser sintered PEK and GB/PEK composite samples. Reflections of crystal planes [31] 110, 111, 200, 112, 211 and 020 are indexed in the figure. The results are not surprising considering the difference in cooling rate applied in the two processes: injection moulding processes requires typically cooling times of few seconds, whereas the cooling in laser sintering process takes approximately 36 h at an average rate of 0.2•C min -1 .…”

High-Performance Coating Materials

“…However, although the Ce oxide offered an improved performance of the coating in inhibiting this reaction, the high-resolution SRFT-IR analysis revealed that the corrosion product, such as Al(OH) 3 , on the fin was generated at the interfaces between the fin and coating of ~ 10 µm thickness ( Figure 51). This finding strongly suggested that ~ 10 µm thickness of coating was not enough to abate the permeation of corrosive electrolytes through it during this cycle testing; therefore, an effort must be made to seek other earth metal oxides that will further prevent the cathodic corrosion reaction at the fin/coating interfaces.…”

“…Aminopropylsilane triol [H 2 N-(CH 2 ) 3 -Si(OH) 3 The surfaces of these substrates were coated with the non-doped and doped APST precursor solutions in the following sequence. First, to remove any surface contaminants, the test panels were immersed for 20 min at 80°C in an alkaline solution consisting of 0.4 wt% NaOH, 2.8 wt% tetrasodium pyrophosphate, 2.8 wt% sodium bicarbonate, and 94.0 wt% water.…”

“…When these liner polymers are left in an oven at a temperature above their melting point of > 250°C, chain extension of the main phenyl groups caused by melting leads to molecular orientation, which is reflected in the crystallization of the polymers during cooling from the melting temperature to a lower temperature [2][3][4]. Such crystallization behavior of the polyaryls gives them specific desirable characteristics, such as high temperature stability, high radiation, chemical, and hydrothermal resistance, and good mechanical and dielectric properties.…”

“…Based upon the background described above, our objective in this work centered on assessing the ability of a new-type aminopropylsilane triol (APST) precursor made by substituting the trimethoxy group, (OCH 3 ) 3 , within the APTMS for the triol group, (OH) 3 , to protect the air-cooled condensers against corrosion. This work also involved the modification of APST with the cerium (Ce) acetate.…”