Engineering topics
Fuentes, Raymond
Publications and source records attributed to Fuentes, Raymond.
Sulfur: Stinky Corrosive and More Ubiquitous than Previously Assumed.
Abstract not provided.
Study of Poly(ether ketone ketone) (PEKK): Outgassing Characteristics and Likely Residual Synthesis Impurities
In May-June, 2020, a study was conducted to characterize the outgassing properties of a series PEKK (Poly(ether ketone ketone)) samples using cryo-GC/MS headspace analysis. Three sets of samples were interrogated: sample group 1 consisted of 2 additively manufactured PEKK samples (PEKK "ole and "New") prepared by KCNSC from powder material from Solvay Specialty Polymers USA, LLC. Sample groups 2 and 3 consist of 5 PEKK powder types (used as feedstock for additive manufacturing processes) and 4 additively-manufactured PEKK material lots, respectively. Contrary to expectations, all samples of PEKK material were observed to outgas sulfur-containing compounds. Other analyses (EDS/EMA, GC-TOF/MS of PEKK sample extractions) confirmed the presence of sulfur in the PEKK bulk material. Specifically, Diphenyl sulfone (used as a reagent or high-temperature solvent in the synthesis of Polyaryletherketone or PAEK polymers) was observed in three of the powders and in both the PEKK "Old" and "New" samples, suggesting that the source of the sulfur can be traced to impurities in the material left over from the synthesis process.
So Which Is It? In-column Thermal Isomerization of Volatile Acid Emitted from Urethane Conformal Coating and Determining Confidence.
Abstract not provided.
"Identification" of Unknown Outgassing Species Using Gas Chromatography-Mass Spectrometry.
Abstract not provided.
Conformal Coating Outgassing and the Difficult Identification Due to Product Thermal Rearrangement.
Abstract not provided.