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Kennesaw, GA, United States

Artyushkova K.,University of New Mexico | Pylypenko S.,Colorado School of Mines | Dowlapalli M.,Ascend Performance Materials | Atanassov P.,University of New Mexico
RSC Advances | Year: 2012

Building structure-to-property relationships is one of the most often attempted research tasks in today's material chemistry. In this report, we present a universal methodology for building structure-to-property relationship models based on statistical correlations between image parameters extracted from microscopic images and the property of interest. The methodology presented consists of conversion of SEM images into useful quantitative morphological descriptors, such as roughness and texture, by digital image processing, separating images into high- and low-frequency components reflecting roughness in meso- and macro- regimes, and applying principal component analysis (PCA) to correlate morphological parameters with other performance characteristics used to evaluate electrocatalysts' catalytic activity and durability. © The Royal Society of Chemistry 2012. Source

News Article
Site: http://cen.acs.org/news/ln.html

Federal safety officials are investigating an explosion at an Airgas production facility in Cantonment, Fla. that killed a worker. A preliminary investigation by the Florida State Fire Marshal showed that a nitrous oxide holding tank and two tankers in a loading bay were involved in the Aug. 28 explosion, says Jon Moore, a spokesperson for the fire marshal’s office. Investigators were not able to determine whether the explosion originated with the N O holding tank and tankers or it originated elsewhere and spread to the N O equipment, Moore says. The fire marshal has turned the investigation over to the federal Occupational Safety & Health Administration. “We have deployed a team of compliance officers,” Brian Sturtecky, director of OSHA’s Jacksonville area office, told C&EN on Sept. 1. “Right now, the priority is ensuring that the site is safe for any and all employees and inspectors. Once that is determined, we will proceed with a more in-depth investigation.” The U.S. Chemical Safety Board (CSB) has also deployed to the accident site. CSB is investigating because of the fatality and reported serious damage to the site, says spokesperson Hillary Cohen. In addition, CSB is concerned about the potential for more serious consequences, given the facility’s location in an industrial area and proximity to another company that uses pressurized gas spheres and tanks to store petroleum products. The Airgas facility is located adjacent to Ascend Performance Materials. No one at Ascend was hurt and site operations there are continuing, the company says in a statement. Ascend produces the nylon precursor adipic acid at the site, Ascend spokesperson Alison Jahn says. N O is a by-product of adipic acid production. Ascend provides a mixture of gases to Airgas, and Airgas uses the mixture to make N O, Jahn says. “We are deeply saddened by the loss of a member of our Airgas family,” the company says in a statement. “An investigation into the cause of the incident is under way and the facility remains closed at this time,” Airgas adds. The company declined to comment further.

Ascend Performance Materials and Solutia Inc. | Date: 2003-09-09

synthetic fibers for use in carpeting and flooring, industrial fibers, packaging, apparel and other woven, non-woven, knitted, braided, coated and similar fabrics, sheets, membranes and films, thread and industrial brushes.

Kaya E.,University of Southern Mississippi | Tarkin-Tas E.,University of Southern Mississippi | Osborn S.,Ascend Performance Materials | Ayotte R.,Ascend Performance Materials | And 2 more authors.
Journal of Polymer Science, Part A: Polymer Chemistry | Year: 2014

A 12-membered cyclic diamide monomer for nylon 64 was successfully synthesized in fairly high yield (∼45%). The synthesis conditions were varied to see the effect of the diamine and succinyl chloride reactants on yield. Threefold excess of 1,6-hexamethylenediamine (HDA) gave the highest yield, while further increasing the amount of HDA decreased the yield. Using N,N-diisopropylethylamine as acid scavenger resulted in the formation of two different cyclic amides, which were fully analyzed by 1H and 13C solution nuclear magnetic resonance spectrometry and mass spectrometry. Copolymerization of cyclic amides with ε-caprolactam via an anionic route gave a block copolyamide with a two distinct endotherms in the differential scanning calorimetry analysis. However, copolymerization by the hydrolytic route gave only nylon 6 with terminal 64 units. © 2013 Wiley Periodicals, Inc. Source

Novitsky T.F.,University of Southern Mississippi | Lange C.A.,University of Southern Mississippi | Mathias L.J.,University of Southern Mississippi | Osborn S.,Ascend Performance Materials | And 2 more authors.
Polymer | Year: 2010

Semi-aromatic polyterephthalamides 10,T and 12,T were synthesized with 0-60wt-% PA-6,T comonomer by a melt polycondensation process. Molecular weights of the copolymers ranged from 12,000 to 27,000g/mol and all produced tough melt-pressed films. The substituted aromatic carbon of the 13C NMR spectra revealed that comonomer sequences are statistical; e.g., 50:50wt-% PA-12,T-co-6,T copolymer had 12,T-12,T:12,T-6,T:6,T-6,T sequence ratios of approximately 1:2:1. Copolymers of both PA-10,T and 12,T exhibited a eutectic melting point at 30wt-% PA-6,T, with melting points decreasing linearly from 315 and 292°C to minima of 280 and 272°C, respectively. Melting enthalpies showed similar minima at ca. 35wt-% PA-6,T. WAXD and DMA were used to further characterize the eutectic behavior, and a comprehensive analysis of PA-6,T copolymer melting behavior is given. © 2010 Elsevier Ltd. Source

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