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Showing 1 to 20 of 22 for “"caprolactam"”.
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Air stripping and biological treatment of ammonium sulfate wastewater from the caprolactam manufacturing process
… of ammonium sulfate wastewater from the caprolactam manufacturing process, to determine if biological nitrification is a viable means of treatment, and to identify any compounds present in the ammonium sulfate wastewater that (might) inhibit nitrification. This was accomplished using a …
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Synthesis of functionalized polyamide 6 by anionic ring-opening polymerization
… presented in this thesis aim to copolymerize ԑ-caprolactam (CL) with different derivatives of α-amino-ԑ-caprolactam (which has a functionalizable primary amine) via anionic ring-opening polymerization. By using this strategy, we describe: (i) the synthesis of thermally more stable fluorinated …
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Multiscale Modeling of an Industrial Nylon-6 Leacher
… of small, cyclic oligomers in water and ε-caprolactam. Additionally, we develop an extension of COSMO-SAC to model polymer species, which we refer to as Polymer-COSMO-SAC, and apply it to solve liquid-liquid equilibrium equations. We present a unique methodology to apply COSMO-based models …
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The Structure-Function Relationships in Laminated Barrier Films
… acid, butylated hydroxytoluene (BHT) and e-caprolactam. Techniques were developed to determine, the diffusion (D), solubility (K), and permeability (P) coefficients for each additive through each polymer film and laminate at 100°C. The main technique used was permeation by gravimetry, and …
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Synthesis and characterization of polydimethylsiloxane-polyamide segmented copolymers
The polyamide poly(ε-caprolactam) or "nylon 6" is a very important fiber forming polymer which finds many applications in the carpet industry and elsewhere due to the very high strength of this fiber. However, a major drawback is its hydrophilicity. This feature influences both the surface and bulk …
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Effects of API particle size on the dissolution rate in molten polymer excipient matrices during hot melt extrusion, conducted in a co-rotating twin-screw extruder
… Acetaminophen (APAP) and amphiphilic polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer (PVCap-PVAc-PEG) (Soluplus) are chosen as the model API and water- soluble polymer excipient, respectively. APAP is milled using a fluid energy mill (FEM) into two different particle …
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Synthesis and characterization of high performance polymeric materials: poly(arylene ethers), polyamides, polyesters and liquid crystalline polyarylates
… as a base at elevated temperatures. Poly(ε-caprolactam) (Nylon 6) copolymers were prepared by the incorporation of controlled molecular weight poly(arylene ether sulfone) (PES) oligomer segments into the polymer backbone which were functionalized with carboxyl end groups. A hydrolytic melt …
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Research and Development of Simulation and Optimization Technology for Commercial Nylon-6 Manufacturing Processes
… phase equilibrium, diffusivities of water and caprolactam, and devolatization in vacuum-finishing reactors. We have designed all of the models herein to be fundamental, yet accessible to the practicing engineer. All of the analysis was done using commercial software packages offered by Aspen …
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Electrochemical synthesis of polyesters and polyamides. A study of the polymerisation of lactams, lactones and the anhydride/propylene oxide system by direct electrolysis of their conducting solutions
… oxide, maleic anhydride/propylene oxide, caprolactam, laurolactam and E-caprolactone in N,N-dimethylformamide (DMF), acetonitrile and tetrahydrofuran (THF) using alkali metal salts or quaternary ammonium salts as supporting electrolytes. Electrolysis were performed in the single and …
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Carbonylbiscaprolactam (CBC) : Isocyanat-freier Zugang zu blockierten Isocyanaten, Blockcopolymeren und reaktiven Dispersionen
… Arbeit war es, die Reaktivität von Carbonylbiscaprolactam (CBC) mit Nukleophilen systematisch zu erforschen und mögliche polymerchemische Anwendungen zu finden. <br>Als Nukleophile und potenzielle Reaktionspartner kamen in erster Linie Amine und Alkohole, aber auch Carbonsäuren bzw. Carboxylate …
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Investigation of liquid carryover in the girdler-sulfide process for production of heavy water at the AEC Savannah River Plant
… and two of the materials were identified as ε-Caprolactam and 2-methoxy furan. The results of the analyses correspond to chemicals used by textile and paper processing plants upstream from the Savannah River Plant. Result s of the work show that the Carbon Chlorofrom Extract (CCE) method …
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Neue fluoreszierende Copolymere für sensitive Detektionssysteme in Wasser
… radikalisch mit N Vinyl-pyrrolidon bzw. N Vinyl¬caprolactam zu wasserlöslichen, fluoreszierenden Copolymeren umgesetzt. In den N-Vinyl¬pyrrolidon-Polymeren (PNVP) wurde RhodaminB, in den thermoresponsiven N Vinyl¬caprolactam-Polymeren (PNVCL) ein Naphthalsäureimid als Fluorophor verwendet. …
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Advanced Process Design and Modeling Methods for Sustainable and Energy Efficient Processes
… 6 polymer is readily converted to its monomer caprolactam with or without the use of water as a solvent. While the recycling of post-consumer nylon 6 waste has been limited, the recovery and recycling of nylon 6 scrap and oligomers is well known. We identify the three processing routes commonly …
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THE RELEASE OF CONTAMINANTS BY LEACHING FROM BOIL-IN BAG LAMINATES
… by GC/MS. This revealed the presence of e- caprolactam (nylon monomer) and octahydrophenazine (a nylon impurity) from the nylon layer; propyl 3-(3'5' di-t-butyl-4-hydroxy phenyl) propionate (an antioxidant degradant) from the primary layer; and butylated hydroxy toluene (antioxidant) and a …
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Hyphenated fourier transform infrared spectrometry: techniques for separations and analysis
… of one of the primary extractables, caprolactam, SFE/SFC was used to quantitate the amount of residual starting material in a Nylon copolymer. The second study involves the extractables in polystyrene which is a softer polymer with respect to solubility of components in supercritical …
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Value chain diversification in the sugar industry using quantitative economic forecasting models
… based on published research and patents, namely caprolactam, dodecanedioic acid, adipic acid and muconic acid. However, all four chemicals would feature mainly in the textiles industry, which the model identifies as not being a high growth industry and thus would limit the revenue generating …
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Synthesis and characterisation of polyamide 6 blends made by reactive extrusion
Continuous anionic polymerisation of catalysed E -caprolactam has been undertaken on an intermeshing co-rotating twin-screw extruder for the preparation of polyamide 6. An optimised extruder screw and barrel configuration was used during reactive extrusion process to permit necessary feeding, …
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Poly(2-alkyl-2-oxazoline) containing multiphase systems
… as potential blend compatibilizers for poly(ε-caprolactam) (Nylon 6) and isotactic poly(propylene). Analysis of these blends by SEM indicated that PBVE-g-PMOX might function as a blend compatibilizer for Nylon 6/poly(propylene) blend while PMOX-b-PCL would not.
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