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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"Caprolactam"”.
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Extraction of caprolactam in a rotating disk contactor extractor
Caprolactam (C₆H₁₁NO) is produced in industry primarily as a monomer to be converted to nylon-6 via a polymerization reaction. More demanding purity requirements for nylon-6 have increased the performance requirements of extraction columns in the purification train of caprolactam production. …
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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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Synthesis and characterization of alternating poly(amide urethane)s
… The starting materials for the synthesis were e-caprolactam, e-caprolactone, amino alcohols, diamines and carbonic acid derivatives, i.e. diphenyl carbonate and ethylene carbonate as substitutes for phosgene. A new synthesis was developed where the polycondensation of a-hydroxy-w-O-phenyl …
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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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