Relevant bibliographies by topics / Alkyl amine based naphthoxazine

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  1. Journal articles
  2. Dissertations / Theses

Academic literature on the topic 'Alkyl amine based naphthoxazine'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Alkyl amine based naphthoxazine"

1

Uyar, Tamer, Zeynep Koyuncu, Hatsuo Ishida, and Jale Hacaloglu. "Polymerisation and degradation of an aromatic amine-based naphthoxazine." Polymer Degradation and Stability 93, no. 12 (December 2008): 2096–103. http://dx.doi.org/10.1016/j.polymdegradstab.2008.09.003.

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Asadov, Z. H., S. M. Nasibova, T. A. Poladova, R. A. Rahimov, and A. Z. Asadova. "Petroleum collecting and petroleum dispersing reagents based on alkyl amine and alkyl iodides." Materials Research Innovations 16, no. 3 (June 2012): 175–78. http://dx.doi.org/10.1179/1433075x11y.0000000055.

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3

Zhang, Guanran, Alex S. Loch, Jos C. M. Kistemaker, Paul L. Burn, and Paul E. Shaw. "Dicyanovinyl-based fluorescent sensors for dual mechanism amine sensing." Journal of Materials Chemistry C 8, no. 39 (2020): 13723–32. http://dx.doi.org/10.1039/d0tc03974h.

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4

Wang, Chen, Na Wu, Daniel L. Jacobs, Miao Xu, Xiaomei Yang, and Ling Zang. "Discrimination of alkyl and aromatic amine vapors using TTF–TCNQ based chemiresistive sensors." Chemical Communications 53, no. 6 (2017): 1132–35. http://dx.doi.org/10.1039/c6cc08237h.

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Ishida, Hatsuo, and Daniel P. Sanders. "Regioselectivity and Network Structure of Difunctional Alkyl-Substituted Aromatic Amine-Based Polybenzoxazines." Macromolecules 33, no. 22 (October 2000): 8149–57. http://dx.doi.org/10.1021/ma991836t.

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Muchan, Pailin, Jessica Narku-Tetteh, Teeradet Supap, and Raphael Idem. "Amine Structure-Foam Behavior Relationship and Its Predictive Foam Model Used for Amine Selection for Design of Amine-based Carbon Dioxide (CO2) Capture Process." Current Chinese Science 1, no. 1 (December 23, 2020): 43–57. http://dx.doi.org/10.2174/2210298101999201002094601.

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Background: The use of an amine solution to capture CO2 from flue gases is one of the methods applied commercially to clean up the exhaust gas stream of a power plant. One of the issues in this process is foaming which should be known in order to select a suitable amine for design. Objectives: In this work, all possible types of amines used for CO2 capture, namely, alkanolamines, sterically hindered alkanolamines, multi-alkylamines and cyclic amines, were investigated to elucidate their chemical structure–foaming relationships. Methods: Foam volume produced by each type of 2M amine solution with its equilibrium CO2 loading was measured at 40°C using 94 mL/min of N2 flow. Results: Amines with a higher number or a longer chain of the alkyl group exhibited higher foam volume because of alkyl group’s ability to decrease the surface tension while increasing the viscosity of the solution. An increase in the number of hydroxyl or amino groups in the amine led to the reduction of foam formation due to the increase in surface tension and a decrease in viscosity of the solution. The predictive foam models for non-cyclic and cyclic-amines developed based on the structural variations, surface tension and viscosity of 29 amines predicted the foam volume very well with average absolute deviations (AAD) of 12.7 and 0.001%, respectively. The model accurately predicted the foam volume of BDEA, which was not used in model development with 13.3 %AD. Conclusion: This foam model is, therefore, indispensable in selecting a suitable amine for an amine-based CO2 capture plant design and operation.
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Bae, Sa-Rang, Tae Won Lee, Kwangyong Park, and Soo Young Kim. "Tuning of Graphene Work Function by Alkyl Chain Length in Amine-Based Compounds." Electronic Materials Letters 15, no. 2 (December 12, 2018): 141–48. http://dx.doi.org/10.1007/s13391-018-00109-4.

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Ishida, H., and D. P. Sanders. "Regioselectivity of the ring-opening polymerization of monofunctional alkyl-substituted aromatic amine-based benzoxazines." Polymer 42, no. 7 (March 2001): 3115–25. http://dx.doi.org/10.1016/s0032-3861(00)00498-5.

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Zeng, Weili, Yujie Song, Jianning Zhang, Hong Chen, Ming Liu, and Wangqiao Chen. "Insights into the Intrinsic Factors Affecting the NIR Reflectance Based on Rylene Diimide Molecules." Materials 14, no. 18 (September 13, 2021): 5269. http://dx.doi.org/10.3390/ma14185269.

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A clear understanding of the relationships between molecular structure and NIR reflectance (700–2500 nm) behavior is important and highly desirable for developing appropriate NIR-reflective materials to combat NIR heat radiation from sunlight. In this research, three groups of imide-based compounds have been adopted to investigate the influence of the intrinsic molecular structures on the NIR-reflective properties. It is found out that for the compounds with alkyl groups, the NIR reflectance will increase as the degree of the conjugated backbone increases, especially for the reflectance from 1750 nm to 2500 nm. In addition, despite that the alkyl or amine groups deteriorate the NIR reflectance, the NIR reflectance varies within a certain interval and the isomers with branched alkyl groups show identical or smaller NIR reflectance than those of isomers with linear alkyl groups. For different compounds, crystallinity seems to almost have no relationship with their NIR reflectance.
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10

Mora, Tayouo, Boutevin, David, and Caillol. "Synthesis of Pluri-Functional Amine Hardeners from Bio-Based Aromatic Aldehydes for Epoxy Amine Thermosets." Molecules 24, no. 18 (September 9, 2019): 3285. http://dx.doi.org/10.3390/molecules24183285.

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Most of the current amine hardeners are petro-sourced and only a few studies have focused on the research of bio-based substitutes. Hence, in an eco-friendly context, our team proposed the design of bio-based amine monomers with aromatic structures. This work described the use of the reductive amination with imine intermediate in order to obtain bio-based pluri-functional amines exhibiting low viscosity. The effect of the nature of initial aldehyde reactant on the hardener properties was studied, as well as the reaction conditions. Then, these pluri-functional amines were added to petro-sourced (diglycidyl ether of bisphenol A, DGEBA) or bio-based (diglycidyl ether of vanillin alcohol, DGEVA) epoxy monomers to form thermosets by step growth polymerization. Due to their low viscosity, the epoxy-amine mixtures were easily homogenized and cured more rapidly compared to the use of more viscous hardeners (<0.6 Pa s at 22 °C). After curing, the thermo-mechanical properties of the epoxy thermosets were determined and compared. The isophthalatetetramine (IPTA) hardener, with a higher number of amine active H, led to thermosets with higher thermo-mechanical properties (glass transition temperatures (Tg and Tα) were around 95 °C for DGEBA-based thermosets against 60 °C for DGEVA-based thermosets) than materials from benzylamine (BDA) or furfurylamine (FDA) that contained less active hydrogens (Tg and Tα around 77 °C for DGEBA-based thermosets and Tg and Tα around 45 °C for DGEVA-based thermosets). By comparing to industrial hardener references, IPTA possesses six active hydrogens which obtain high cross-linked systems, similar to industrial references, and longer molecular length due to the presence of two alkyl chains, leading respectively to high mechanical strength with lower Tg.
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Dissertations / Theses on the topic "Alkyl amine based naphthoxazine"

1

Koyuncu, Zeynep. "Investigation Of Thermal Characteristics Of Naphthoxazines And Polynaphthoxazines Via Pyrolysis Mass Spectrometry." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610564/index.pdf.

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In this study, polymerization mechanisms of aromatic (C6H5 or C6F5) and alkyl (CH3, C2H5, C3H7, C6H13, C12H25 or C18H37) amine based naphthoxazine monomers (15-Na, 15Na-C1, 15Na-C2, 15Na-C3, 15Na-C6, 15Na-C12 and 15Na-C18) and thermal degradation mechanisms of polynaphthoxazines synthesized by curing the naphthoxazine monomers (P-15-Na, P-15NaF, P-15Na-C1, P-15Na-C2, P-15Na-C3, P-15Na-C6, P-15Na-C12 and P-15Na-C18) were studied by direct pyrolysis mass spectrometry. During the curing process, the evolutions of monomer and low mass aromatic or alkyl amines were detected below the curing temperature. The mass spectrometry findings indicated that the monomers were subjected to evaporation and degradation to a certain extent but also to polymerization during the curing process. It has been determined that the polymerization of aromatic amine based naphthoxazine monomer proceeded through the aniline units, either by coupling of the radicals produced by the ring opening of the side chains or by substitution to the benzene ring of aniline. However, even if no direct evidence to confirm polymerization by attack of &ndash
NCH2 groups to naphthalene ring was detected, it is not possible totally eliminate its existence. The evolution of aniline, the main thermal degradation product for this polymer was observed at relatively low temperatures indicating that thermal decomposition started by elimination of aromatic amine involving linkages. Coupling of &ndash
CH2 groups generated by loss of aniline, yielded naphthoxazines with unsaturated linkages that can recombine and form a crosslinked structure with higher thermal stability. Similarly, the polymerization of naphthoxazines based on alkyl amines followed opposing paths. The mass spectral data indicated that the coupling of alkyl amine radicals was the main polymerization pathway. Again, thermal decomposition of alkyl amine based naphthoxazines was started by loss of alkyl amines and diamines. The crosslinked structures produced by coupling of the radicals generated by lose of alkyl amines decomposed at relatively high temperatures.
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2

Matsson, Maria. "Adsorption of polyhydroxyl based surfactants." Doctoral thesis, KTH, Chemistry, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-421.

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Adsorption on solid surfaces from solution is a fundamental property of a surfactant. It might even be the most important aspect of surfactant behavior, since it influences many applications, such as cleaning, detergency, dispersion, separation, flotation, and lubrication. Consequently, fundamental investigations of surfactant adsorption are relevant to many areas.

The main aim of this thesis has been to elucidate the adsorption properties, primarily on the solid/water interface, of a particular class of polyhydroxyl based surfactants: the alkyl glucosides. By the use of ellipsometry, the equilibrium and kinetic aspects of adsorption on titanium dioxide with respect to structural effects has been studied. Furthermore, the effects of small amounts of cationic surfactant additives on the adsorption on silica have been investigated. The results have been compared with similar studies for other nonionic surfactants.

We have found that the surfactant structure has a strong effect on the adsorption properties. An increase in the surfactant chain length increases the cooperativity of the system. An increase in the head group polymerization decreases the cooperativity and the plateau adsorbed amount at equilibrium. The effect of surfactant structure on the adsorption kinetics depends on the concentration relative to the cmc, while the there is a decrease in the rate of desorption with increasing hydrophobic chain length independent of the concentration. The adsorption/desorption process is concluded to be diffusion driven, as suggested by the model used. When comparing these results with studies on ethylene oxide based surfactants, we conclude that the two types of surfactants exhibit similar trends on surfaces onto which they adsorb.

Adsorption from binary surfactant solutions is even more interesting than adsorption from single surfactant solutions, since it brings us one step closer to the systems used in applications. In addition, adsorption from a mixture can be very different from adsorption from any of the single surfactants in the mixture. Alkyl glucosides alone do not adsorb on silica, but addition of small amounts of a cationic surfactant to the alkyl glucoside solution allows for adsorption on silica. A comparison between the adsorption and bulk properties has shown that mixed micellization explains most, but not all, effects of the coadsorption properties. Changing the pH in the mixed systems reveals that a surfactant with a pH-dependent charge and the ability to adapt its charge to the environment, e.g. a surface, enhances the adsorbed amount over a wider range of pH values than a purely cationic surfactant.

It is well known that alkyl glucosides and ethylene oxides adsorb differently on different types of hydrophilic surfaces. As a consequence, replacing ethylene oxides with alkyl glucosides might not be all straight-forward; however, we have shown that the effect of the surface can be eliminated by the use of a cosurfactant.

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