Influence of backbone chain length and functional groups of organic modifiers on crystallinity and nanomechanical properties of intercalated clay-polycaprolactam nanocomposites

2009 ◽  
Vol 6 (5/6) ◽  
pp. 468 ◽  
Author(s):  
Debashis Sikdar ◽  
Dinesh R. Katti ◽  
Kalpana S. Katti ◽  
Bedabibhas Mohanty
Keyword(s):  
Functional Groups ◽  
Chain Length ◽  
Organic Modifiers ◽  
Nanomechanical Properties ◽  
Backbone Chain

Molecular assembly of alkyl chain-grafted poly(l-lysine) tuned by backbone chain length and grafted alkyl chain

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 22783-22791 ◽  
Author(s):  
Bo-Yu Chen ◽  
Yun-Chiao Huang ◽  
Jeng-Shiung Jan
Keyword(s):  
Chain Length ◽  
Polypeptide Chain ◽  
Alkyl Chain ◽  
Molecular Assembly ◽  
Alkyl Chains ◽  
Backbone Chain

Alkyl chain-grafted poly(l-lysine) vesicles with tunable molecular assembly were prepared by varying the polypeptide chain length and grafted alkyl chains.

Development and Characterization of Bismaleimides Containing Aliphatic Chain for Microelectronics Application

e-Polymers ◽  
2006 ◽  
Vol 6 (1) ◽  
Author(s):  
J. L. Feng ◽  
C. Y. Yue ◽  
K. S. Chian
Keyword(s):  
Chain Length ◽  
Moisture Absorption ◽  
Thermomechanical Analysis ◽  
Stress And Strain ◽  
Aliphatic Chain ◽  
Melting Points ◽  
Scanning Calorimetry ◽  
Backbone Chain ◽  
Gel Temperature

AbstractA series of bismaleimide systems containing aliphatic backbone chain have been synthesized and investigated. Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), Thermomechanical analysis (TMA), rheometry and tensile test were used to characterize the thermal and mechanical properties. It was noted that backbone chain length and odd-even effect affected properties. As the chain length increases, the curing peak temperature, gel temperature of BMI all increase, but the melting point, glass transition and moisture absorption decrease. The melting points of BMI-3,5,7 reduced most significantly. The tensile properties were affected by odd even effect significantly. BMI-3,5,7 with odd number of carbons have less stress and strain than those of even ones.

Rhodium(III) Complexes with Acyclic Tetrathioether Ligands. Effects of Backbone Chain Length on the Conformation of the Rh(III) Complex

1996 ◽  
Vol 35 (26) ◽  
pp. 7546-7555 ◽  
Author(s):  
Niranjan Goswami ◽  
Roger Alberto ◽  
Charles L. Barnes ◽  
Silvia Jurisson
Keyword(s):  
Chain Length ◽  
Backbone Chain

Variation of fragmentation with chain length between two functional groups

1970 ◽  
Vol 4 (S1) ◽  
pp. 229-235 ◽  
Author(s):  
Catherine Fenselau ◽  
Anthony A. Baum ◽  
D. O. Cowan
Keyword(s):  
Functional Groups ◽  
Chain Length

scholarly journals Elecroantennogram Responses of the Cherry Fruit Fly Rhαgoletis cerαsi (Diptera: Tephritidae) to Naturally Occurring Volatiles

2017 ◽  
Vol 12 ◽  
pp. 31 ◽  
Author(s):  
D. Raptopoulos ◽  
A. Koutsaftikis ◽  
G. Haniotakis ◽  
E. Douma
Keyword(s):  
Functional Groups ◽  
Organic Compounds ◽  
Chain Length ◽  
Plant Volatiles ◽  
Fruit Fly ◽  
Carbon Chain ◽  
Carbon Chain Length ◽  
Naturally Occurring ◽  
Males And Females ◽  
Rhagoletis Cerasi

EAG responses of the cherry fruit fly, Rhagoletis cerasi (Linne) (Diptera: Tephritidae) were recorded in response to seventy-eight generally occurring plant volatiles and male cherry fruit fly volatiles. The test compounds are representatives of three major classes of organic compounds, aldehydes, ketones, and monoterpenes. No differences were observed in the degree of response between males and females, Carbon-chain length, unsaturation, and position of functional groups all have significant effect on the magnitude of EAG response.

Organic-ligand-assisted hydrothermal synthesis of ultrafine and hydrophobic ZnO nanoparticles

2010 ◽  
Vol 25 (2) ◽  
pp. 219-223 ◽  
Author(s):  
Tahereh Mousavand ◽  
Satoshi Ohara ◽  
Takashi Naka ◽  
Mitsuo Umetsu ◽  
Seiichi Takami ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Hydrothermal Synthesis ◽  
Carboxylic Acids ◽  
Functional Groups ◽  
Zno Nanoparticles ◽  
Organic Ligand ◽  
Polymer Matrices ◽  
Organic Modifiers ◽  
Hydrothermal Conditions ◽  
Zno Particles

In this study, we report the synthesis of uniform and narrowly size-distributed ZnO nanoparticles with sizes of approximately 3 nm; the nanoparticles were prepared by means of organic-ligand-assisted hydrothermal conditions with various organic modifiers. The results obtained herein revealed that among the various functional groups tested (alcohols, aldehydes, carboxylic acids, and amines), only hexanol effectively controlled the nucleation and crystal growth of spherical ZnO nanoparticles. The use of hexanol also caused the surface of the ZnO particles to change from hydrophilic to hydrophobic, which would enhance the dispersion of these particles in polymer matrices, paints, cosmetics, and other organic application media.

scholarly journals Clusters of Hydroxyl-Functionalized Cations Stabilized by Cooperative Hydrogen Bonds: The Role of Polarizability and Alkyl Chain Length

Molecules ◽  
2020 ◽  
Vol 25 (21) ◽  
pp. 4972
Author(s):  
Jule Philipp ◽  
Ralf Ludwig
Keyword(s):  
Hydrogen Bonding ◽  
Ionic Liquids ◽  
Hydrogen Bonds ◽  
Functional Groups ◽  
Chain Length ◽  
Alkyl Chain ◽  
Kinetic Stability ◽  
Alkyl Chain Length ◽  
Coupling Constants ◽  
Imidazolium Cations

We explore quantum chemical calculations for studying clusters of hydroxyl-functionalized cations kinetically stabilized by hydrogen bonding despite strongly repulsive electrostatic forces. In a comprehensive study, we calculate clusters of ammonium, piperidinium, pyrrolidinium, imidazolium, pyridinium, and imidazolium cations, which are prominent constituents of ionic liquids. All cations are decorated with hydroxy-alkyl chains allowing H-bond formation between ions of like charge. The cluster topologies comprise linear and cyclic clusters up to the size of hexamers. The ring structures exhibit cooperative hydrogen bonds opposing the repulsive Coulomb forces and leading to kinetic stability of the clusters. We discuss the importance of hydrogen bonding and dispersion forces for the stability of the differently sized clusters. We find the largest clusters when hydrogen bonding is maximized in cyclic topologies and dispersion interaction is properly taken into account. The kinetic stability of the clusters with short-chained cations is studied for the different types of cations ranging from hard to polarizable or exhibiting additional functional groups such as the acidic C(2)-H position in the imidazolium-based cation. Increasing the alkyl chain length, the cation effect diminishes and the kinetic stability is exclusively governed by the alkyl chain tether increasing the distance between the positively charged rings of the cations. With adding the counterion tetrafluoroborate (BF4−) to the cationic clusters, the binding energies immediately switch from strongly positive to strongly negative. In the neutral clusters, the OH functional groups of the cations can interact either with other cations or with the anions. The hexamer cluster with the cyclic H-bond motive and “released” anions is almost as stable as the hexamer built by H-bonded ion pairs exclusively, which is in accord with recent IR spectra of similar ionic liquids detecting both types of hydrogen bonding. For the cationic and neutral clusters, we discuss geometric and spectroscopic properties as sensitive probes of opposite- and like-charge interaction. Finally, we show that NMR proton chemical shifts and deuteron quadrupole coupling constants can be related to each other, allowing to predict properties which are not easily accessible by experiment.

Graphene oxide derivatives with variable alkyl chain length and terminal functional groups as supports for stabilization of cytochrome c

2016 ◽  
Vol 84 ◽  
pp. 227-235 ◽  
Author(s):  
Michaela Patila ◽  
Ioannis V. Pavlidis ◽  
Antonios Kouloumpis ◽  
Konstantinos Dimos ◽  
Konstantinos Spyrou ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Cytochrome C ◽  
Functional Groups ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length
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