Search results

In contrast, hyperbranched polymers with less regularity of branched structures can be prepared more easily via facile synthetic strategies[30], thus creating the opportunity to practically manipulate and tailor the composition and structure for diverse applications.
Eq. 6 The branched structures of the copolymers have been demonstrated by 1H NMR and GPC analysis.
The slope value of the plot Log Rh/Log Mw for a given polymer with random coil structure (linear polymer) is usually larger than that for a polymer with spherical structure (branched polymer)[58].
Note, the spectrum shows clearly the double bonds within the structure at the chemical shift 5.8-6.4 ppm.
Chemistry-a European Journal 2002, 8, (13), 2838-2846

Zinc ferrite sorbents Zinc ferrite (ZnFe2O4) is a compound with positive spinel structure.
The reason is that these oxides can stabilize the pore structure to avoid ZnO sintering.
The ultrasonic method was feasible, and the zinc ferrite generated spinel structure.
[2] Fu C.: Physical Chemistry.
:J Chemistry Vol.63(2000),p.25-31.

The structure and mechanical properties of the fibers prepared from the cellulose solution were characterized by FT-IR, XRD, SEM and DSC.
It might be the result of more perfect crystalline structure in residual cellulose.
The set of properties of the physical structure of cellulose is determined by hydroxyl and oxymethyl groups with relatively stable forms of the pyranose ring and the chains of the macromolecules.
The structure of cellulose fibres was dense and homogeneous with smooth surfaces and circular cross-sections.
Lange’s chemistry handbook; McGraw-Hill Inc, 1999, 4 [8] Swatloski, R.

However, imaging soft, easily deformable structures such as biological material in liquid media leads to a very different scenario.
Images of SDS adsorbed structures on silicon or gold within liquid could not be obtained due to the weak surfactant/substrate interaction.
The vesicles have dimensions of 210±40 nm but the most common structure corresponds to liposomes formed by aggregation of two or more smaller vesicles (Fig. 3a).
Conclusions High resolution AFM has enabled direct visualization of adsorbed surfactant structures on both hydrophilic and hydrophobic substrates.
Adamson: Physical Chemistry of Surfaces (John Wiley and Sons, New York 1990)

Most recent studies have concentrated on control of the nanotube structures including pore size, wall thickness and length.
Their morphological structure was observed with FESEM (Hitachi S–4800).
This difference may be ascribed to the difference of the tube length and surface structure of the TiO2 nanotube array.
The index of refraction of nanoporous layer is affected by the structure of the oxide layer and is therefore, in most cases, lower than that without porous or tubular structures.
Therefore, the interference color can be controlled by the anodization time and utilized to identify the thickness of the oxide layer and the structure of the oxide layer.

In addition, because of the stability of the crystal structure, the HAp can include various kinds of ions in the Ca2+, PO43- and OH- sites.
Thus, it has lots of strains and defects with nano-scale sizes in the crystal structure.
After soaking in SBF for predetermined period, surface structure of the ceramics were observed using SEM.
It has also reported that Na+ ions were incorporated into the HAp structure, whereby the a-axis decreased and the c-axis increased [19].
Yamamuro, Solutions able to reproduce in vivo surface-structure changes in bioactive glass-ceramics A-W, J.

Lightweight Carbon Fiber Rods and Truss Structures.
Chemistry of thermal ageing in aerospace epoxy composites.
The Analysis of Skin-to-stiffener bonding in composite aerospace structures.
Composite Structures. 2002, 57(1): 425~435
Composite Materials for Aircraft Structures.

The structure of the resulting carbon nanostructures were characterized using transmission electron microscopy (TEM).
The results showed that the amounts of H2 and C2H4 content used in CVD process have a strong effect on the structure resulted.
The present results suggest that these theories cannot explain the formation of bamboo structure in our work.
Thus revealed the lowest quality of structure produced.
Cutler, Carbon Deposition and Hydrocarbon Formation on Group VIII Metal Catalysts, The Journal of Physical Chemistry B, 102 (1998) 4165-4175

Compound Structure of redox couple EA2+/+•/ V vs.
[44] CRC Handbook of Chemistry and Physics, 76 ed.; CRC Press: Boca Raton, New York, London, Tokyo, 1995
FIELD Full Journal Title:Journal of Organometallic Chemistry, Vol. 694 (2009), p. 1049
Efremenko,; Russian Journal of Inorganic Chemistry, Vol.15 (1970), p. 530
Materials Chemistry 1980, 5, 117

Introduction Asphalt is an organic mixture with complex compounds and chemical structures.
The structure of layer clay modified asphalt can be classified into two types, intercalated structure and exfoliated structure.
The intercalated structures correspond to well-ordered multilayered structures where the asphalt chains are inserted into the gallery space between the silicate layers.
The exfoliated structures correspond to delaminating structures where the individual silicate layers are no longer close enough to interact with the gallery cations.
Effect of Ageing on Bitumen Chemistry and Rheology.