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These changes affect the macromolecular structure due to excess addition of DGEBA.
The problem of working with off-stoichiometric mixtures is that latent reaction sites could remain on the macromolecular structure developed and under the proper conditions the structure can evolve, resulting in changes on the mechanical performance of the material.
The chemical reaction in a thermosetting resin forms a three-dimensional (3D) structure with high rigidity.
Homopolymerization of a polymer due to the cationic nature of the hardener plays an important role in dynamic cure chemistry of epoxy.
S., "Curing Reactions. in Epoxy Resins Chemistry and Technology”, May, C.

For example, samples with the addition of Fe NP and passed through EMT were a densely compact material with a rather low degree of structure porosity.
Konstantinov, et al, Production of large compact plates from ceramic powder materials by free shs compaction, Doklady Chemistry. 480 (2018) 136-138
Structure and properties of two-layer coatings, Surface Engineering and Applied Electrochemistry. 54(6) (2018) 535-545
Kaplanskii, Effect of nanosize strengthening particles on the structure of aluminum-based composite materials, Metallurgist. 60(1-2) (2016) 103-111
Kostikov, Effect of small additions of alumina nanoparticles on the strength characteristics of an aluminum material, Doklady Physical Chemistry. 481 (2018) 110-113.

Five different Ti3O5 crystal structures have been identified, which are closely related structurally and have different properties in terms of conductivity, magnetism and electronic structure.
For example: at room temperature, Ti3O5 remains in the form of a stable β-phase with a monoclinic structure.
X-ray phase analysis indicate that the crystal structures of the main phases of samples #4-7 are monoclinic with the C2/m space group.
Nature chemistry. 23 May 2010
Journal of Materials Chemistry C, 2016, 4: 10279−10285

This work was devoted for production of Zirconia (ZrO2) nanoparticles via PLAL technique from a solid zirconium target immersed in a group of wet environments in order to study the effect of different surfactants on the optical properties and structure of ZrO2 nanoparticles.
Ogale and co-workers [10] opened a new route in synthesizing metastable structures using PLAL technique in various confining liquids; they examined the potential of PLAL for metals surface modification applications such as metallic oxidation, nitriding and carbiding.
Kondow, Full Physical Preparation of Size-Selected Gold Nanoparticles in Solution: Laser Ablation and Laser-Induced Size Control, Journal Physics Chemistry B, 106 (2002), p. 7575–7577
Kondow, Structure and Stability of Silver Nanoparticles in Aqueous Solution Produced by Lase Ablation, Journal Physics Chemistry B, 104 (35) (2000), p. 8333–8337

Effect of rapid quenching in magnetic field on the microstructures and electrochemical performances of AB5-type alloys Yougen Tang, Chenxi Jiang, Yazhi Wang, Xiaopei Gao, Jinbao Zhang Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China Email：ygtang@263.net Keywords: AB5-type hydrogen storage alloys; rapid quenching; magnetic field; microstructures; electrochemical performances Abstract.
The results show that rapid quenching decreases the grain size of both alloys, and magnetic field results in an oriented growth especially for MlNi3.6Co0.35Mn0.5Al0.3Cu0.25 alloys, but they have little influence on the typical CaCu5 structure of AB5-type alloys except for the increase of cell parameters (a0, c0) and cell volume.
Phase structures of the as-cast, rapidly quenched and quenched in magnetic field alloys were determined by X-ray diffraction (XRD) (D/max/2550) with Cu Kα radiation at 40 kV and 300 mA from 0° to 90° at rate of 4°/min.
It can be seen that rapid quenching does not change the typical CaCu5 phase structure, whether or not magnetic field was imposed.

This paper presents an experimental verification of the alternative options for using by-products or mineral waste materials applied to cold recycled mixtures with low level of stabilisation intended for low-volume road structures.
Mechanical activation can be interpreted as a mechanical process or intervention in the structure of a substance to boost its chemical reactivity potential.
The material obtained was subject to X-ray diffraction analysis (XRD) at the Department of Environmental Chemistry laboratory, University of Chemistry and Technology, Prague.
Thanks to the crystal structure periodicity, the rays are dispersed resulting in interference, i.e. diffraction.

Physical forces, acting directly on the surface to be cleaned, are currently employed for delicate particle removal as an alternative to more aggressive chemistries [2].
However, collapsing bubbles close to a surface can also produce water jets and shockwaves which lead to damage of fragile structures.

Preparation and Characterization of 3-Glycidoxypropyltrimethoxysilane Functionalized Graphene Oxide Kunyan Wang * Department of Materials Chemistry, Huzhou University, Huzhou, 313000, China wkyan01@163.com Keywords: graphene, 3-glycidoxypropyltrimethoxysilane, functionalized Abstract.
The FGO have a sheet-like structure with wrinkles.
Introduction Graphene, monolayer of carbon atoms arranged in a honeycomb network, has gained tremendous interest because of their unique structure and outstanding properties, such as electronic, thermal, and mechanical properties.
Structural Characterization of FGO The FGO have a sheet-like structure, which provides a large surface area as indicated by SEM, TEM and AFM images shown in Fig. 2 and Fig. 3, respectively.
According to SEM and TEM observation, we concluded that the FGO have a sheet-like structure with wrinkles.

The structures of PU, unmodified epoxy resin and modified epoxy resin were identified by FI-IR spectra.
The structures of PU, unmodified EP and modified EP were confirmed by IR.
Since the –NCO can react with the carbamate or urea to produce cross-linked structure, resulting in a lot of particulates attached to reaction vessel.
The structure of PU prepolymers was identified by IR spectra.
Wang: Materials Chemistry and Physics, Vol. 130(2011) No.1-2, p.680.

The addition of GO doesn’t change the crystalline structure of PP, but leads to the decrease of spherulite dimension.
Introduction Since graphene was prepared successfully by Geim et al[1] in 2004, a complete system of carbon materials was finished, including from zero-dimensional fullerene, one-dimensional carbon nanotube, two-dimensional graphene to three-dimensional diamond and graphite. graphene oxide, whose structure is similar to grapheme, was an important derivation of graphene known as functionalized graphene.
In recent years, the researches on graphene and graphene oxide have become an internationally hot issue in the fields of physics, chemistry and material sciences [3-4].
Meanwhile, the addition of GO destroys the structure of polypropylene crystallization grain.
The addition of GO doesn’t change the crystallization structure of polypropylene.