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Role of Hydroxyl-Terminated Polybutadiene in Changing Properties of EPDM/ENR Blends Sarawut Prasertsria *, Passakorn Amnuayb, Khanitta Sripanc and Pranee Nuinud Rubber Science and Technology Program, Department of Chemistry, Faculty of Science, Ubon Ratchathani University, Warinchamrab, Ubon Ratchathani 34190, Thailand asarawut.pra@gmail.com, bpasskorn722@gmail.com, csripan_sc@hotmail.com, dnpranee-rubbu@hotmail.co.th Keywords: Rubber blends, Processability, Cure characteristics, Mechanical properties Abstract.
Experimental Preparation of EPDM/ENR blends; Chemical structures of EPDM, ENR and HTPB are illustrated in Fig. 1.
Structure and chemical characteristics of (a) EPDM, (b) ENR50 and (c) HTPB.

Albalawi1, Jayda Eldiasty2, Syed Khasim3,4 and Nacer Badi3,5 1Department of Chemistry, University College at Alwajh, University of Tabuk, Tabuk 71491, Saudi Arabia 2Department of Biology, University of Tabuk, Tabuk 71491, Saudi Arabia 3Department of Physics, Faculty of Science, University of Tabuk, Saudi Arabia 4Department of Physics, PESIT-Bangalore South Campus, Bangalore-560 100, India 5Center for Advanced Materials, University of Houston, Houston, Texas 77204-5004, USA 1 maalbalawi@ut.edu.sa, 2 galdiasti@ut.edu.sa, 3,4 syed.pes@gmail.com , 3,5 nbadi@uh.edu Keywords: Antimicrobial activity, silver nanoparticles, zinc oxide nanoparticles, copper nanoparticles, Tribulus Terrestris extract Abstract.
Nanoparticles ranging from 10-100 nm in size with amorphous or crystalline structures, exhibit high surface to volume ratio [2-4].
This is because the cell wall of the later is composed of a thick peptidoglycan layer, which consists of linear polysaccharide chains cross linked by short peptides thus forming more rigid structure leading to difficult penetration of the metal nanoparticle as compared to the gram negative bacteria where the cell wall possesses thinner peptidoglycan layer [13].
Gram-positive bacteria should be more sensitive to the effect of antimicrobial agents due to the fact that their cell walls have a different structure.
Bakumov, K.Gueinius, C.Hermann, M.Schwarz, E.Kroke, Poly-silazane-derived antibacterial silver-ceramic nanocomposites, Journal of European Ceramic Society, 27(2007)3287-3292 [9] C.Damm, H.Munstedt, A.Rosch, The antimicrobial efficacy of poly-amide 6/silver-nano-and-microcomposites, Materials Chemistry and Physics, 108 (2008) 61-66 [10] S.M.Hussain, K.L Hess, J.M.

A promising approach to solving the designing and directed synthesis problem of new polyfunctional materials with desired properties based on fibrous complexites is to study the physicochemical characteristics and spatial structure of complexites, which, due to the nature of the groups, usually exhibit the properties of polyelectrolytes.
Taking into account the above mentioned studies and factors, fibrous structures – fibers of natural and synthetic origin – can be an effective and convenient matrix for HMCC used as catalysts.
In conclusion, we should note that the actual experimental material already available and the research intensification in the direction of a detailed study of the factors determining the structure and properties of fiber-based HMCC will help to understand the nature of the catalytic action by determining the role of metal and polymer.
Russian Journal of Inorganic Chemistry, 51 (2006) 4 649–655
Environmental Chemistry Letters volume, 1 (2021) 9 557–582

In this paper, selected applications are chosen to illustrate the processing-related, fundamental structure-property principles in microalloyed steels now being used in a breadth of new automotive components.
Not only base as-cooled microstructures and properties must be evaluated, but also optimization of chemistry, reheating and forging of bars, and subsequent finishing treatments must be considered.
Example austenite grain structures obtained in a series of SAE 8620 steels with systematic Nb variations [31] to a Ti-modified SAE 8620 steel are presented in Fig. 5 [25].
The properties resulting from the different austenite grain structures shown in Fig. 6 are the subject of ongoing studies [32].
Some different microalloying approaches have been used to influence the hot-dip coating response, as the details of grain-boundary chemistry influence reactions between the steel substrate and molten zinc [41].

This research explores the common representation of silicon dioxide (SiO2) in the field of chemistry.
Multiscale structure of super insulation nano-fumed silica studied by SAXS, tomography, and porosimetry.
Constitution and Structure of Bitumens.
The Colloidal Structure of Bitumen: Consequences on the Rheology and the Mechanisms of Bitumen Modification.
The Chemistry and Technology of Petroleum. 5th ed.

Fig. 1 shows the chemical structure of SDS, SDBS, and Tween 80.
Chemical structures of the surfactants Each surfactant with a concentration of 0.25 wt% was dispersed in de-ionized water with the aid of magnetic agitation for 10 minutes.
Olubambi, A review of heat transfer application of carbon-based nanofluid in heat exchangers, Nano-Structures & Nano-Objects 20 (2019) 100394
Sharma, Use of natural gums as green corrosion inhibitors: an overview, International Journal of Industrial Chemistry vol. 6 (2015) 153–164
El-Kshlan, Effect of Tween-80 Surfactant on the Corrosion Resistance of Zn-Phosphated Steel, Physical Chemistry vol. 7 (2017). 17–26

The chemical structure of Nafion ® is as below: Fig. 2, General chemical structure of a PFSA membrane.
Fig. 6, Chemical structure of Hyflon Ion and Nafion ® [53].
Various weight percentages of HPAs were loaded onto Y-zeolite and MCM-41 structures.
Electroanalytical Chemistry Vol. 489(1998), p. 209 [27] W.
Fenton, American Chemical Society, Division of Fuel Chemistry Vol. 50(2) (2005), p. 482 [33] S.

Irfaia, Roto Rotob* and Nurul Hidayat Aprilitac Department of Chemistry, Universitas Gadjah Mada, Indonesia, Bulaksumur, 55281 Yogyakarta, Indonesia arizal.aditya.i@mail.ugm.ac.id, broto05@ugm.ac.id, cnurul.hidayat@ugm.ac.id Keywords: Fe3O4@SiO2 magnetic nanoparticles, aminopropyl trimethoxy silane, copper, adsorption Abstract.
TEM images suggest that the products have a spherical shape with a particle size of about 20 nm in diameter, and the silica-coated magnetite has a core-shell structure.

Such a gradient structure over the cross-section of the wear-resistant coating allows achieving the best product performance.
Series: Chemistry and Chemical Technology. 7 (2011) 51-54

Magnesium Ferrite: Magnesium ferrite (MgFe2O4) belongs to a class of soft magnetic ferrites crystallizing with cubic spinel structure [13, 14].
The reaction was completed in a minute giving rise to dark grey voluminous product with a structure similar to a branched tree.
West, Solid State Chemistry and its Applications, John Wiley & Sons, Singapore (2003)
Romeijn, Physical Properties and Cation Arrangement of Oxides with spinel structures II.
Gorter, Magnetization in ferrites: saturation magnetization of ferrites with spinel structure, Nature, 165 (1950) 798-800