Search results

The development of goods and procedures that lessen the use and manufacture of harmful compounds is the focus of the relatively new and rapidly expanding discipline of green chemistry, also known as sustainable chemistry [13], [14].
Figure 1 present the oranges, blender and plastic bottle used when preparing the inhibitor. 5M H2SO4 solution was prepared by adding 28 millilitres of sulphuric acid into 972 millilitres of distilled water and the structure is presented in figure 2.
Sulphuric acid formula and structure Material preparation A brass solid bar of 30mm diameter and 10mm long was used, shown in figure 3.
One vital aspect of organic inhibitors is the existence of different functional groups and heteroatoms sulphur, oxygen, and nitrogen in their molecular structures.

Towards Bioelastomers via Coordination Polymerization of Renewable Terpenes Using Neodymium-Based Catalyst Systems Ramón Díaz de León1,a, Ricardo López1,b, Luis Valencia2,c, Ricardo Mendoza1,d, Judith Cabello1,e Javier Enríquez1,f 1Research Center for Applied Chemistry, San José de los Cerritos 140, 25294, Saltillo, Coahuila, México 2Division of Materials and Environmental Chemistry, Stockholm University, Frescativägen 8, 10691, Stockholm, Sweden aramon.diazdeleon@ciqa.edu.mx, bricardo.lopez@ciqa.edu.mx, cluis.alexandro@mmk.su.se, dricardo.mendoza@ciqa.edu.mx, ejudith.cabello@ciqa.edu.mx, fjavier.enriquez@ciqa.edu.mx Keywords: terpenes, coordination polymerization, neodymium catalysts Abstract.
For polyocimenes obtained with DIBAH as cocatalyst, the cis-1,4 structure content visibly decreases when the [Al]/[Nd] ratio is incremented, calculating a value for this structure of 69.0 % for a [Al]/[Nd] ratio of 25 and 54.2 % for a ratio of 45.
In the case of My polymerizations it was also observed a slightly increment in the cis-1,4 structure content when the [Cl]/[Nd] ratio was increased, however in this specific case a diminution in the polymerization rate was detected (PMy-3, plot shown in Table 2) but without affecting the final yield of the polymerization determined at 120 min of reaction.

Title of the conference Characterization and Evaluation of Ca/Al LDHs Adsorbents Synthesized by a One-Step Hydrothermal Method for Congo Red Removal Hong Tham Nguyen Thi1, Dao Thi To Uyen1, Duy Chinh Nguyen1, Van Thuan Tran1, Tri Duc Lam1, Long Giang Bach1,2, Dai Viet N-Vo3, Dai Hai Nguyen4, Sy Trung Do5, Trinh Duy Nguyen1,* 1NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam. 2Faculty of Chemical Engineering and Food Technology, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam 3Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, Malaysia 4Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam 5Institute of Chemistry, Vietnam Academy of Science and Technology, Hanoi City, Vietnam *Corresponding author : labams2013@gmail.com, ndtrinh@ntt.edu.vn Keywords: Layered double hydroxide, Congo Red, adsorption.
While health concerns caused by dyes stem from the fact that dyes could be naturally toxic, mutagenic or carcinogenic, environmental problems related to dyes often result from the stability of the substances’ aromatic structure which in turn characterizes their non-degradability.
For examination of crystal structures of LDHs samples, powder X-ray diffraction (XRD, Philips X’pert-MPD, Netherlands) techniques with Cu Kα radiation (λ = 1.5405 Å) was conducted.
The structure, composition and morphology of the Ca/Al LDHs were characterized by the TG/DTA, XRD patterns, FT-IR and SEM images.
Journal Material Chemistry, 19 (2009)

The introduction of natural rubber reduces strength due to disordering of the regular structure of polypropylene.
Agricultural and Biological Chemistry, 46: 877-878
Popov // Abstracts of the conference "Medical and Bioorganic Chemistry". - 2017.S. 583-584
Kolesnikova, AA Popov // Abstracts of the conference "Advanced materials with a hierarchical structure for new technologies and reliable structures." - 2017.

[7] GeunHyung Kim, SeungHyun Ahn, YunYoung Kim, YoungSeok Cho, Wook Chun, Coaxial Structured Collagen–Alginate Scaffolds: Fabrication, Physical Properties, and Biomedical Application For Skin Tissue Regeneration, Journal of Materials Chemistry, 21 (2011) 6165-6172
Structure, Gelation Rate and Mechanical Properties, Biomaterials, 22 (2001) 511-521
Alves, pH-Responsive Biomineralization onto Chitosan Grafted Biodegradable Substrates, Journal of Materials Chemistry, 18 (2008) 2493-2499
[13] Baoqiang Li, Yongliang Wang, Dechang Jia, Yu Zhou, Wei Cai, Mineralization of Chitosan Rods With Concentric Layered Structure Induced By Chitosan Hydrogel, Biomedical Materials, 4 (2009) 015011 (6pp).

Study on Technology of Filter Made by Engineering Grade Thermoplastic Polyurethane Jiamin ZHANG (School of Chemistry & Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, Henan, 453003, China) shuimugfz@163.com Corresponding author.
Zhang Jia Min, mainly engaged in Polymer Modification and Polymer Materials Processing and other research, E-mail: zjm@hist.edu.cn Address: School of Chemistry and Chemical Engineering and Technology, Henan Institute of Science and Technology, Road HUALAN, Xinxiang, Henan, China. 453003.
Dow company, brands 302EZ.TPU molecular structure contains amide base, ester base, ether base, etc, these groups have moisture tendencies.
The typically molding cycle of TPU decided to the hardness, thickness, configuration, product temperature, TPU have high hardness and the cycle time is short, plastic parts is thick and long cycle , plastic structure complex and cycle length. the molding cycle for TPU is generally between 20～60s.
Force the frozen molecular chain get to relaxation, exchange the solidification of macromolecular chains to random position, so as to eliminate the internal stress in this part, and improve the crystallinity, stable the crystalline structure, thereby enhancing the hardness, elastic modulus, lower elongation of the crystalline plastics.

Preparation and Optical Properties of Azo Polymer Containing Benzothiazole Group Guang-yu Wu1, a, Hai-bo Wang1 and Feng-xian Qiu2 1College of Food Science And Light Industry, Nanjing University of Technology, Jiangsu Nanjing 211816, China 2School of Chemistry and Chemical Engineering, Jiangsu University, Jiangsu Zhenjiang 212013, China agywuchem@163.com Keywords: Polyurethane; Transmission loss; Thermo-optic switch Abstract.
The structures of HEPNBT and HEPU were characterized using the Fourier transform infrared and UV-visible spectroscopy.
The structures of HEPNBT and HEPU were characterized using the Fourier transform infrared and UV-visible spectroscopy.
The result indicated that the diazo coupling reaction was successful, and the structure of the azobenzene was constructed and the absorption peak had blue shift after polymerization.
The chemical structures were characterized.

Diffuse reflectance spectra of ZnO structures are shown in (Fig. 4b).
This indicates a break in the chromophore structure of the contaminant [31].
Arshadnia, Micro-spherical SnO2/Zn2SnO4: Synthesis, heat treatment and photocatalytic efficiency for decolorization of two dye mixture in wastewater, Journal of Applied Chemistry, 11 : 41 (2017)
Uyar, Nanograined surface shell wall controlled ZnO–ZnS core–shell nanofibers and their shell wall thickness dependent visible photocatalytic properties, The Royal Society of Chemistry Catal.
Arabian journal of chemistry 12.7 (2019): 908-931

The molecular weights and end-group structures of all products were characterized by gel permeation chromatography (GPC) and 1H-NMR.
Ethylene glycol and 1,4-butanediol were purchased from Beijing Chemical Works, A.R. 1,8-octanediol was purchased from Aladdin Chemistry Co., Ltd., A.R.
P-Toluenesulfonic acid (TSA) was purchased from Bodi Chemistry Co., Ltd, A.R.
In this work, 1H-NMR was used to confirm the structure in order to determine whether they were hydroxyl terminated or not.

Senhadji5,e 1,3,4Faculty of Science, Laboratory of Polymer Chemistry, University of Oran Es-Senia.
It determines the service life of concrete structures very significantly.
Also, these composites are often used as low-cost materials for preventing chemical attacks or repairing various reinforced concrete structures damaged by chloride-induced corrosion, as well as in structures exposed to aggressive environments where high resistance to acid, basic and chloride solutions is required.
Also, these composites are often used as low-cost materials for preventing chemical attacks or repairing various reinforced concrete structures damaged by chloride-induced corrosion, as well as in structures exposed to aggressive environments where high resistance to acid, basic and chloride solutions is required.
Medhat, Mechanical characteristics of modified unsaturated polyester resins derived from poly(ethylene terephthalate) waste, Society Chemistry Industrial, Polymer Int, 51, (2002) 183-189