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Study on Synthesis and Properties of Waterborne Polyurethane Modified by Epoxy Resin Zhiming Jin1,a Wenlu Guo1,b Caihua Gao1,c 1School of Biological and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, China aJinzhiming.888@163.com bguowl1954@163.com c812262759@qq.com Keywords: epoxy resin; modification; waterborne polyurethane; study Abstract.
The waterborne polyurethane (WPU) modified by epoxy resin was synthesized by using isophorone diisocyanate (IPDI), poly propylene glycol (PPG-1000), 2,2-dimethylol propionic acid (DMPA) and epoxy resin as the main raw materials.
Experiment section Main raw materials.
European Polymer Journal.

In polystructural materials, the appearance of cracks at various levels of structural heterogeneity is inevitable.
Analysis of Recent Research At the moment, in modern materials science, there are generally accepted methods for quantitatively assessing the crack resistance of a material by determining stress concentration coefficients.
The mechanisms of crack initiation and growth in heterogeneous coarse dispersed materials are hardly studied.
Golewski,  Evaluation of morphology and size of cracks of the Interfacial Transition Zone (ITZ) in concrete containing fly ash (FA), Journal of hazardous materials, 357 (2018) 298-304
Miroshnichenko, Influence of structural characteristics on concrete strength under dynamic effects, Materials Science Forum, 968 (2019) 368-379

Using the CCPs for civil engineering work, Pozzolanic reactions are very important character with hydration materials, but to measure Pozzolanic reaction by mortar test is necessary to wait very long term, waiting the new method of determine the Pozzolanic reactions.
So, chemical and mineralogical investigations were carried out on these inorganic materials.
In this study, entrained flow gasifiers, which work at high temperatures and produce a vitreous slag, such as IGCC is a high efficiency power generation technology which gasifies coal to be used as the fuel for gas turbines, are the target materials.
Acknowledgements This research is supported by the Basic Research Projects of Qingdao Municipal Science and Technology Plan (No. 10-3-4-5-1-jch).
The Open Civil Engineering Journal, 2011, 5, 124-131 [2] Hemmings et al, On the glass in coal ashes, Materials Research Society Symp.

Thermal Spraying of MCrAlY Overlay Coating Using New Ethanol-Fueled HVOF Gun Marek Góral1,a*, Tadeusz Kubaszek1,b and Barbara Kościelniak1,c 1Research and Development Laboratory for Aerospace Materials, Rzeszow University of Technology, Powstancow Warszawy 12, 35-959 Rzeszow, Poland amgoral@prz.edu.pl, btkubaszek@prz.edu.pl, cb.koscielnia@prz.edu.pl Keywords: HVOF, MCrAlY coatings, oxidation, corrosion Abstract.
The stainless steel 18-8 type was used as a base material.
Experimental The stainless steel 18/8 type was used as a base material for coatings deposition.
[6] Nowak, W.J., Kubaszek, T., Góral, M., Wierzba, B., Durability of underaluminized thermal barrier coatings during exposure at high temperature, Surface and Coatings Technology, 2020, 382, 125236 [7] Goral, M., Kotowski, S., Dychton, K., Drajewicz, M., Kubaszek, T., Influence of low pressure plasma spraying parameters on MCrAlY bond coat and its microstructure, Key Engineering Materials, 2014, 592-593, pp. 421–424 [8] A.
[12] Kubaszek, T., Pytel, M., Góral, M., The influence of LPPS process parameters on porosity and microstructure of MCrAlY coatings, Materials Science Forum, 2016, 844, pp. 181–186 [13] Goral, M., Kotowski, S., Dychton, K., Drajewicz, M., Kubaszek, T., Influence of low pressure plasma spraying parameters on MCrAlY bond coat and its microstructure, Key Engineering Materials, 2014, 592-593, pp. 421–424 [14] Drajewicz, M., Kubaszek, T., Koscielniak, B., Goral, M., Dziadosz, D., The isothermal oxidation of MCrAlY protective coatings, Materials Science Forum, 2021, 1016 MSF, pp. 407–412

Experiments Materials and sample preparation.
The d001 peak of the pristine clay was shifted to lower value when mixed with the epoxy to form the nanocomposite materials.
Both materials i.e. neat epoxy and epoxy-clay-nanocomposite gained mass due to the environmental solution uptake, as shown in Figs.3 and 4 for water and acid respectively.
Gupta et al., AIChE Journal, 51,12 (2005) [10] H.V.S.
Gupta, ACI Materials J., 97, 703 (2000) [12] O.

Materials and experimental details Chemical compositions of the Glass G oil well cement were given in Table 1.
In addition, water glass (WG), self-made latex JSW-1, fluid loss additive MJ and dispersantare LBR-1 are also used as auxiliary materials.
Cao: Construction and Building Materials Vol. 21 (2007), p. 1356
Russell: Construction and Building Materials Vol. 22 (2008), p. 1990
Cai: Journal of Hazardous Materials Vol. 164, p. 99.

It includes that force between molecules possessing dipoles and quadrapoles caused by the polarizations of the atoms and molecules in the material [9].
Acknowledgement The authors would like to express their sincere thanks to National Natural Science Foundation of China for their financial support (Grant No. 50535020).
[3] Wang Hongxiang, Gao Shi, Ma Encai, Xu Qiao, Chen Xianhua, and Hou Jing: Material science & Technology, Vol.115 (2007), pp.62-69 [4] Chen M.J., Wang J.H., Liang Y.C., and Yuan D.Y: Key Engineering Materials, Vol.339 (2007), pp.1-5
Beaudion: Journal of the Electrochemical Society, Vol.153 (2006), pp.175-181 [10] R.Khettabi, V.
Songmene, and J.Masounave: Journal of Materials Processing Technology, Vol.194 (2007), pp.100-109

Experimental Design and Result Equipments and Materials.
As work piece material, SKD61 with 200 mm x 30 mm x 15 mm size was used.
This recast layer is part of the workpiece material melted by electrical discharge and resolidified on the workpiece surface without being ejected nor removed by dielectric material.
Salem, Influence of machining parameters on the surface integrity in electrical discharge machining, Archives of Material Science and Engineering 37 (2009) 110-116
Science and Technology 4 (2012), 2766-2772

Synthesis of Composite Materials Based Eggshell Reinforced with Silver Nanoparticles for Possible Biomedical Applications L.A.
The design and manufacture of cermet-type composite materials aims to obtain materials with physical, mechanical, and chemical properties that are better than those of their component materials.
Calcium-based ceramic composite materials, such as carbonates and phosphates, have made them the most prominent materials of this type since, for example, bones are mainly constituted of calcium.
It should be noted that the material formed after the sintering process is different from the materials of the green samples.
Guruprasad, Role of ceramic particulate reinforcements on mechanical properties and fracture behavior of aluminum - based composites, Materials Science and Engineering. 745 (2019) 252–264

Coleman, Monotonic and fatigue loading behavior of quasi-isotropic graphite/epoxy laminate embedded with piezoelectric sensor, Smart Materials and Structures, 7(1998) 822-826
Shin, A Study on The Change Between Tensile Loading and Natural Frequency of Carbon-Carbon Composite Materials, in 18th International Committee on Composite Materials (ICCM), Jeju Island, Korea: Ozden Ochoa, 2011
Callus, Delineation of structural damage from piezo-fibre-based sensor degradation, International Journal of Engineering Science and Technology (IJEST), 4(2012) 247-264
Coccia, Performance Assessment and Validation of Piezoelectric Active-Sensors in Structural Health Monitoring, Smart Materials and Structures, 15(2006) 1673-1683
Todd, Diagnostics for piezoelectric transducers under cyclic loads deployed for structural health monitoring application, Smart Materials and Structures, 22(2012) 1-11.