Search results

Introduction Polyethylene terephthalate (PET) is one kind of semi-crystalline polymer material, which can be used as fibers, films, functional materials and bottles because of its excellent mechanics, solvent resistance, heat resistance, electrical insulation, stiffness and so on.
After modification, the crystalline material changes to amorphous material, which can easily be stretched up to 4-5 times elongation and sustain the large deformation without release them after cooling down, which will lead to high shrinkage performance after heating again.
COC/PETG Film manufacture COC/PETG=30/70 blending materials mixed before entering into twin-extruder, then cooled down by use of cooling roll and receive the base film with thickness about 200micron.
Yagfarov : Polymer science USSR, Vol. 23 (1981), p. 2830-2838 [2].
Xu: Journal of Materials Science, Vol. 24 (2007), p. 6197-6204 [3].

Experimental Materials.
Results And Discussion TGA and DSC of PAE and SPAE hybrid materials.
Thermal properties of PAE and SPAE hybri- d materials as illustrated in fig.1.
FT-IR of PAE and SPAE hybrid materials.
[2] Wenbo Liao, Jinqing Qu, et al: Chinese Journal of Chemical Engineering Vol.18 (2010), p.156-163

Introduction Piezoelectric motor is the collection acoustics, mechanics, electronics, automatic control, tribological mechanism for the integration of the subject, compared with the traditional assolenoid style motor, piezoelectric motor has the following advantages : 1) Piezoelectric motor are more energy density; 2) Machinery with the output torque and low speed characteristics of the work; 3) According to the characteristics of piezoelectric materials, can output the micro displacement, can be used for precision positioning table driven; 4) Piezoelectric motor does not use the electromagnetic effect of the working principle; do not contain their magnetic elements.
In the design of motor parts in the process of piezoelectric, make full use of mathematical modeling and numerical simulation auxiliary optimization design, such as in computer to oscillator wave characteristics, frequency and speed relations, the power input the volume and speed simulation research, then determine the basic structure, motor piezoelectric materials, dimensions, such as design and production parameters.
Substrate materials choose 45 # steel, and the base board processing to ensure that the plane of the parallel degree and roughness.
Rely on piezoelectric equation and pre-tightening force equation analysis, incentive stress analysis for ceramic materials to meet the requirements of the low frequency drive the lower conditions, for ceramic material parameter selection to provide the reference.
References [1] YANG  Shuchen , LIU Jianfan , WANG Rui,The Theory of the Low Frequency Piezoelectric Motor Drive Foundation Research and Analysis, Journal of Jilin Teachers Institute of Engineering and Technology, 2011,27(5): 70-73 [2] GAO  Rui-rong  LI Zhi-hua,etc,Ultrasonic Motor  Driving Circuit  of The Piezoelectric with Design, Science, 2011,29: 113-114 [3] MA Yuting, ZHAO Juan, etc.Actuator with  Multiple  Tube Structure and Its Application to Piezoelectric Motors, Piezoelectrics ＆ Acoustooptics, 2010,32(4): 591-595 [4] QI Yong-yue, LIN Yu-chi,etc, Study on piezoelectric micro-motion stage at nanometer-scale, Transducer and Microsystem Technology,   2009,28(6): 53-55

The result shows that all films exhibit high absorbance properties in the UV range (<400nm) which indicate the suitability of nanostructured Al doped ZnO as a materials for UV photoconductive sensor application.
[3] Tae-Hyoung Moon, Min-Chang Jeong, Woong Lee, Jae-Min Myoung, Applied Surface Science 240 (2005) 280
Vaidyan, Materials Chemistry and Physics 58 (1999) 71
[6] Zikun Li, Xintang Huang, Jinping Liu, Yuanyuan Li, Guangyun Li, Materials Letters 62 (2008) 1503
Katiyar, Journal of Crystal Growth 287 (2006) 39.

Tencel is the environmental healthy material but the tencel processing is also carbonic can’t realize low emission production.
Low carbonic fashion design needs not only the innovations but the real conditions and social resources; this can be expressed in the following aspects: (1) Low carbonic design in clothes materials First of all, we insist on the use of green materials of cotton silk to get natural comfortable clothes.
Such ways give a new life to waste old clothes and endow the waste materials with new forms, thus the green ideas is popular in the people
When green fashion clothes is not only the substance material but also the expense symbol to meet the mental requires, the idea of low carbonic society would likely meet its target.
Science Journal 2011（4）337 [4] Ma qingyue, Fashion and Green—Expression and development of environmental view in clothes and fashion，43-45 [5] Cheng xiaoran，New ideas: low carbonic life of clothes Chinese fiber 2010（6）

All mentioned achievement has provided sufficient data and theory base for further study, however, most of these studies have followed the research path of cable materials, and also have little focus on partial discharge.
CSEE Journal of Power and Energy Systems, 2019, 5(1): 73-81
Journal of Nanomaterials, 2013, 2013(1): 1
Electrical Conduction and Carrier Traps in Polymeric Materials[J].
Materials, 2017, 10(1): 90.

Different material models produced drastically different results.
The material constants used in the cyclic plasticity theory can be seen in Ref. [1].
The decay of the wave depth rate is associated with the cyclic plasticity behavior of the material.
Senuma: ASME Journal of Lubrication Technology Vol. 103 (1981), p. 26 [3] K.L.
Li: Journal of Sound and Vibration Vol. 293 (2006), p. 830 [8] X.S.

In addition, the employment of biomass waste materials from agriculture could be an answer to the quest for a sustainable source of renewable energy.
The carbonization process of biomass waste from agriculture is a suitable, cost-effective technology for charcoal production in Thailand because the process adds value to the biomass raw materials which are inexpensive and ubiquitous.
Materials and methods The continuous microwave biomass carbonization system in this research is 7 meters in height and covers an area of 25 square meters.
Coconut shells cut into small chips of 2-4 cm in size were used in this experiment as the raw material.
Bridgwater, Renewable fuels and chemicals by thermal processing of biomass, Chemical Engineering Journal 91 (2003): 87–102

Experimental investigation Detailed descriptions of the materials and experimental methods used in this study are presented in the following sections. 1.1 Materials Cement(C): Onoda ordinary portland cement PO42.5R; Fine aggregate(S): river sand with fineness modulus of 2.7; Coarse aggregate(G): gravel and limestone with a nominal maximum size of 25 mm; Fly ash(FA): TypeⅠ; Silica fume(SF): SiO2≥92%, specific surface of 16800m2/kg; Polycarboxylate superplasticizer. 1.2 Concrete mix design The mix proportions of concrete are shown in Table 1 and the properties of fresh and hardened are shown in Table 2.
Richardson,in:Fundamentals of Durable Reinforced Concrete,London and New York,2002:38-50 [2] Tiejun Zhao,in:Concrete permeability[M].Beijing,China science press.1-4(in Chinese) [3] Standard Method for Sampling and Testing for Chloride Ion in Concrete and Concrete Raw Ma-terials (T260-94).American association of state highway and transportation officials,Washington D.C.
,U.S.A.,1994 [4] NT Build 355.Concrete,Mortar and Cement Based Repair Materials:Chloride Diffusion Coeffi-cient from Migration Cell Experiments,1997 [5] NT Build 492.Concrete,Mortar and Cement Based Repair Materials:Chloride Migration Coeffi-cient from Non-Steady-State Migration Cell Experiments,1999 [6] AASHTO Designation T277-83.
(in Chinese) [10] Lei Hong,Xiaodong Tang,in:Influence of freeze-thaw cycles on chloride permeability of high performance concrete [J],Journal of Wuhan University of Technology,2010,32(18):40-43.
(in Chin-ese) [11] Lei Hong , Chao Peng ,in:Influence of One-way Load and Freeze-Thaw Cycle on Chloride Permeability of High Performance Concrete[J],Journal of Building Materials, 2012,15(2):263-266.( in Chinese)

materials and methods A.
Experimental device In the test, BAF reactor was made of acrylic material.
ACKNOWLEDGMENT This work was financially supported by China Postdoctoral Science Foundation(20080440690), Ministry of Education Key Laboratory Fund Project of Hydro-science and engineering (SLK2008A01),The Mountain Road Construction,Maintenance Techniques, structure and the materials of Chngqing Jiaotong University Key Laboratory Opening Foundation(CQMRCM-09-3), Chongqing Municipal Education Commission of Science and Technology Research Project (KJ090402) and National Natural Science Fund of China (40871222).
Beijing: China Environmental Science Press, 2009. 193-199.
Chinese Journal of Environmental Engineering, 2008, vol.2(2): 220-224.