scholarly journals Evaluating the Properties of a Coating Material with Polycaprolactone-Degradable Fluorinated Silicon-Containing Waterborne Polyurethane

2020 ◽  
Vol 12 (9) ◽  
pp. 3745 ◽  
Author(s):  
Yao-Tang Hsu ◽  
Wen-Hsin Wang ◽  
Wei-Hsi Hung
Keyword(s):  
Thermal Stability ◽  
Tensile Strength ◽  
Functional Groups ◽  
Tensile Testing ◽  
Testing Machine ◽  
Measurement Instrument ◽  
Gel Permeation Chromatography ◽  
Waterborne Polyurethane ◽  
Angle Measurement ◽  
Tensile Testing Machine

This study successfully synthesized fluorinated silicon-containing waterborne polyurethanes (FSWPUs) by using polycaprolactone (PCL) diol, 2,2,3,3-Tetrafluoro-1,4-butanediol, and [3-(2-Aminoethylamino)propyl] trimethoxysilane (AEAPTES ). The FSWPU’s particle size was examined using dynamic light scattering. After the FSWPUs were processed into a dry film, their molecular weight and basic properties were analyzed using gel permeation chromatography (GPC), Fourier-transform infrared spectroscopy (FTIR), and energy-dispersive X-ray spectroscopy (EDS). Additionally, the thermal stability of the FSWPUs was inspected by thermogravimetric analysis and dynamic mechanical analysis. The tensile strength and elongation at the break of the FSWPUs before and after hydrolysis were also analyzed, using a tensile testing machine. Subsequently, FSWPU emulsions were cast between the tiles, and hydrophilicity, hydrophobicity, and surface tension were then measured on a contact-angle measurement instrument. The tensile testing machine was again employed to test the sheer strength of the FSWPUs between the tiles, and a tape test was conducted to analyze their adhesion to the tiles. The results revealed that AEAPTES functional groups can reinforce the thermal stability, tensile strength, and water resistance of FSWPUs. Moreover, the AEAPTES functional groups increased the adhesion of FSWPUs to the tiles and reduced the surface energy of the tiles.

Research of the Mechanical Properties of the Filament from the Percentage of Filling when Prototyping Machine Parts

2021 ◽  
Vol 410 ◽  
pp. 617-623
Author(s):  
Elena N. Gryadynova ◽  
Andrey V. Gorin ◽  
Alexey Yu. Rodichev
Keyword(s):  
Tensile Strength ◽  
Tensile Testing ◽  
Testing Machine ◽  
Experimental Studies ◽  
Relative Deformation ◽  
Strain Diagram ◽  
Experimental Sample ◽  
Tensile Testing Machine ◽  
Machine Parts ◽  
Fisher’S Criterion

The article contains the analysis of thermoplastics used in prototyping machine parts. We used several types of experimental samples with different filling percentages. The equipment on which the experimental studies were carried out is shown. During the experiment, a specialized tensile testing machine was used. The experimental samples were installed in the developed centering device. Normal conditions were observed during the tests. The results of an experimental tensile study of PLA-plastic specimens are presented. The typical stress-strain diagram of an experimental sample is described, which describes the dependence of stress on relative deformation. An equation of the linear dependence of the tensile strength on the percentage of filament filling has been compiled, which makes it possible to determine the tensile strength of the product at any percentage of the filling of the plastic filament. The assessment is adequately verified by Fisher's criterion. Recommendations for filament filling in prototyping machine parts are given.

Preparation and Property of Waterborne Polyurethane Waterproofing Composites

2013 ◽  
Vol 477-478 ◽  
pp. 1184-1186
Author(s):  
Yan Ping Wang ◽  
Xiao Lei Su ◽  
Yong Sheng Tan ◽  
Kai Li Zhao ◽  
Yin Hu Qu
Keyword(s):  
Compressive Strength ◽  
Tensile Testing ◽  
Raw Materials ◽  
Testing Machine ◽  
Waterborne Polyurethane ◽  
Distilled Water ◽  
Tensile Testing Machine ◽  
Compression Performance

Waterborne polyurethane waterproofing composite has been prepared using polyurethane emulsion, cement, sand, and distilled water as raw materials, respectively. The compression performance of the samples has been determined by tensile testing machine. The microstructure of the samples has been observed by metallographic microscope. At the same time, the water resisting property of samples has been presented. The result shows that the surface of samples becomes the more smoothing with the increase ratio of cement to sand. The best compressive strength and water resisting property have been obtained when the weight of polyurethane emulsion to distilled water was 1:5 and the ratio of sand to cement was 2.1:1.

Effect of Coarse-Grained Ring on Mechanical Properties and Cutting Performance of 2011 Aluminum Alloy Extruded Bar

2021 ◽  
Vol 1035 ◽  
pp. 114-118
Author(s):  
Chang Liang Shi ◽  
Yan Ping Niu ◽  
Yi Min Lin ◽  
Quan Hu ◽  
Xin Zhang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Tensile Testing ◽  
High Speed ◽  
Testing Machine ◽  
Eutectic Phase ◽  
Cutting Performance ◽  
Coarse Grained ◽  
Tensile Testing Machine

The effects of coarse-grained ring on the mechanical properties and cutting performance of 2011 aluminum alloy extruded bars were studied by metallographic microscope, scanning electron microscope, tensile testing machine and high-speed lathe. The results show that the microstructure of aluminum alloy extruded bar was composed of α-Al phase, Al7Cu2Fe phase, CuAl2 phase and SnBi eutectic phase. There was a coarse-grained ring in the aluminum alloy extruded bar. The coarse-grained ring reduced the mechanical properties and cutting performance of the aluminum alloy extruded bar. The aluminum alloy extruded bar with a diameter of 30 mm had a coarse-grained ring depth of 9 mm and lower mechanical properties, whose the tensile strength was 287.9 MPa, the elongation was 17%, the cutting performance was poor and the chips were long. The aluminum alloy extruded bar with a diameter of 40 mm had a coarse-grained ring depth of 1 mm, higher mechanical properties and better cutting performance, whose the tensile strength was 394.5 MPa, the elongation was 23.5%, the chips were fine and uniform.

scholarly journals Biomechanical and Dimensional Measurements of the Pulvertaft Weave Versus the Cow-Hitch Technique

Hand ◽  
2016 ◽  
Vol 12 (1) ◽  
pp. 78-84 ◽  
Author(s):  
Nanette L. A. Vincken ◽  
Thomas M. A. S. Lauwers ◽  
Rene R. W. J. van der Hulst
Keyword(s):  
Tensile Strength ◽  
Ultimate Strength ◽  
Tensile Testing ◽  
Statistical Difference ◽  
Adhesion Formation ◽  
Testing Machine ◽  
Digital Analysis ◽  
Tensile Testing Machine ◽  
Dimensional Measurements ◽  
Biomechanical Strength

Background: In this study, biomechanical strength and bulkiness of the cow-hitch technique and Pulvertaft weave were compared. Our goal was to investigate whether the cow hitch can withstand equal strength in comparison with the Pulvertaft and to see if there is a difference in bulk, which could enhance gliding function and reduce friction and adhesion formation. Methods: Sheep tendons were used to perform 10 cow-hitch and 10 Pulvertaft repairs. Tensile strength was obtained with a cyclic loading tensile testing machine and tendon width and height measurements were obtained through digital analysis by photographs of the repairs. Results: The cow hitch showed significantly better ultimate strength and had less bulk. There was no statistical difference in displacement, defined as gain in total length of the tendon. Conclusions: The results in this study show that the cow hitch outperforms the Pulvertaft weave in both ultimate strength and bulk.

scholarly journals Design and Implementation of a Tensile Testing Machine

2020 ◽  
Vol 13 (1) ◽  
pp. 50-53
Author(s):  
Hunor Fábián ◽  
Attila Gergely
Keyword(s):  
Tensile Strength ◽  
Manufacturing Process ◽  
Tensile Testing ◽  
Testing Machine ◽  
Polymeric Materials ◽  
Tensile Testing Machine ◽  
Design And Implementation ◽  
Mechanical Part ◽  
Design And Manufacturing ◽  
Stepper Motors

AbstractThe aim of this paper is to present the design and manufacturing process of a tensile testing machine capable of measuring the tensile strength of polymeric materials. The structure of the instrument is similar to that used in the industry; however, it is budget friendly. The instrument consists of a frame, and two screws which are driven by two stepper motors. An Arduino is used to control the mechanical part of the instrument and to connect it to the software.

The Effect of Temperature on the Tensile Properties of Steel 0Cr18Ni9

2010 ◽  
Vol 654-656 ◽  
pp. 194-197
Author(s):  
Wei Fen Li ◽  
Wei Niu ◽  
Zhi Ming Hao ◽  
Ming Hai Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Yield Strength ◽  
Tensile Properties ◽  
Tensile Testing ◽  
Testing Machine ◽  
Effect Of Temperature ◽  
Tensile Testing Machine ◽  
Increasing Temperature

Experiments of tensile mechanical properties of steel 0Cr18Ni9 are done on the MTS 810 tensile testing machine, and the temperature range is from 20°C to 1200°C. The stress vs. strain curves are obtained. Results show that the elastic modulus, yield stress and tensile strength decrease with increasing temperature .Based on the experiment results, the functions of the elastic modulus, yield strength and tensile strength versus temperature are represented by polynomial.

Increased Suture Embedment in Tendons: An Effective Method to Improve Repair Strength

2002 ◽  
Vol 27 (4) ◽  
pp. 333-336 ◽  
Author(s):  
B. WANG ◽  
J. B. TANG
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Ultimate Strength ◽  
Tensile Testing ◽  
Testing Machine ◽  
Gap Formation ◽  
Tensile Testing Machine ◽  
Flexor Tendons ◽  
Important Contributor ◽  
Complete Failure

We evaluated the effect of length of suture embedment within tendons on the tensile strength of repaired tendons. Thirty fresh pig flexor tendons were divided into three groups and subjected to repairs with the Halsted tendon sutures in which 1/3, 1/2, and 2/3 of the length of the longitudinal sutures was embedded within the tendons. The repaired tendons were pulled to complete failure by an Instron tensile testing machine. The 2 mm gap-formation force, ultimate strength, stiffness, and energy to failure were greatest when 2/3 of the suture length was embedded within the tendon. The results indicate that suture embedment is an important contributor to the tensile properties of the repair, and that increase in length of suture embedment is an effective way to strengthen tendon repairs.

Effects of La and Ce Mixed Rare Earth on Microstructure and Properties of Al-Mg-Si Aluminum Alloy

2017 ◽  
Vol 898 ◽  
pp. 367-371 ◽  
Author(s):  
Shun Cheng Wang ◽  
Nan Zhou ◽  
Dong Fu Song ◽  
Deng Nong
Keyword(s):  
Electrical Conductivity ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Rare Earth ◽  
Eddy Current ◽  
Tensile Testing ◽  
Testing Machine ◽  
Tensile Testing Machine ◽  
Microstructure And Properties ◽  
Positive Effect

The effects of La and Ce mixed rare earth on the microstructure and properties of Al-0.75Mg-0.6Si alloy were studied by optical microscopy, digital eddy current conductive instrument and tensile testing machine. Results showed that the addition of La and Ce mixed rare earth had a positive effect on the grain refinement of Al-0.75Mg-0.6Si alloy, which is beneficial to improve the electrical conductivity and strength. With increasing the additive amount of La and Ce mixed rare earth, the electrical conductivity, tensile strength and elongation of Al-0.75Mg-0.6Si alloy gradually increased. When the additive amount of La and Ce mixed rare earth increased to 0.5%, the electrical conductivity of Al-0.75Mg-0.6Si alloy was 55.7% IACS, the tensile strength and elongation of Al-0.75Mg-0.6Si alloy were 236 MPa and 16.7%, respectively. The electrical conductivity increased by 5.7%, tensile strength and elongation increased by 11.3% and 15.2% compared with that of Al-0.75Mg-0.6Si alloy without adding the La and Ce mixed rare earth.

Use of a Durometer to Assess Onion Bulb Hardness

1978 ◽  
Vol 14 (3) ◽  
pp. 269-272 ◽  
Author(s):  
J. F. M. Fennell
Keyword(s):  
Tensile Testing ◽  
Test Procedure ◽  
Testing Machine ◽  
Onion Bulb ◽  
Tensile Testing Machine ◽  
Varietal Differences ◽  
Onion Bulbs ◽  
Non Destructive

SUMMARYThe use of a durometer to assess hardness of onion bulbs is described, and compared with the use of a tensile testing machine. Results from the two tests were closely correlated, and significant varietal differences were detected in bulb hardness by both machines. The durometer is of particular value because of the simplicity and non-destructive nature of the test procedure.

A tensile testing machine for thin films

1972 ◽  
Vol 5 (12) ◽  
pp. 1231-1232 ◽  
Author(s):  
C A O Henning ◽  
F W Boswell ◽  
J M Corbett
Keyword(s):  
Thin Films ◽  
Tensile Testing ◽  
Testing Machine ◽  
Tensile Testing Machine
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