Polymer Mechanical Properties via a New Laboratory Tensile Tester

Gilmer, T. Carter; Williams, Matthew A.

doi:10.1021/ed073p1062

Cited by 10 publications

(12 citation statements)

References 1 publication

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“…The tensile testing is simply placing a specimen under tension until failure. Tensile experiments have been used to train students (McCormick, 1975;Gilmer & Williams, 1996) and clear guidance on the procedure for testing of polymers have been given (Gilmer & Williams, 1996).…”

Section: Tensile Testing Of Plasticsmentioning

confidence: 99%

An Introduction To Conventional Tensile Testing: Constructionism Approach For Constructivism Learning

Darko

Zadoroshnyj

2021

ESJ

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Constructivism learning theory recommends the act of allowing students to create knowledge through their experiences. Very often, it is difficult to build such an investigative framework within material science laboratory sessions that assist students in acquiring the knowledge. This paper focuses on the use of constructivism principles that was established by a constructionism process to allow students acquire cognitive knowledge through manual calculation and manipulation of measured data from a tensile testing experiment. Using a conventional tensile laboratory testing, undergraduate material science students succeeded in using their self-acquired skills to determine the toughness of the plastics, the elastic modulus, yield stress and strains, and the ultimate stresses from the measured graphs. The students were also able to describe the deformation mechanisms involved even though the focus was not on the accuracy of the results. This paper reinforces the need to involve constructivism principles in material science teaching that enhances the learner's knowledge acquisition.

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Section: Tensile Testing Of Plasticsmentioning

confidence: 99%

An Introduction To Conventional Tensile Testing: Constructionism Approach For Constructivism Learning

Darko

Zadoroshnyj

2021

ESJ

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“…The ability to characterize such deformations distinctly demonstrates the wide applicability of this device to a broad range of materials and thus a wide range of fields and disciplines. 1,16 We believe that this mechanical tester is an ideal tool for project-based learning. We tested six different materials in order to determine the differences among them and validate the device.…”

Section: Journal Of Chemical Educationmentioning

confidence: 99%

Fabrication of an Economical Arduino-Based Uniaxial Tensile Tester

2017

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The mechanical properties of soft materials are critically important for a wide range of applications ranging from packaging to biomedical purposes. We have constructed a simple mechanical testing apparatus using off-the-shelf materials and open-source software for a total cost of less than $100. The device consists of a wooden frame supporting a central loading apparatus attached via drawer slides. To perform a mechanical test, a sample is secured within two custom-made 3D-printed clamps affixed to brackets on the base of the frame and the load cell. The extension force is applied by the user pulling on a rope, moving the central loading apparatus up (thereby stretching the sample) while recording the force (measured by a load cell) and the displacement (measured by an ultrasonic sensor). The load cell and ultrasonic sensor are linked to an Arduino microcontroller connected to a laptop through a USB port for data acquisition and analysis. This instrument was easy to assemble and enabled students to better grasp the meaning of tensile testing while promoting experimentation with electronics, computer programming, and mechanical design. Because of its low cost and ease of use, this Arduino-based uniaxial tensile tester can be an ideal device to introduce the concepts of mechanical properties, among other concepts, to students in numerous fields.

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“…The Mooney-Rilvin equation can be applied to both unswollen and swollen rubbers. For unswollen rubbers, such equations are based on the phenomenological theory of rubber elasticity [27,28] which can be obtained as follows.…”

Section: Theory Determination Of Crosslink Densitymentioning

confidence: 99%

Dynamic mechanical, mechanical and thermal analysis of CPI/NBR blends: effect of blend composition and crosslink density

et al. 2015

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Blends of cis-polyisoprene (CPI) and nitrile butadiene rubber (NBR) in different volume ratio were prepared to see the effect of composition on different properties. Structure characterization has been done through X-ray diffraction and scanning electron microscope. Scanning electron micrographs confirm homogeneous nature of all the blends. The dynamic mechanical analyzer was used to measure damping, storage modulus, glass transition temperature and mechanical properties (Young's modulus and tensile strength) of these blends. Activation energy and fragility were determined for the non-Arrhenius (fragile) behavior of viscosity using Vogel-Fulchuer-Tammann (VFT) equation. Thermal conductivity has been analyzed through thermal constant analyzer. Results indicate that all the measured properties are dependent on blend composition and crosslink density.

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Polymer Mechanical Properties via a New Laboratory Tensile Tester

Cited by 10 publications

References 1 publication

An Introduction To Conventional Tensile Testing: Constructionism Approach For Constructivism Learning

An Introduction To Conventional Tensile Testing: Constructionism Approach For Constructivism Learning

Fabrication of an Economical Arduino-Based Uniaxial Tensile Tester

Dynamic mechanical, mechanical and thermal analysis of CPI/NBR blends: effect of blend composition and crosslink density

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