Dynamic Mechanical Analysis

Menard, Kevin P.; Menard, Noah R.

doi:10.1002/9780470027318.a2007.pub3

Cited by 43 publications

(33 citation statements)

References 134 publications

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“…The maximum value of tan δ is called the glass transition temperature ( T g ). The storage modulus of the polymers decreases with temperature while the loss modulus and tan δ rise to the maximum when the temperature approaches the glass transition temperature ( T g ) . In the present work, the storage modulus and tan δ of pure PVA and its composites with CNPs are plotted against temperature ranging from 100 to 150°C.…”

Section: Resultsmentioning

confidence: 99%

Carbon nanoparticles/polyvinyl alcohol composites with enhanced optical, thermal, mechanical, and flame‐retardant properties

Zahid

Ali

Saleem

et al. 2020

J of Applied Polymer Sci

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In this work, polyvinyl alcohol (PVA) is chemically bonded to carbon nanoparticles (CNPs) by a very simple and versatile solution casting method. Five different kinds of CNPs/PVA composite films were prepared; 0.5, 1.0, 1.5, 2.0, and 3.0 wt% CNPs dispersed in PVA. The as‐prepared samples were characterized using various characterization techniques. The resulting nanocomposites proved to possess homogeneity and better mechanical, thermal, optical, and flame‐retardant properties than pure PVA. Most of the CNPs with average particle size ≤100 nm were homogeneously dispersed in the PVA matrix showing fluorescence in the violet color zone. The crystallinity of the nanocomposites show a decline in the diffraction intensity as compared to pure PVA which results from the dwelling of CNPs inside the gaps of stacked‐layer chains of PVA. The mechanical properties of nanocomposites indicated enhancement in toughness, elastic modulus and tensile strength with an increase in CNPs contents. The assessment for flame‐retardant properties was carried out through cone calorimetry. The results show a decrease in both total heat release rate (THRR) and peak heat release rate (pHRR) of the resulting nanocomposites as compared to pure PVA. The superior properties of the CNPs/PVA composites stemmed from the good interfacial bonding between the CNPs and PVA matrix.

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Section: Resultsmentioning

confidence: 99%

Carbon nanoparticles/polyvinyl alcohol composites with enhanced optical, thermal, mechanical, and flame‐retardant properties

Zahid

Ali

Saleem

et al. 2020

J of Applied Polymer Sci

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“…These viscoelastic properties of polymers, such as the tire tread compound, are usually determined by means of Dynamic Mechanical Analysis (D.M.A.). This method requires testing a polymeric specimen of suitable dimension within a frequency range from 0.1 Hz to 100 Hz [5]. Furthermore, the D.M.A.…”

Section: Viscoelastic Properties and Characterization Methodsmentioning

confidence: 99%

“…The Dynamic Mechanical Analysis (D.M.A.) is widely employed into the characterization of viscoelasticity in order define the hysteretic behaviour of the compound following the Time-Temperature Superposition principle [5]. On one hand, this testing approach perfectly fits with polymer specimens manufactured with specific dimension for the D.M.A.…”

Section: Introductionmentioning

confidence: 99%

Development of an Innovative Instrument for Non-destructive Viscoelasticity Characterization: VESevo

Farroni

Genovese

Maiorano

et al. 2020

Mechanisms and Machine Science

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The evaluation of the viscoelastic properties is a key topic for the analysis of the dynamic mechanical behaviour of polymers. In vehicle dynamics field, the knowledge of the viscoelasticity of tread compound is fundamental for tire-road contact mechanics modelling and friction coefficient prediction for the improvement of vehicle performance and safety, i.e. motorsport field. These properties are usually characterised by means of Dynamic Mechanical Analysis, which implies testing a compound sample obtained by destroying the tire of interest or a slab manufactured in different conditions respect to the final product provided by tiremakers. In this scenario, the non-destructive procedures are an advantageous solution for the analysis of the tread viscoelasticity, without affecting the tire integrity, allowing a great number of tests in the shortest possible time. For this reason, the authors propose an innovative instrument, called VESevo, for viscoelasticity evaluation by means of non-destructive and user-friendly technique. The purpose of the following work is the preliminary analysis of the dynamic response of the tires tested employing the VESevo in order to determine viscoelastic behaviour indexes for mechanical properties evaluation.

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“…DMA measurements can be performed for various loading types. Basics of the DMA are well described in David (1999) and Menard and Menard (2017). In brief, during the measurement a sinusoidal force is applied to the sample, which results to a sinusoidal deformation.…”

Section: Dynamic Mechanical Analysismentioning

confidence: 99%

Mechanical Testing of Vascular Grafts

Stoiber

Grasl

Moscato

et al. 2020

Tissue-Engineered Vascular Grafts

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Beside other requirements, the mechanical behavior plays an important role in the success of vascular grafts. For the development, quality control, and assessment of vascular grafts, precise and predictive mechanical characterization is essential. Today's technology offers a wide range of mechanical tests for various applications. The selection of the proper test method out of these numerous options is a challenging task, because different scientific questions and issues require different testing methods. In this chapter, an overview and review of important methods with numerous relevant references for the mechanical characterization of vascular grafts is given. In addition, a classification of the testing methods according to the measurement purpose is presented. Special attention is paid to dynamic measurement techniques, which are more close to the target application. Challenges and possibilities of these measurement methods are demonstrated and discussed. This shall form a basis to assess one's own needs and to help at the selection process to find the most suitable testing methods.

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Dynamic Mechanical Analysis

Cited by 43 publications

References 134 publications

Carbon nanoparticles/polyvinyl alcohol composites with enhanced optical, thermal, mechanical, and flame‐retardant properties

Carbon nanoparticles/polyvinyl alcohol composites with enhanced optical, thermal, mechanical, and flame‐retardant properties

Development of an Innovative Instrument for Non-destructive Viscoelasticity Characterization: VESevo

Mechanical Testing of Vascular Grafts

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