Studying a Flexible Polyurethane Elastomer with Improved Impact-Resistant Performance

Fan, Jihui; Chen, Ang

doi:10.3390/polym11030467

Cited by 36 publications

(19 citation statements)

References 55 publications

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“…The second part corresponds to the stretching deformation of the cell faces. The experimental results provide good agreement with the predictive data for the closedcell foams for 0.6 < Φ < 0.8 12,22,34 For 0D and 1D the experimental result is very close to the model's predictive data, but for 2D and 3D the experimental value is higher than the predictive value. The relatively higher value can be attributed to the fact that the cell-edges are strengthened by the 2D and 3D nanofillers.…”

Section: Tensile Modulussupporting

confidence: 66%

“…The tensile modulus as well as strength, in general, of carbon nanotube reinforced polymer nanocomposites are found to increase with CNTs loading, alignment, distribution and dispersion in the matrix. However, the results at low CNTs concentrations typically remain far behind the theoretical predictions from the rule of mixtures, Takayanagi's model, 46 Gibson Ashby Model 12,22,34 and the Halpin-Tsai model. 21 For example, tensile modulus of polyethylene fiber was found to improve from 0.65 to 1.25 GPa at 5 wt% SWNTs (aspect ratio 380) loading.…”

Section: Tensile Modulusmentioning

confidence: 95%

“…The relatively higher value can be attributed to the fact that the cell-edges are strengthened by the 2D and 3D nanofillers. Also the higher fraction of solid mass of the cell-edges are due to the mass drive out from the cell walls to the edges because of surface tension 34 However, the cell faces are found relatively thick in some cases and the value of Φ is in the range Φ = 0.01-0.7. 12 It is required to mention that the measured values are sometimes over estimated by the Equation (9).…”

Section: Tensile Modulusmentioning

confidence: 99%

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Interfacial interactions and properties of cellular structured polyurethane nanocomposite based on carbonaceous nano‐fillers

Mandal

Roy

Prasad

et al. 2020

J of Applied Polymer Sci

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In this article, we have studied the effect of carbonaceous nanofillers viz. fullerenol (0D), carboxylated multi-wall carbon nanotube (MWCNT, 1D), hydroxylated graphene (2D) and combination of carboxylated CNT and hydroxylated graphene as 3D in thermoplastic polyurethane on the tensile properties of the fabricated cellular structures. The concentration of nano-fillers was varied as 0.1, 1, and 5 wt%. Tensile properties of the nanocomposite cellular structures were measured as per ASTM D882 at 20 C (below glass transition temperature, T g) and 40 C (above T g). The results have shown that the tensile strength was found to increase by 200%-300% and the tensile modulus was found to increase by 150%-300% for 2D and 3D nano-fillers while significantly poor results were observed for 0D. However, the test data tensile strength and modulus showed marginal increase at 20 C and marginally low at 40 C for 1D filler. The interfacial adhesion was calculated by using experimental tensile data and the predictive models. The interfacial adhesion parameter (B σ) calculated using Pukanszky equation was found significantly higher value for 2D (B σ20 = 195.8) and 3D (B σ20 = 192.0) fillers while poor adhesion was observed for 0D (B σ20 = −81.6) fillers. The developed cellular structured materials were also evaluated by attenuated total reflection Fourier transform IR spectra, differential scanning calorimetry, X-ray diffraction, scanning electron microscope, and transmission electron microscope. K E Y W O R D S foams, graphene and fullerenes, mechanical properties, microscopy, nanotubes, surfaces and interfaces 1 | INTRODUCTION Polyurethane (PU) is an elastic and flexible polymer and is used in adhesives, coatings, medical devices, sealants, and thermoplastic elastomers. 1 Polymer foams which are made of skeleton of more or less regular closed or open cells are popularly used in the industry. They have high energy shock absorption capacity, acoustic and thermal insulating properties, filtering applications, 2 and so forth. They are also widely used in automobile, aircraft industry, buildings and packaging. 2 The foams of PUs are used as insulating and core materials for cooling, furniture, and freezing systems, shipbuilding, in house building, 3 and so forth. The use of rigid foams is due to their low

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Section: Tensile Modulussupporting

confidence: 66%

Section: Tensile Modulusmentioning

confidence: 95%

Section: Tensile Modulusmentioning

confidence: 99%

See 1 more Smart Citation

Interfacial interactions and properties of cellular structured polyurethane nanocomposite based on carbonaceous nano‐fillers

Mandal

Roy

Prasad

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

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“…In most modified composites, the strength is enhanced, while the elongation is sacrificed. However, there are many applications that require both sufficient rigidity and ductility, such as for energy absorption purposes [21,22].…”

Section: Introductionmentioning

confidence: 99%

Flexure Behaviors of ABS-Based Composites Containing Carbon and Kevlar Fibers by Material Extrusion 3D Printing

Wang

Rao

et al. 2019

Polymers

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Short-fiber-reinforced thermoplastics are popular for improving the mechanical properties exhibited by pristine thermoplastic materials. Due to the inherent conflict between strength and ductility, there are only a few successful cases of simultaneous enhancement of these two properties in polymer composite components. The objective of this work was to explore the feasibility of simultaneous enhancement of strength and ductility in ABS-based composites with short-carbon and Kevlar fiber reinforcement by material extrusion 3D printing (ME3DP). Microstructure characterization and measurement of thermal and mechanical properties were conducted to evaluate the fiber-reinforced ABS. The influence of printing raster orientation and build direction on the mechanical properties of material extrusion of 3D-printed composites was analyzed. Experimental results demonstrated that the reinforcement of the ABS-based composites by short-carbon and Kevlar fibers under optimized 3D-printing conditions led to balanced flexural strength and ductility. The ABS-based composites with a raster orientation of ±45° and side build direction presented the highest flexural behaviors among the samples in the current study. The main reason was attributed to the printed contour layers and the irregular zigzag paths, which could delay the initiation and propagation of microcracks.

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“…During the following inverse parameter identification, the order of the polynomial model is taken as 2 in order to appropriately describe material behaviors of the polyurea and limit the number of material parameters. The second-order strain energy function is (7) where C 10 , C 01 , C 20 , C 11 , and C 02 are material parameters that need to be identified.…”

Section: Constitutive Model For Polyureamentioning

confidence: 99%

Inverse Parameter Identification for Hyperelastic Model of a Polyurea

2021

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An inverse procedure was proposed to identify the material parameters of polyurea materials. In this procedure, a polynomial hyperelastic model was chosen as the constitutive model. Both uniaxial tension and compression tests were performed for a polyurea. An iterative inverse method was presented to identify parameters for the tensile performance of the polyurea. This method adjusts parameters iteratively to achieve a good agreement between tensile forces from the tension test and its finite element (FE) model. A response surface-based inverse method was presented to identify parameters for the compression performance of the polyurea. This method constructs a radial basis function (RBF)-based response surface model for the error between compressive forces from the compression test and its FE model, and it employs the genetic algorithm to minimize the error. With the use of the two inverse methods, two sets of parameters were obtained. Then, a complete identified uniaxial stress–strain curve for both tensile and compressive deformations was obtained with the two sets of parameters. Fitting this curve with the constitutive equation gave the final material parameters. The present inverse procedure can simplify experimental configurations and consider effects of friction in compression tests. Moreover, it produces material parameters that can appropriately characterize both tensile and compressive behaviors of the polyurea.

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Studying a Flexible Polyurethane Elastomer with Improved Impact-Resistant Performance

Cited by 36 publications

References 55 publications

Interfacial interactions and properties of cellular structured polyurethane nanocomposite based on carbonaceous nano‐fillers

Interfacial interactions and properties of cellular structured polyurethane nanocomposite based on carbonaceous nano‐fillers

Flexure Behaviors of ABS-Based Composites Containing Carbon and Kevlar Fibers by Material Extrusion 3D Printing

Inverse Parameter Identification for Hyperelastic Model of a Polyurea

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