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Relevant bibliographies by topics / Thermosetting polymers

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Journal articles

Academic literature on the topic 'Thermosetting polymers'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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Journal articles on the topic "Thermosetting polymers"

1

Raman, Vijay I., and Giuseppe R. Palmese. "Nanoporous Thermosetting Polymers." Langmuir 21, no. 4 (2005): 1539–46. http://dx.doi.org/10.1021/la048393t.

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2

Bucaille, J. L., E. Felder, and G. Hochstetter. "Experimental and Three-Dimensional Finite Element Study of Scratch Test of Polymers at Large Deformations." Journal of Tribology 126, no. 2 (2004): 372–79. http://dx.doi.org/10.1115/1.1645535.

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An experimental and numerical study of the scratch test on polymers near their surface is presented. The elastoplastic response of three polymers is compared during scratch tests at large deformations: polycarbonate, a thermosetting polymer and a sol-gel hard coating composed of a hybrid matrix (thermosetting polymer-mineral) reinforced with oxide nanoparticles. The experiments were performed using a nanoindenter with a conical diamond tip having an included angle of 30 deg and a spherical radius of 600 nm. The observations obtained revealed that thermosetting polymers have a larger elastic recovery and a higher hardness than polycarbonate. The origin of this difference in scratch resistance was investigated with numerical modelling of the scratch test in three dimensions. Starting from results obtained by Bucaille (J. Mat. Sci., 37, pp. 3999–4011, 2002) using an inverse analysis of the indentation test, the mechanical behavior of polymers is modeled with Young’s modulus for the elastic part and with the G’sell-Jonas’ law with an exponential strain hardening for the viscoplastic part. The strain hardening coefficient is the main characteristic parameter differentiating the three studied polymers. Its value is equal to 0.5, 4.5, and 35, for polycarbonate, the thermosetting polymer and the reinforced thermosetting polymer, respectively. Firstly, simulations reveals that plastic strains are higher in scratch tests than in indentation tests, and that the magnitude of the plastic strains decreases as the strain hardening increases. For scratching on polycarbonate and for a penetration depth of 0.5 μm of the indenter mentioned above, the representative strain is equal to 124%. Secondly, in agreement with experimental results, numerical modeling shows that an increase in the strain hardening coefficient reduces the penetration depth of the indenter into the material and decreases the depth of the residual groove, which means an improvement in the scratch resistance.

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3

Lionetto, Francesca, Francesco Montagna, and Alfonso Maffezzoli. "Ultrasonic Dynamic Mechanical Analysis of Polymers." Applied Rheology 15, no. 5 (2005): 326–35. http://dx.doi.org/10.1515/arh-2005-0016.

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Abstract The propagation of ultrasonic waves in polymers depends on their viscoelastic behaviour and density, resulting significantly affected by phase transitions occurring with changing temperature and pressure or during chemical reactions. Therefore, the application of low intensity ultrasound, acting as a high frequency dynamic mechanical deformation applied to a polymer, can monitor the changes of viscoelastic properties associated with the glass transition, the crystallization, the physical or chemical gelation, the crosslinking. Thanks to the non-destructive character (due to the very small deformation amplitude), low intensity ultrasound can be successfully used for polymer characterization. Moreover, this technique has a big potential as a sensor for on-line and in-situ monitoring of production processes for polymers or polymer matrix composites. Recently, in the laboratory of Polymeric Materials of Lecce University a custom made ultrasonic set-up for the characterization of polymeric material, even at high temperatures, has been developed. The ultrasonic equipment is coupled with a rotational rheometer. Ultrasonic waves and shear oscillations at low frequency can be applied simultaneously on the sample, getting information on its viscoelastic behaviour over a wide frequency range. The aim of this paper is to present the potential and reliability of the ultrasonic equipment for the ultrasonic dynamic mechanical analysis (UDMA) of both thermosetting and thermoplastic polymers. Three applications of UDMA to different polymeric systems will be reviewed, concerning the cross-linking of a thermosetting resin, the crystallisation from melt of a semicrystalline polymer and the water sorption in a dry hydrogel film. From the ultrasonic velocity and attenuation measurements, the viscoelastic properties of the tested polymers are evaluated in terms of complex longitudinal modulus and compared with the results of conventional dynamic mechanical analysis, carried out at low frequency.

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4

Sharifi, M., C. W. Jang, C. F. Abrams, and G. R. Palmese. "Toughened epoxy polymers via rearrangement of network topology." J. Mater. Chem. A 2, no. 38 (2014): 16071–82. http://dx.doi.org/10.1039/c4ta03051f.

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A new toughening mechanism for thermosetting polymers is shown. The technique involves manipulation of polymer network topology allowing the glassy material to deform under loading without rupturing covalent bonds.

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5

Galià, Marina, Lucas Montero de Espinosa, Joan Carles Ronda, Gerard Lligadas, and Virginia Cádiz. "Vegetable oil-based thermosetting polymers." European Journal of Lipid Science and Technology 112, no. 1 (2010): 87–96. http://dx.doi.org/10.1002/ejlt.200900096.

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6

Hawtin, P. N., M. L. Abel, J. F. Watts, and J. Powell. "G-SIMS of thermosetting polymers." Applied Surface Science 252, no. 19 (2006): 6676–78. http://dx.doi.org/10.1016/j.apsusc.2006.02.123.

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7

Vashchuk, А., A. Fainleib, O. Starostenko, and D. Grande. "Ionic liquids and thermosetting polymers: a critical survey." Polymer journal 40, no. 1 (2018): 3–15. http://dx.doi.org/10.15407/polymerj.40.01.003.

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8

Zattini, Giorgio, Laura Mazzocchetti, Tiziana Benelli, Emanuele Maccaferri, Gianluca Brancolini, and Loris Giorgini. "Mechanical Properties and Fracture Surface Analysis of Vinyl Ester Resins Reinforced with Recycled Carbon Fibres." Key Engineering Materials 827 (December 2019): 110–15. http://dx.doi.org/10.4028/www.scientific.net/kem.827.110.

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This work is focused on the mechanical characterization and fracture surfaces analysis of thermosetting polymers reinforced with short, randomly oriented, recycled carbon fibres (rCFs). This work aims at evaluating fibre/matrix adhesion between recycled CFs - reclaimed via pyrolysis followed by controlled oxidation of the pyrolytic char - and different polymer matrices, namely epoxy and vinyl ester resins. The latter is the main focus in this work, being amongst the most widely used thermosetting resins in SMC processes, which are the typical target for short rCFs. The evaluation of the properties of this new recycled carbon fibre reinforced polymer (rCFRP) has been via thermogravimetric analysis, dynamic mechanical analysis, stress/strain tests in tensile mode, and a subsequent analysis of the fracture surfaces by means of images analysis obtained by macrophotography, Optical Microscopy and Scanning Electron Microscopy. The comparison amongst the results allowed to evaluate the influence of the polymer nature and of the adhesion quality between fibres and polymeric matrix, mainly on the mechanical properties of the rCFRPs.

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9

Hou, Meng. "Thermoplastic Adhesive for Thermosetting Composites." Materials Science Forum 706-709 (January 2012): 2968–73. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.2968.

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Technique of including a thermoplastic film as the outermost layer of thermoset composites have been developed as an attempt to join the thermoset composites using fusion bonding methods. Special thermoplastic in the form of film was incorporated onto the surface of thermoset composites during co-curing process. Semi-Interpenetration Polymer Network [s-IPN] was formed between thermoplastic and thermoset polymers. The thermoset composites can be fusion bonded using co-consolidation and localized heating through their incorporated thermoplastic surfaces. The mechanical properties of thermoset composites bonded with thermoplastic adhesive were equivalent or superior to the benchmark composites bonded with Cytec FM300K adhesive in terms of lap shear strength, high temperature, low temperature and anti-chemical resistance.

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10

Carfagna, C., E. Amendola, and M. Giamberini. "Liquid crystalline epoxy based thermosetting polymers." Progress in Polymer Science 22, no. 8 (1997): 1607–47. http://dx.doi.org/10.1016/s0079-6700(97)00010-5.

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