Searched for: subject%3A%22polymer%22
(1 - 20 of 228)

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Visschers, F.L.L. (author), Massaad, J. (author), van Neer, P.L.M.J. (author), Verweij, M.D. (author), Liu, D. (author), Broer, D.J. (author)
article 2022
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van Soestbergen, M. (author), Herrmann, A. (author), Erich, S.J.F. (author), Adan, O.C.G. (author)
The diffusivity of substances, such as moisture, through polymer composites is often described by an effective macroscopic quantity, even though microscopically the diffusivity might be far from uniform. In this work, we study the theoretical example of a permeable matrix containing equal-sized impermeable spheres. We assume that, due to...
article 2021
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Gomarasca, S. (author), Peeters, D.M.J. (author), Atli-Veltin, B. (author), Dransfeld, C. (author)
Understanding the three-dimensional variability of unidirectional composites is relevant to the material per formance and the development of advanced material modelling strategies. This work proposes a new method ology for the characterization of unidirectional composites, showcased on carbon fibre/poly(ether-ether-ketone) tapes. Three...
article 2021
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Valerio, O. (author), Muthuraj, R. (author), Codou, A.M.F.M.S. (author)
Polymers are one of the most versatile materials because oftheir excellent cost to performance ratio and durability. Thesereasons have driven the extensive usage of polymers in manycommon applications, and often, their lifespan exceeds theneeds of the application. This generates streams of polymerwastes which retain a substantial amount of their...
article 2020
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Waulthers, K. (author), van Zandvoort, R. (author), Castermans, S. (author), Welzen, J. (author), Baeten, E. (author), Stout, K. (author), Keul, H. (author), Mann, D. (author), Buskens, P. (author)
Reactive surfactants (surfmers), which are covalently attached to the surface of sub-micron sized polymer particles during emulsion polymerisation, are applied to tailor the surface functionality of polymer particles for an application of choice. We present a systematic study on the use of oligoglycidol-functionalised styrene macromolecules as...
article 2020
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van Neer, P. (author), Volker, A. (author), Berkhoff, A. (author), Schrama, T. (author), Akkerman, H. (author), van Breemen, A. (author), Peeters, L. (author), van der Steen, J.L. (author), Gelinck, G.H. (author)
Ultrasound based mid-air haptic feedback devices can produce tactile sensations at any time and position without restricting human motion. This is useful for augmented and virtual reality, feedback buttons and virtual user interfaces. The haptic feedback mechanism is caused by acoustic radiation force and streaming. Typical solutions to induce...
conference paper 2020
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Dogan, T. (author), Verbeek, R. (author), Kronemeijer, A.J. (author), Bobbert, P.A. (author), Gelinck, G.H. (author), van der Wiel, W.G. (author)
A unique vertical organic field-effect transistor structure in which highly doped silicon nanopillars are utilized as a gate electrode is demonstrated. An additional dielectric layer, partly covering the source, suppresses bulk conduction and lowers the OFF current. Using a semiconducting polymer as active channel material, short-channel (100 nm...
article 2019
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Voogt, B. (author), Huinink, H. (author), van de Kamp-Peeters, L. (author), Erich, S.J.F. (author), Scheerder, J. (author), Venema, P. (author), Adan, O.C.G. (author)
The hydroplasticization of coatings of acrylic copolymers with different amounts of methacrylic acid (MAA) was investigated to clarify the role of carboxylic acid functionalities on the change in polymer mobility due to water uptake. The coating T g as a function of water uptake was studied using dynamic mechanical analysis. The T g 's decreased...
article 2019
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Kuhnt, T. (author), marroquín García, R. (author), Camarero-Espinosa, S. (author), Dias, A. (author), ten Cate, A.T. (author), van Blitterswijk, C.A. (author), Moroni, L. (author), Baker, M.B. (author)
To exploit the usability of Digital Light Processing (DLP) in regenerative medicine, biodegradable, mechanically customizable and well-defined polyester urethane acrylate resins were synthesized based on poly(caprolactone-co-trimethlenecarbonate). By controlling the monomer ratio, the resultant fabricated constructs showed tunable mechanical...
article 2019
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Liu, M. (author), Cheng, Z. (author), Ganapathy, S. (author), Wang, C. (author), Haverkate, L.A. (author), Tułodziecki, M. (author), Unnikrishnan, S. (author), Wagemaker, M. (author)
In common hybrid solid electrolytes (HSEs), either the ionic conductivity of the polymer electrolyte is enhanced by the presence of a nanosized inorganic filler, which effectively decrease the glass-transition temperature, or the polymer solid electrolyte acts mostly as a flexible host for the inorganic solid electrolyte, the latter providing...
article 2019
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Yepes, C. (author), Gandini, E. (author), Dijk, R.V. (author), Bruning, F. (author), Maalderink, H. (author), Monni, S. (author), van Vliet, F.E. (author)
A 24 GHz antenna design for miniaturized FMCW radar is presented. The antenna was manufactured with additive manufacturing technology at TNO. The characterization of the polymer material used in the fabrication was carried out and the measurement results of the antenna are presented in this work. A good agreement between simulations and...
conference paper 2018
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Voogt, B. (author), Huinink, H. (author), Erich, S.J.F. (author), Scheerder, J. (author), Venema, P. (author), Adan, O.C.G. (author)
GARField 1H NMR relaxometry experiments were done to study the drying process of two latices with different polymer Tg and to elucidate water mobility behavior during this process. It was found that the hard type latex, with a polymer Tg above room temperature, dries faster than the soft type latex, with a polymer Tg below room temperature....
article 2018
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Slot, H.M. (author), IJzerman, R.M. (author), le Feber, M. (author), Nord-Varhaug, K. (author), van der Heide, E. (author)
Offshore wind turbine rotor diameters still increase. Blade tip velocities are up to 110 m/s, giving rise to more severe raindrop impact conditions and related erosion of the wind turbine blades. In the current work droplet impingement erosion tests were performed for injection moulded and compression moulded polybutylene terephthalate PBT. The...
article 2018
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Yepes, J.C. (author), Gandini, E. (author), van Dijk, R. (author), Bruning, F. (author), Maalderink, H. (author), Morini, S. (author), van Vliet, F.E. (author)
A 24 GHz antenna design for miniaturized FMCW radar is presented. The antenna was manufactured with additive manufacturing technology at TNO. The characterization of the polymer material used in the fabrication was carried out and the measurement results of the antenna are presented in this work. A good agreement between simulations and...
conference paper 2018
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Savikhin, V. (author), Babics, M. (author), Neophytou, M. (author), Liu, S. (author), Oosterhout, S.D. (author), Yan, H. (author), Gu, X. (author), Beaujuge, P.M. (author), Toney, M.F. (author)
Efficiencies of organic photovoltaic (OPV) devices have been steadily climbing, but there is still a prominent gap in understanding the relationship between fabrication and performance. Side chain substitution is one processing parameter that can change OPV device efficiency considerably, primarily because of variations in morphology. In this...
article 2018
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Fan, J.T. (author), Weerheijm, J. (author), Sluys, L.J. (author)
The deformation-to-fracture evolution of aflexible polymer material under high-strain-rate compressive loadingconducted by a split Hopkinson pressure bar (SHPB) setup was investigated. Representative tests were carriedout at different strain rate levels, followed by the characterization of dynamic damage after each test. Craze andcrack patterns...
article 2018
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Khanbareh, H. (author), de Boom, K. (author), van der Zwaag, S. (author), Groen, W.A. (author)
Tri-phase PZT-porous polyurethane (PU) composites are investigated with the aim of developing conformable, highly sensitive tactile sensors for application in Human-Machine Interactions. The main goal is to reduce the dielectric constant of the polymer matrix, and improve flexibility of traditional diphase piezo-composites, consisting of ceramic...
article 2017
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Khanbareh, H. (author), de Boom, K. (author), Schelen, B. (author), Scharff, R.B.N. (author), Wang, C.C.L. (author), van der Zwaag, S. (author), Groen, P. (author)
The need for flexible, highly sensitive tactile sensors that can fit onto curved surfaces is driving the conformable sensor materials research in the field of human–machine interactions. Here we report a new type of compliant piezoelectric active composite, a micro-porous polyurethane-PZT material, capable of generating a voltage output upon...
article 2017
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Valente, R. (author), de Ruijter, C. (author), Vlasveld, D. (author), van der Zwaag, S. (author), Groen, P. (author)
Conductive polymer composites have been receiving increased interest both from the scientific community and industry with a special focus on electromagnetic interference (EMI) shielding applications. In this paper, we present the design, EM wave simulation, and validation through S-parameters measurements of an EMI shielding effectiveness (SE)...
article 2017
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Khanbareh, H. (author), Hegde, M. (author), Bijleveld, J.C. (author), van der Zwaag, S. (author), Groen, P. (author)
High temperature ferroelectrics for thermally stable devices that can detect pressure and temperature are of great industrial interest. Here we describe composites of lead titanate (PT) particle-polyetherimide (PEI) polymers with stable dielectric and piezoelectric properties over a broad range of temperature and frequency. The reported...
article 2017
Searched for: subject%3A%22polymer%22
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