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Stegmann, P.H. (author), Gerritse, T. (author), Shen, L. (author), Londo, M. (author), Puente, A. (author), Junginger, M. (author)Biomass use and recycling are among the few options to reduce the greenhouse gas (GHG) emissions of the growing plastics sector. The bio-based plastic polyethylene furanoate (PEF) is a promising alternative to polyethylene terephthalate (PET), in particular for small bottle applications. For the first time, we assessed the life cycle global...article 2023
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Schwarz, A.E. (author), Lensen, S.M.C. (author), Langeveld, E. (author), Parker, L.A. (author), Urbanus, J.H. (author)Knowledge on environmental plastic emission and spatial and temporal accumulation is vital for the development of successful mitigation strategies and risk assessments of plastics. In this study, emissions of both micro and macro plastic from the plastic value chain to the environment were assessed on a global level through a mass flow analysis ...article 2023
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Obers, S.F.P.M. (author), Overal, J.J. (author), Wong, W.J. (author), Walters, C.L. (author)Application of high-strength steels in the maritime and offshore industry is currently limited by rules governing the ratio of the yield to tensile strength (the Y/T ratio). To better understand the physical basis for these rules, the nature and extent of the plastic stress/strain field in the vicinity of a stress concentration (a circular hole)...article 2022
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Wong, W.J. (author), Walters, C.L. (author)High-strength steel beams are known to have less plastic rotation capacity than beams with lower yield strengths. This has been related to the decreased strain-hardening ability of high-strength steels, and various rules and standards for steel structures stipulate maximum limits on the allowable yield-to-tensile strength ( y/ u)ratio, which...conference paper 2022
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Shahmohammadi, M.S. (author), Parker, L.A. (author), Henke, S. (author), Urbanus, J.H. (author)Microplastics are a growing environmental and toxicological concern, having been found in the remotest locations of the earth and within multiple organs of the human body. However, the scale of the problem is not yet fully known as the smallest micro- and nanoplastics (MNPs) cannot accurately be measured due to limitations in measurement and...article 2022
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Golkaram, M. (author), Mehta, R. (author), Taveau, M. (author), Schwarz, A. (author), Gankema, H. (author), Urbanus, J.H. (author), de Simon, L. (author), Cakir-Benthem, S. (author), van Harmelen, T. (author)One of the key challenges for plastics in a circular economy is its degradation during use, washing and reprocessing. The reduced quality of recycled plastic waste leads to its use in inferior applications. This study presents a novel quality model which incorporates degradation, degree of mixing and contaminations. The model estimates a single...article 2022
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- Mehta, R. (author) public lecture 2022
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Singh, A. (author), Fokker, P.A. (author)This work is an extension of the time-resolved poro-elasto-plastic MohrCoulomb model by Fokker et al to include a more realistic constitutive model. Experiments on Slochteren sandstone revealed that the inelastic deformation contributes significantly in compressive deformation almost in all stages of loading and instigated the development of a...article 2021
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- Hussein, A. (author), Krom, A.H.M. (author), Dey, P. (author), Sunnardianto, G.K. (author), Moultos, O.A. (author), Walters, C.L. (author) article 2021
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Schwarz, A.E. (author), Ligthart, T.N. (author), Godoi Bizarro, D.E. (author), de Wild, P.J. (author), Vreugdenhil, B.J. (author), van Harmelen, A.K. (author)To ensure a circular economy for plastics, insights in the environmental impacts of recycling and optimal recycling choices for specific plastic polymers are crucial. This was obtained by determining the environmental performance of 10 selected recycling technologies with varying TRL levels, using the chemical properties of the top 25 produced...article 2021
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Schwarz, A. (author), de Ruiter, R. (author), Zondervan, E. (author), van Eijk, F. (author), Huybrechts, L. (author)With this brochure Holland Circular Hotspot and TNO bring their insights to the international level and share best practices with the hope that it will inspire everyone around the world to take action and kickstart circular development.other 2021
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- Golkaram, M. (author), Mehta, R. (author) other 2021
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- Golkaram, M. (author), Mehta, R. (author) public lecture 2021
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Vollmer, I. (author), Jenks, M.J.F. (author), Roelands, M.C.P. (author), White, R.J. (author), van Harmelen, T. (author), de Wild, P. (author), van der Laan, G.P. (author), Meirer, F. (author), Keurentjes, J.T.F. (author), Weckhuysen, B.M. (author)Increasing the stream of recycled plastic necessitates an approach beyond the traditional recycling via melting and re-extrusion. Various chemical recycling processes have great potential to enhance recycling rates. In this Review, a summary of the various chemical recycling routes and assessment via life-cycle analysis is complemented by an...article 2020
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Wijngaard, M. (author), Dortmans, A. (author), van Harmelen, T. (author), Urbanus, J.H. (author), de Ruiter, R. (author), Schwarz, A. (author), Zondervan, E. (author)Plastics (bulk, coatings, and glues), like many other commodities, including metal, wood, glass, and ceramics, are of essential importance to the wellbeing of today’s society. This will not be any different in the decades to come. We expect plastics to remain important due to their unique properties and the possibilities for mass production...other 2020
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Maljaars, J. (author), Tang, L. (author)Crack closure effects during fatigue crack growth have been studied by many researchers with the finite element method, but appears difficult to accurately predict. Although quantification of crack closure may be a bridge too far, finite element models may help explaining observations from tests and give insight into trends. This paper studies...article 2020
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Leonetti, D. (author), Snijder, H.H. (author), Maljaars, J. (author)Two basic procedures are currently available to determine the critical condition of a flawed structure, at which unstable crack extension may occur. The first method based on elastic-plastic fracture mechanics is accurate but requires a time consuming elastic-plastic finite element analysis. The second method estimates the critical condition...conference paper 2019
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- van Emmerik, T. (author), Schwarz, A. (author) article 2019
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Schwarz, A.E. (author), Ligthart, T.N. (author), Boukris, E. (author), van Harmelen, T. (author)Types of plastic waste in different aquatic environments were assessed to obtain a global framework of plastic waste transport and accumulation, relevant for plastic pollution mitigation strategies in aquatic environments. Packaging and consumer products were the most encountered product categories in rivers, while fishery items dominated in the...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