Geosciences, 2021 This paper analyses the effect of polyurethane injections on the seismic surficial response of cohesionless soils. For this purpose, dynamic finite element numerical analyses were performed through GiD + OpenSees. Both the soil and the composite material,
Michele Placido Antonio Gatto +4 more
doaj +1 more source
Multiscale modeling of thermal properties in Polyurethane incorporated with phase change materials composites: A case study [PDF]
arXiv, 2023 Polyurethane (PU) is an ideal thermal insulation material due to its excellent thermal properties. The incorporation of Phase Change Materials (PCMs) capsules into Polyurethane (PU) has been shown to be effective in building envelopes. This design can significantly increase the stability of the indoor thermal environment and reduce the fluctuation of ...
arxiv
New research progress of vegetable oil-based polyurethanes
Journal of Hebei University of Science and Technology, 2016 This paper summarizes the latest progress for vegetable oil-based polyurethanes mainly from the view of thermoset and thermoplastic. Firstly, the modification methods for traditional thermoset polyurethane are introduced, including physical modification ...
Hongjie LIU +5 more
doaj +1 more source
Statistical properties of microcracking in polyurethane foams under tensile test, influence of temperature and density [PDF]
International Journal of Fracture 1-4, 140 (07/2006) 87, 2007 We report tensile failure experiments on polyurethane (PU) foams. Experiments have been performed by imposing a constant strain rate. We work on heterogeneous materials for whom the failure does not occur suddenly and can develop as a multistep process through a succession of microcracks that end at pores.
arxiv +1 more source
Photodegradation and self-healing in a Rhodamine 6G dye and Y$_2$O$_3$ nanoparticle-doped polyurethane random laser [PDF]
App. Phys. B 120, 1-12 (2015), 2015 One of the fundamental difficulties in implementing organic dyes in random lasers is irreversible photodegradation of the dye molecules, leading to loss of performance and the need to replace the dye. We report the observation of self-healing after photodegradation in a Rhodamine 6G dye and nanoparticle doped polyurethane random laser.
arxiv +1 more source
Study on the Properties of Silicon-Modified Polyurethane Anticorrosion Coating
Chemical Engineering Transactions, 2017 Polyurethane anticorrosion coating has been widely used as a metal coating material in recent years, but it has some shortcomings in hydrophobicity, heat resistance and hardness.
Liqin Yang +4 more
doaj +1 more source
Analytical modeling and experimentally optimizing synergistic effect on thermal conductivity enhancement of polyurethane nanocomposites with hybrid carbon nanofillers [PDF]
, 2020 Combining various carbon nanofillers with different dimensions can lead to a synergistic effect through the formation of an efficient conductive network. Hybrid polyurethane (PU) nanocomposites containing multi-walled carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) were fabricated to study experimental and theoretical aspects of thermal ...
arxiv +1 more source
Oxidation Behavior and Decomposition Kinetics of Mixed-Waste Biomass Material
BioResources, 2022 In Taiwan, approximately 379,000 automobiles and 588,000 motorcycles were recycled in 2019. Rigid polyurethane foam is one of the principal components of auto shredder residue. The amount of rigid polyurethane foam from the recycling of waste vehicles is
Po-Heng Lin +4 more
doaj +2 more sources
Developments of polyurethane in biomedical applications: A review
Resources Chemicals and Materials, 2023 Polyurethane is an excellent and widely used polymer material. In synthesizing polyurethane, the structure of soft and hard segments in polyurethane could be adjusted, which can obtain better properties than other polymer materials, such as good ...
Minghui Cui +4 more
doaj
Mechanical relaxation behavior of polyurethanes reinforced with the in situ-generated sodium silica-polyphosphate nanophase [PDF]
arXiv, 2014 Further exploration of hybrid organic/inorganic composites (polyurethane based with inorganic material sodium silica polyphosphate) properties with mechanical relaxometer gives ability to analyze microstructure of such materials in terms of chain reptation tubes filler's fractal aggregates and stress amplification.
arxiv