Results 31 to 40 of about 196,223 (392)
Development of water surface mobile garbage collector robot [PDF]
, 2021 This paper presents a prototype of Water Surface Mobile Garbage Collector Robot built in motivation to educate the people to love and monitor the health of our rivers by collecting the trash themselves using mobile robot.
Kamarudin, Nurul Anis Syahira +5 more
core +1 more source
Applied Sciences, 2019 Two series of rigid polyurethane-polyisocyanurate foams (RPU/PIR) modified by cinnamon extract (series C_0t and CU_0t) were obtained. One RPU/PIR series contained a commercial flame retardant (C_0t) in the formulation.
Joanna Liszkowska +5 more
doaj +1 more source
Science and Technology of Advanced Materials, 2020 We report the dynamic behavior of diselenide-containing hydrophilic polyurethanes and hydrogels based on diselenide exchange reactions in an aqueous media.
Hao Xu +6 more
doaj +1 more source
POLYURETHANE COMPOSITES AS DRUG CARRIERS:: RELEASE PATTERNS [PDF]
Biotechnologia Acta, 2013 Biodegradable polyurethanes attract interest of those developing composite materials for biomedical applications. One of their features is their ability to serve as carriers, or matrixes, for medicines and other bioactive compounds to produce a ...
M. V. Grigoreva
doaj +1 more source
ChemSusChem, 2019 With a global production of around 18 million tons (6th among all polymers) and a wide range of applications, such as rigid and soft foams, elastomers, coatings, and adhesives, polyurethanes (PUs) are a major polymer family.
Camille Carré +3 more
semanticscholar +1 more source
Thermal Stability of Aqueous Polyurethanes Depending on the Applied Catalysts
Sensors, 2006 The thermal stability of aqueous polyurethanes has been measured applying thethermogravimetric analysis. The aqueous polyurethanes (aqPUR) with catalysts of differentselectivity have been studied by use of the dynamic method.
Miroljub Barac +6 more
doaj +1 more source
A Brief Introduction to the Polyurethanes According to the Principles of Green Chemistry
Processes, 2021 Polyurethanes are most often called “green” when they contain natural, renewable additives in their network or chemical structure, such as mono- and polysaccharides, oils (mainly vegetable oils), polyphenols (e.g., lignins, tannins), or various compounds
J. Brzeska +1 more
semanticscholar +1 more source
Lignocellulosic Biomass as a Source of Raw Materials for the Synthesis of Polyurethanes
Proceedings, 2018 Precursors have been satisfactorily synthesized from lignocellulosic biomass for later use in the synthesis of polyurethanes resulting in competitive final properties with those of petroleum derived polyurethanes.
Tamara Calvo-Correas +6 more
doaj +1 more source
Influence of different polishing materials in the material removal of steel samples [PDF]
, 2018 The quality of injection moulded polymer optic parts depends on the surface finish of the respective mould. In order to improve and control the surface finish of the mould it is important to be able to keep the material removal constant during the ...
Almeida, Rui +3 more
core +2 more sources
Water Content and Thermoplastic Polyurethane Effects on Thrombosis Clotting [PDF]
, 2019 One of the main factors that can increase the chance of heart disease is unwanted blood clotting, or thrombosis. In addition, implantable biomaterials and/or medical devices are likely to trigger a series of adverse reactions that can lead to ...
Chou, Shih-Feng +3 more
core +1 more source