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16 articles for “Polyurethane foams”
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A Review of Fire Retardants for Commercially Important Polyurethane Foams
Abstract: The review covers various additive and reactive fire retardants used to render flexible and rigid polyurethane foams fire retardant. Literature sources are mostly from technical publications, patents, books and handbooks since 1962. Various fire retardants such as phosphorus-containing compounds, halogen-containing compounds, nitrogen-containing additives, silicone-containing products and miscellaneous organic and inorganic additives have been used to render polyurethane foams fire retardant. Some heatresistant groups such as carbodiimide, isocyanurate and nitrogen-containing heterocycles …
Published in Journal of Construction Engineering, Technology & Management · Vol. 3, Issue 3, 2013 · pp. 1–36 Read article
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Studies on Modelling of Mechanical Properties of Polyester-based Semi-rigid Polyurethane Foams
Abstract: This paper describes the mechanical behaviour of castor oil based semi rigid polyurethane foams with relative density below 0.05moulded by varying isocyanate index (Isocyanate equivalent/hydroxyl equivalent) from 1:1 to 1:2. Mechanical properties of polyurethane foam mainly compressive strength is measured experimentally and the values were compared using three widely referred theoretical models namely: (i) the Empirical model (ii) Gibson and Ashby approach widely used for foam description and (iii) modified …
Published in Journal of Polymer & Composites · Vol. 8, Issue 1, 2020 · pp. 77–86 Read article
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Investigation on Properties of Water and Methylene Chloride Blown Rigid Polyurethane Foam
Abstract: Physical properties are important parameters which influence the other properties and performance of rigid polyurethane foam (RPUF). Water and methylene chloride are the important ingredients of RPUF which act as blowing agents and influence the density, morphology and fire properties. RPUF samples were prepared from crude 4, 4’-diphenylmethane diisocyanate (CMDI), polyether polyol, triethylene diamine (TED), 1, 4-butane diol, polysiloxane ether, water and methylene chloride. RPUF with different densities were prepared …
Published in Journal of Polymer & Composites · Vol. 2, Issue 1, 2023 · pp. 46–54 Read article
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Evaluating the Mechanical Attributes of Flexible Polyurethane Foam Produced at Various Pressures
Abstract: This study explores the impact of different pressures (1atm and 0.75atm) on the mechanical characteristics of flexible polyurethane foam, employing varied compositions (0 - 40ppw) of CaCO3. Foam production occurred under two distinct pressure conditions: vacuum pressure and atmospheric conditions. Mechanical properties, including durability, compression set, resilience, support factor, elongation, hysteresis loss, bounce characteristics (including number of bounces), hardness, thickness loss value, elongation percentage, and tear resistance strength, were quantified …
Published in Journal of Polymer & Composites · Vol. 12, Issue 2, 2024 · pp. 59–74 Read article
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Numerical Prediction of Shear Modulus of Multi-Layer PUF Cored Sandwich Composites
Abstract: The present numerical investigation was mainly concerned with the evaluation of apparent shear modulus (Gc) of multi-layered polyurethane foam cored sandwich beams using a novel approach through the medium of general purpose program i.e. FEM/ANSYS. Aiming to the goal, three-point bending analysis was performed on sandwich beam models made up of composite face sheets and multi-layer polyurethane foam cores of different layer densities. Finite element models of sandwich beams were …
Published in Journal of Polymer & Composites · Vol. 5, Issue 3, 2017 · pp. 53–61 Read article
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Development of bio-based foam from Ximenia americana seed oil polyol: Studies on the effect of toluene diisocyanate (TDI) on some properties of the foam
Abstract: Polyurethane foam is a very important and valuable industrial product. In this study, polyol synthesized from Ximenia americana seed oil was used in the production of bio-based polyurethane foam. Different amounts (2mL, 4mL, 6mL, 8mL and 10mL) of toluene diisocyanate (TDI) were used in the formulation of the foams, and the effect of the varied amount of TDI was investigated by studying the foams’ properties such as the density, tensile …
Published in Emerging Trends in Chemical Engineering · Vol. 6, Issue 1, 2019 · pp. 5–11 Read article
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Evaluating the effects of different types of hand gloves and handle grip materials on hand-arm response while operating hand grinding machines
Abstract: Abstract The objective is to evaluate different hand gloves and handle grips of polyurethane materials on hand arm response while operating hand held grinding machines. The hand arm response was investigated in terms of fingertip force using FingerTPS systems. Cotton, Nylon and Leather gloves were initially evaluated for choosing the best, and further trials were conducted with that set of gloves and additional polyurethane foam handle grip of four densities. …
Published in Journal of Industrial Safety Engineering · Vol. 4, Issue 3, 2017 · pp. 10–23 Read article
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Low density polyurethane based antistatic coating for PU flexible foam for launch vehicles
Abstract: Polyurethane (PU) is a multi functional polymer prepared by using more than two types of monomers. The unique properties of PU come from monomers, thus broadening the applicability of PU in many different sectors. Furthermore, the antistatic property of PU coatings can be improved by the addition of conductive fillers into matrix thus broadening its application in the manufacture of electronic products, aerospace systems and daily necessities and so on. …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 12, Issue 2, 2025 · pp. 25–30 Read article
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Study and Analysis of Polymer / Composite Thermal Insulation Material and Comfort Based Building Simulation with Applicability of Evaporative Cooling
Abstract: In India, about 35% of India's electrical energy is absorbed by buildings. Of this, the significant consumption is for the cooling purpose in building. Passive cooling systems, by comparison consume considerably less energy than mechanical cooling systems. Therefore, it is very important to understand the applicability of the passive cooling system by conducting comfort-based simulation of building as well as an examination of the influence of thermal insulation composed of …
Published in Journal of Polymer & Composites · Vol. 9, Issue 2, 2021 · pp. 21–29 Read article
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Effectiveness of Polyurethane Handle Grip Materials on Hand Arm Vibration while Operating Hand Grinding Machines
Abstract: The objective of this study is to evaluate the effectiveness of handle grips of polyurethane materials of different densities on hand arm vibration while operating hand held grinding machines. The hand arm vibration was analyzed in terms of fingertip force, using FingerTPS systems. Polyurethane foam handle grips of thickness 4 mm, of four densities were chosen for the study. Thirteen healthy male subjects consisting of students and professionals were involved …
Published in Journal of Industrial Safety Engineering · Vol. 4, Issue 1, 2017 · pp. 21–30 Read article
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Behavior of Sandwich Composites under Edgewise and Flatwise Compression; Effect of Variation of Fibre Architecture and Core Density
Abstract: The present paper is focused on the fabrication of foam–cored sandwich composites using manual hand layup technique and testing under in-plane compression. The sandwich construction comprises of polyurethane foams of five varied densities with E-glass fibre in vinylester resin as face sheets. Four different varieties of E-glass fibre are used. As compression properties are of critical importance during the design of lightweight structures, an attempt is made to study the …
Published in Journal of Materials & Metallurgical Engineering · Vol. 5, Issue 1, 2015 · pp. 18–35 Read article
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Low Velocity Impact Behaviour of Corrugated Foam Sandwich Panel
Abstract: Composite sandwich structures, renowned for their high flexural stiffness and low weight, are widely used across industries such as aerospace, automotive, and marine. However, their durability can be compromised by impact-related damages, which affect both the core and face sheets. This study explores the performance of corrugated sandwich panels compared to conventional designs under low-velocity impacts. Using a drop weight impact testing machine, panels made from polyurethane foam cores and …
Published in Journal of Polymer & Composites · Vol. 13, Issue 6, 2025 · pp. 79–99 Read article
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Polymer-Based Acoustic Composite Materials for Urban Noise Mitigation: Design, Performance and Legal Integration
Abstract: This study explores the development and use of polymer-based acoustic composite materials for effective urban noise mitigation, wherein the performance of the materials is linked to legal compliance frameworks. Rapid urbanization has intensified noise pollution from transportation, industrial activity, and construction, posing a serious threat to public health and environmental quality. Although regulatory standards exist, their implementation is often limited due to inadequate technical interventions. This research focuses on advanced …
Published in Journal of Polymer & Composites · Vol. 14, Issue 3, 2026 · pp. 403–412 Read article
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Precast Airport Lane Analysis of Military Air Base Using ANSYS
Abstract: This report describes the technology of using precast concrete panels for the repair of concrete pavements. The objective of the study was to assess the state-of-technology and to identify implementation challenges. The repair of concrete pavements using precast concrete panels may be an effective alternative to cast-in-place repairs, because it can reduce construction time and provide durable pavements. Construction costs of repairs using precast panels are typically higher than the …
Published in Trends in Transport Engineering and Applications · Vol. 7, Issue 2, 2020 · pp. 38–45 Read article
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Flexural Characterization of Sandwich Composites; Effect of Varying PU Foam Density and E-Glass Fabric on Flexural Strength
Abstract: AbstractThis paper presents the results of an extensive investigation on flexural behavior and failure mechanisms of sandwich composites with polyurethane (PU) foam core and glass reinforced vinylester as facesheet. The sandwich structures with PU foam of varied density and glass fibres of different architecture are tested under three point bending. The experimental values of face bending strength (FBS) and core shear stress (CSS) are evaluated. Effect of core density and …
Published in Journal of Polymer & Composites · Vol. 2, Issue 2, 2023 · pp. 29–43 Read article
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Tung Oil Based Polyurethanes: A Short Review
Abstract: Polyurethane (PU) formulated from natural polyols obtained from Tung oil (TO) have improved hydroxylation of the double bonds in the fatty acid chains of the unsaturated oil followed by the alcoholysis of the hydroxylated oil. The comparative chemical analysis between unmodified and modified TO suggested that the hydroxyl content increased significantly after the hydroxylation and alcoholysis reactions. Incorporated wood flour (WF), microcrystalline cellulose (MCC) or rice husk ash (RHA) as …
Published in Journal of Polymer & Composites · Vol. 3, Issue 3, 2015 · pp. 43–47 Read article