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Virtual poster session

Thermal conductivity of polyisocyanurate foams (PIR) produced using hydrofluoroolefins (HFOs) as blowing agents

Wednesday (07.10.2020)
18:58 - 19:01 Room 1
Part of:
Line-Up:
18:40 Virtual poster session Development of CFRP - hybrid foam composites for improved light-weight design of electric vehicles 1 Joachim Baumeister
18:43 Virtual poster session Study of the thermal conductivity of powdered microcellular polymers based on PMMA 1 Ph.D. Ismael Sánchez
18:46 Virtual poster session Manufacturing of functional aluminium matrix syntactic foams 1 Alexandra Kemény
18:49 Virtual poster session Manufacturing and comparison of AlSi12 matrix unimodal and bimodal syntactic metal foams 1 Borbála Leveles
18:52 Virtual poster session The effect of elastomer viscosity in pp/poe foams produced by core-back injection moulding over impact properties 1 Ph.D. Santiago Muñoz Pascual
18:55 Virtual poster session Modelling of the mechanisms of heat transfer in glass foams at different temperatures 1 Paula Cimavilla-Román
18:58 Virtual poster session Thermal conductivity of polyisocyanurate foams (PIR) produced using hydrofluoroolefins (HFOs) as blowing agents 1 Ph.D. Patricia Torres
19:01 Virtual poster session Multiscale modeling of biopolymer aerogels 1 Dr.-Ing. Ameya Rege
19:04 Virtual poster session On the way to mass production of unit-cell based auxetic materials 1 Angela Schwarz
19:07 Virtual poster session Wavy knits – enabling the production of auxetic materials 1 Angela Schwarz
19:10 Virtual poster session Influence of Sample Size on Dynamic Compression of Metal Syntactic Foams 1 Nima Movahedi
19:13 Virtual poster session Synthesis of new non-isocyanate polyurethane foams based on cyclic triscarbonates and diamines 1 Ph.D. Mercedes Santiago-Calvo
19:16 Virtual poster session Formation of monodisperse surfactant foams 1 Prof. Dr. Rumen Krastev
19:19 Virtual poster session Analysis of a AlMg2.5 matrix syntactic foam produced via thixoinfiltration of loosely packed and micro structured recycled balloons 1 João Paulo Paschoal
19:22 Virtual poster session In-situ observation of combustion foaming process for synthesizing porous Al3Ti by X-ray radioscopy 1 Takamasa Inukai
19:25 Virtual poster session Characterization of 3D printed PHBV+BG scaffolds for bone regeneration 1 Prof. Dr. Elida B. Hermida
19:28 Virtual poster session Rheology of a hydrogel-ink, printing fidelity and elastic behavior of 3D-printed scaffolds 1 Prof. Dr. Elida B. Hermida
19:31 Virtual poster session Keratinocytes hacat proliferation on 3D-printed chitosan-collagen scaffolds 1 Prof. Dr. Elida B. Hermida
19:34 Virtual poster session The microhardness and microstructure studies on the sintered open-cell nickel foam 0 Faeze Barzegar
19:37 Virtual poster session Characterization of porous titanium implants produced by 3D printer technique 0 Dr. Akram Salehi
19:40 Virtual poster session Adapting polymer derived ceramic membranes for emulsification process 1 Natália Cristina Fontão
19:43 Virtual poster session Poster discussion in video chat rooms 0
Session Chair


Session V.1: Session 1
Belongs to:
General Topic V: Virtual poster session


Today, rigid foams based on polyurethanes are a fundamental part of our lives, as they are used in a wide range of applications. Inside this group of materials polyisocyanurate foams (PIR)are considered an improved solution, due to its resistance to fire and high temperatures. The raw materials and formulations used are similar to those used in the production of polyurethane, except that the proportion of isocyanate (MDI) is higher and the polyol used is a polyester.

Hydrofluoroolefins (HFOs) are unsaturated organic compounds comprising of hydrogen, fluorine and carbon. Unlike traditional hydrofluorocarbons (HFCs) and chlorofluorocarbons (CFCs), which are saturated, HFOs are olefins, otherwise known as alkenes. HFOs are being developed as "fourth generation" refrigerants with extremely low global-warming potential which is 0.1% of HFCs. HFO products have short atmospheric lifetimes and are categorized as having zero ODP (Ozone Depletion Potential) and low GWP (Global Warming Potential), providing a more environmentally friendly alternative to CFCs, HCFCs and HFCs. In addition, these blowing agents are non-inflammable.

PIR foams are used in many fields, both in construction for ceilings and walls and in ventilation and heating systems. Nowadays, these foams are most of times produced at industrial scale using hydrocarbons such as different isomers of pentane (isopentane, cyclopentane, n-pentane), but the use of HFOs seems to be a promising alternative for these materials because a lower thermal conductivity could be obtained together with an improved flame retardancy.

In this work, polyisocyanurate foams were synthesized with different types of blowing agents (isopentane, cyclopentane, HFOs, n-pentane and methylal). The effects of the type of blowing agent on the foaming process, cellular structure and changes in thermal conductivity have been analyzed exploring the advantages of using HFOs in comparison with other alternatives.

Speaker:
Ph.D. Patricia Torres
University of Valladolid
Additional Authors:
  • Prof. Dr. Miguel Ángel Rodriguez Peréz
    Universidad de Valladolid
  • Dr. Mercedes Santiago Calvo
    Universidad de Valladolid

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