Impact of the hard‐segment concentration on highly resilient polyurethane foams based on palm olein polyol

Adnan, Srihanum; Noor, Maznee T. I. Tuan; Ain, Nurul H; Devi, Kosheela P. P.; Mohd, Norhisham S; Kian, Yeong Shoot; Idris, Zainab; Campara, Irma; Schiffman, Christi M.; Pietrzyk, Karol; Sendijarević, Vahid; Sendijarevic, Ibrahim

doi:10.1002/app.45440

Cited by 18 publications

(19 citation statements)

References 22 publications

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“…The calculation of tan δ resulted in a broad signal with no clear peak observable. Such more or less unusual trajectories have been observed in other studies dealing with PU foam as well [ 75 ]. The simultaneous presence of a chain extender and a cross-linker as well as of two different polyols differing in chain length led to the formation of a polymeric network with a broad length distribution of the chain segments between the netpoints.…”

Section: Resultssupporting

confidence: 73%

Shape Memory Polymer Foam with Programmable Apertures

et al. 2020

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In this work, a novel type of polyester urethane urea (PEUU) foam is introduced. The foam was produced by reactive foaming using a mixture of poly(1,10–decamethylene adipate) diol and poly(1,4–butylene adipate) diol, 4,4′-diphenylmethane diisocyanate, 1,4–butanediol, diethanolamine and water as blowing agent. As determined by differential scanning calorimetry, the melting of the ester-based phases occurred at temperatures in between 25 °C and 61 °C, while the crystallization transition spread from 48 °C to 20 °C. The mechanical properties of the foam were simulated with the hyperplastic models Neo-Hookean and Ogden, whereby the latter showed a better agreement with the experimental data as evidenced by a Pearson correlation coefficient R² above 0.99. Once thermomechanically treated, the foam exhibited a maximum actuation of 13.7% in heating-cooling cycles under a constant external load. In turn, thermal cycling under load-free conditions resulted in an actuation of more than 10%. Good thermal insulation properties were demonstrated by thermal conductivities of 0.039 W·(m·K)−1 in the pristine state and 0.052 W·(m·K)−1 in a state after compression by 50%, respectively. Finally, three demonstrators were developed, which closed an aperture or opened it again simply by changing the temperature. The self-sufficient material behavior is particularly promising in the construction industry, where programmable air slots offer the prospect of a dynamic insulation system for an adaptive building envelope.

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Section: Resultssupporting

confidence: 73%

Shape Memory Polymer Foam with Programmable Apertures

et al. 2020

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“…[15][16][17][18][19][20][21][22] Moreover, partial replacement of petroleum-based polyols with biobased polyols is an alternative approach for the preparation of polyurethane for applications such as coatings, adhesives, sealant, elastomer, as well as flexible and rigid foams. [23][24][25][26][27][28][29][30][31][32][33][34][35] The possibility of utilising castor oil and crude glycerol to produce bio-based polyols and subsequently RPUFs was explored by Carrico et al 5 Different amounts and types of blowing agent (water, pentane and cyclo-pentane) and catalyst (DBTDL) were examined in the study. Increase amount of water content resulted in a decrease in density, thermal conductivity, compressive strength and Young's modulus.…”

Section: Introductionmentioning

confidence: 99%

Low density rigid polyurethane foam incorporated with renewable polyol as sustainable thermal insulation material

Adnan

Noor

Devi

et al. 2022

Journal of Cellular Plastics

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Palm olein-based polyol (PP) was used as a partial replacement for commercial sucrose/glycerine initiated polyether polyol (GP) for the production of low density rigid polyurethane foams (RPUFs). The hydroxyl value (OHV) of the GP was 380 mg KOH/g, whereas the OHV for PP was 360 mg KOH/g. The RPUFs were prepared by replacing the GP with PP up to 50 parts per hundred parts of polyols (pph). Characterisation of the RPUFs, including density, compressive strength and strain, cell morphology and thermal conductivity ( k-value), were conducted. The dimensional stability of the foams was also evaluated. The study showed improvement in the compressive strength and strain for palm-based RPUFs with the incorporation of up to 30 pph PP as compared to GP foams. The lowest k-value (0.0232 W/m.K) of RPUF with density below 30 kg/m3 was obtained with the incorporation of 10 pph PP. This was due to the smallest and uniform pore size distribution observed using SEM images. The dimensional stability of the RPUF prepared from PP was within the acceptable range. Thus, the RPUFs made from PP are potential candidates to be used as insulation for refrigerators, freezers and piping.

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“…Adnan et al used bio-polyol based on palm-olein for the synthesis of high-resilient (HR) polyurethane foams. The conducted research showed that the implementation of vegetable-based polyol up to 25 wt.% did not have any influence on properties of the obtained materials [22].…”

Section: Introductionmentioning

confidence: 99%

Biodegradable, Flame-Retardant, and Bio-Based Rigid Polyurethane/Polyisocyanurate Foams for Thermal Insulation Application

et al. 2019

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This article raised the issue of studies on the use of new bio-polyol based on white mustard seed oil and 2,2’-thiodiethanol (3-thiapentane-1,5-diol) for the synthesis of rigid polyurethane/polyisocyanurate (RPU/PIR) foams. For this purpose, new formulations of polyurethane materials were prepared. Formulations contained bio-polyol content from 0 to 0.4 chemical equivalents of hydroxyl groups. An industrial flame retardant, tri(2-chloro-1-methylethyl) phosphate (Antiblaze TCMP), was added to half of the formulations. Basic foaming process parameters and functional properties, such as apparent density, compressive strength, brittleness, absorbability and water absorption, aging resistance, thermal conductivity coefficient λ, structure of materials, and flammability were examined. The susceptibility of the foams to biodegradation in soil was also examined. The increase in the bio-polyol content caused a slight increase in processing times. Also, it was noted that the use of bio-polyol had a positive effect on the functional properties of obtained RPU/PIR foams. Foams modified by bio-polyol based on mustard seed oil showed lower apparent density, brittleness, compressive strength, and absorbability and water absorption, as well as thermal conductivity, compared to the reference (unmodified) foams. Furthermore, the obtained materials were more resistant to aging and more susceptible to biodegradation.

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Impact of the hard‐segment concentration on highly resilient polyurethane foams based on palm olein polyol

Cited by 18 publications

References 22 publications

Shape Memory Polymer Foam with Programmable Apertures

Shape Memory Polymer Foam with Programmable Apertures

Low density rigid polyurethane foam incorporated with renewable polyol as sustainable thermal insulation material

Biodegradable, Flame-Retardant, and Bio-Based Rigid Polyurethane/Polyisocyanurate Foams for Thermal Insulation Application

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