Restricted accessResearch articleFirst published online 2022-1
The effect of organofluorine additives on the morphology,thermal conductivity and mechanical properties of rigid polyurethane and polyisocyanurate foams
This study investigates the effect of liquid-type organofluorine additives (OFAs) on the morphology, thermal conductivity and mechanical properties of rigid polyurethane (PU) and polyisocyanurate (PIR) foams. Foams were characterized in terms of their morphology (density, average cell size, anisotropy ratio, open cell content), thermal conductivity and compressive as well as flexural properties. Based on the results, we observed that OFAs efficiently reduced the average cell size of both PU and PIR foams, leading to improved thermal insulating and mechanical properties.
KimJTKimBKKimEY, et al. Synthesis and shape memory performance of polyurethane/graphene nanocomposites. React Funct Polym2014; 74: 16–21.
2.
AgarwalSGuptaRK.The use of thermosets in the building and construction industry. In: GuoQ (ed.) Thermosets structure, properties, and applications. Elsevier: Amsterdam, 2017, pp 279–300.
3.
ModestiMLorenzettiA.An experimental method for evaluating isocyanate conversion and trimer formation in polyisocyanate-polyurethane foams. Eur Polym J2001; 37: 949–954.
4.
ThirumalMKhastgirDSinghaNK, et al. Effect of foam density on the properties of water blown rigid polyurethane foam. J Appl Polym Sci2008; 108: 1810–1817.
5.
SeoWJParkJHSungYT, et al. Properties of water‐blown rigid polyurethane foams with reactivity of raw materials. J Appl Polym Sci2004; 93: 2334–2342.
6.
WangSXZhaoHBRaoWH, et al. Inherently flame-retardant rigid polyurethane foams with excellent thermal insulation and mechanical properties. Polymer2018; 153: 616–625.
7.
SungCHLeeKSLeeKS, et al. Sound damping of a polyurethane foam nanocomposite. Macromol Res2007; 15: 443–448.
8.
BandarianMShojaeiARashidiAM.Thermal, mechanical and acoustic damping properties of flexible open-cell polyurethane multi-walled carbon nanotube foams: effect of surface functionality of nanotubes. Polym Int2011; 60: 475–482.
9.
ChenSZhuWChengY.Multi-objective optimization of acoustic performances of polyurethane foam composites. Polymers2018; 10: 788–801.
SinghHJainAK.Ignition, combustion, toxicity, and fire retardancy of polyurethane foams: a comprehensive review. J. Appl Polym Sci2009; 111: 1115–1143.
12.
Dominguez-RosadoELiggatJJSnapeCE, et al. Thermal degradation of urethane modified polyisocyanurate foams based on aliphatic and aromatic polyester polyol. Polym Degrad Stab2002; 78: 1–5.
13.
RandallDLeeS. and In The polyurethanes book. Wiley: New Jersey, 2003, pp.113–126.
LimHKimSHKimBK.Effects of the functionality of polyol in rigid polyurethane foams. J Appl Polym Sci2008; 110: 49–54.
16.
BanikISainMM.Water‐blown soy polyol based polyurethane foams modified by cellulosic materials obtained from different sources. J Appl Polym Sci2009; 112: 1974–1987.
17.
EinhornINSeaderJDDrakeWO, et al. Polyisocyanurate foams. Polym Eng Sci1972; 12: 167–178.
18.
ChenLBlizardKStraffR, et al. Effect of filler size on cell nucleation during foaming process. J Cell Plast2002; 38: 139–148.
19.
BaserSAKhakharDV.Modeling of the dynamics of R-11 blown polyurethane foam formation. Polym Eng Sci1994; 34: 632–641.
20.
SeoWJJungHCHyunJC, et al. Mechanical, morphological, and thermal properties of rigid polyurethane foams blown by distilled water. J Appl Polym Sci2003; 90: 12–21.
21.
WangJZhangZJiangQ, et al. A novel bubble nucleation particle for magnesium composite foam. Mater Lett2017; 193: 187–190.
22.
StrachotaAStrachotováBŠpírkováM.Comparison of environmentally friendly selective polyurethane catalysts. Mater Manuf Processes2008; 23: 566–570.
23.
RandallDLeeS.The polyurethanes book. Wiley: New Jersey, 2003, pp.151–167.
24.
HanMSChoiSJKimJM, et al. Effects of silicone surfactant on the cell size and thermal conductivity of rigid polyurethane foams by environmentally friendly blowing agents. Macromol Res2009; 17: 44–50.
25.
BaferaniAHKeshavarzRAsadiM, et al. Effects of silicone surfactant on the properties of Open-Cell flexible polyurethane foams. Adv Polym Tech2018; 37: 21643.
26.
MichaeliWHeinzR.Foam extrusion of thermoplastic polyurethanes (TPU) using CO2 as a blowing agent. Macromol Mater Eng2000; 284-285: 35–39.
27.
KashchievD.Nucleation Basic Theory with Applications. Elsevier: Amsterdam, 2000, pp.9–16.
28.
KangJWKimJMKimMS, et al. Effects of nucleating agents on the morphological, mechanical and thermal insulating properties of rigid polyurethane foams. Macromol Res2009; 17: 856–862.
29.
LeeYJangMGChoiKH, et al. Liquid‐type nucleating agent for improving thermal insulating properties of rigid polyurethane foams by HFC‐365mfc as a blowing agent. J Appl Polym Sci2016; 133: 43557.
30.
ASTM D1622/D1622M-14. Standard Test method for apparent density of rigid cellular plastics.
31.
D6226-15 ASTM. Standard test method for open cell content of rigid cellular plastics.
32.
ISO 32191993. Plastics-polymers/resins in the liquid state or as emulsions or dispersions – determination of viscosity using a rotational viscometer with defined shear rate.
33.
D3576-15 ASTM. Standard test method for cell size of rigid cellular plastics.
34.
PintoJSolórzanoERodriguez-PerezMA, et al. Characterization of the cellular structure based on user-interactive image analysis procedures. J Cell Plast2013; 49: 555–575.
35.
UE. 126672002. Thermal performance of building materials and products.
36.
UE. 8262013. Determination of compression behavior of thermal insulation products.
37.
ISO 12092007. Rigid cellular plastics – determination of flexural properties.
38.
Laguna-GuterriezEHooghtenRVMoldenaersP, et al. Effects of extrusion process, type and content of clays, and foaming process on the clay exfoliation in HMS PP composites. J Appl Polym Sci2015; 132: 42828.
39.
GibsonLJAshbyMF.Cellular solids: structure and properties. New York: Pergamon Press, 1988, pp.283–294.
40.
Alvarez-LainezMRodriguez-PerezMADe SajaJA.Thermal conductivity of open‐cell polyolefin foams. J Polym Sci B Polym Phys2008; 46: 212–221.
41.
WuJWSungWFChuHS.Thermal conductivity of open-cell polyolefin foams. Int J Heat Mass Transfer1999; 42: 2211–2217.
42.
GibsonLJAshbyMF.Cellular solids: structure and properties. New York: Pergamon Press, 1988, pp.183–216.
43.
DavariMRazaviAMKSerajiSM.Relationship between the cell structure and mechanical properties of chemically crosslinked polyethylene foams. J Appl Polym Sci2012; 124: 2789–2797.
44.
Rodríguez-PérezMAGonzález-PeñaJWittenN, et al. The effect of cell size on the physical properties of crosslinked closed cell polyethylene foams produced by a high pressure nitrogen solution process. J Cell Polym2002; 21: 165–194.
45.
EsmaeilnezhadERezaeiMRazaviMK.The effect of alternative blowing agents on microstructure and mechanical characteristics of rigid polyurethane foam. Iran Polym J2009; 18: 569–579.
