Open-cell flexible polyurethane foams: Comparison of static and dynamic compression properties

1985 ◽  
Vol 30 (1) ◽  
pp. 333-343 ◽  
Author(s):  
R. W. Shuttleworth ◽  
V. O. Shestopal ◽  
P. C. Goss
Keyword(s):  
Dynamic Compression ◽  
Polyurethane Foams ◽  
Open Cell ◽  
Compression Properties ◽  
Flexible Polyurethane

scholarly journals Effects of Silicone Surfactant on the Properties of Open-Cell Flexible Polyurethane Foams

2016 ◽  
Vol 37 (1) ◽  
pp. 71-83 ◽  
Author(s):  
A. Hasani Baferani ◽  
R. Keshavarz ◽  
M. Asadi ◽  
A. R. Ohadi
Keyword(s):  
Polyurethane Foams ◽  
Open Cell ◽  
Silicone Surfactant ◽  
Flexible Polyurethane

scholarly journals Thiol-Ene Coupling of High Oleic Sunflower Oil towards Application in the Modification of Flexible Polyurethane Foams

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 628
Author(s):  
Sylwia Dworakowska ◽  
Adrien Cornille ◽  
Dariusz Bogdal ◽  
Bernard Boutevin ◽  
Sylvain Caillol
Keyword(s):  
Sunflower Oil ◽  
Click Reaction ◽  
Thermomechanical Properties ◽  
Polyurethane Foams ◽  
High Oleic Sunflower Oil ◽  
High Oleic ◽  
Compression Properties ◽  
Ft Ir ◽  
Flexible Polyurethane ◽  
Polyether Polyol

High oleic sunflower oil-based polyol was obtained by thiol-ene coupling and applied in the preparation of flexible polyurethane foams. The photochemically initiated thiol-ene click reaction was carried out under UV irradiation using 2-mercaptoethanol. Bio-based polyol with hydroxyl value of 201.4 mg KOH/g was used as 30 wt% substituent of petrochemical polyether polyol in the formulations of flexible foams. Both reference foams, as well as foams modified with bio-based polyol, were formulated to have various isocyanate indices (0.85, 0.95, 1.05). Flexible foams were compared in terms of their thermomechanical properties and analyzed using FT-IR and SEM microscopy. Modification with bio-based polyol resulted in foams with superior compression properties, higher support factor, and lower resilience than reference foams. TGA and FT-IR curves confirmed the presence of urethane/urea and ether linkages in the polyurethane matrix. Moreover, double glass transition temperature corresponding to soft and hard segments of polyurethane was observed by DSC proving the phase-separated morphology.

In situ monitoring of isophorone diisocyanate-based flexible polyurethane foams formation

2016 ◽  
Vol 54 (1) ◽  
pp. 37-52 ◽  
Author(s):  
I Eceiza ◽  
L Irusta ◽  
A Barrio ◽  
MJ Fernández-Berridi
Keyword(s):  
Foam Height ◽  
Polyurethane Foams ◽  
In Situ Monitoring ◽  
Generation Process ◽  
Isophorone Diisocyanate ◽  
Experimental Conditions ◽  
Foaming Process ◽  
Foam Generation ◽  
Flexible Polyurethane

Novel isophorone diisocyanate-based flexible polyurethane foams were prepared by the one-step method in a computerized foam qualification system (FOAMAT). The experimental conditions to obtain this type of foams, in relation to the nature and concentration of catalysts as well as the reaction temperature, were established as no data were available in scientific literature. The chemical reactions occurring during the foam generation process were monitored in situ by attenuated total reflectance-FTIR spectroscopy. The kinetics of the foam generation was fitted to an nth order model and the data showed that the foaming process adjusted to a first-order kinetics. The physical changes as pressure, foam height, and dielectric polarization were monitored by the FOAM software (FOAMAT). According to these parameters, the foaming process was divided into four steps: bubble growth, bubble packing, cell opening, and final curing.

Polymers and Environment I. Biodegradability of Flexible Polyurethane Foams.

1993 ◽  
Vol 50 (10) ◽  
pp. 731-738 ◽  
Author(s):  
Noriyuki MOROHOSHI ◽  
Chun-Chieh HONG ◽  
Miyako MORIMOTO ◽  
Takashi OOHASHI ◽  
Hiroyuki MATUMOTO
Keyword(s):  
Polyurethane Foams ◽  
Flexible Polyurethane
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