Abstract
The impact of replacing three polyether polyols with different levels of a single palm olein-based natural oil polyol (NOP) was systematically correlated with the changes in foaming reactivity, cell structure, physico-mechanical properties, and morphology of viscoelastic (VE) foams. The data show that replacing the polyether polyols with the NOP slightly increased the rate of the foaming reactivity. Increasing the NOP content resulted in increased cell size and cells remained fully open. Increased NOP content contributed to higher load bearing properties of VE foam, which can be attributed to higher functionality of NOP compared to polyether polyols. Addition of the NOP slightly increased the resilience of the foams, however, the hysteresis which is the measure of energy absorption remained mostly unaffected. Age properties, characterized by dry and humid compression sets, were mostly unaffected by the replacement of the polyether polyol with the NOP. The addition of NOP did not impact the morphology of the VE foam polymer matrix, which appears to retain a low degree of hard and soft segment domain separation. Overall, the results demonstrate a feasibility that the NOP can be used to partially replace the polyether polyols in VE polyurethane foams without significant impact on the functional performance.
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Acknowledgments
The authors would like to thank the Malaysian Palm Oil Board (MPOB) and the Director General of MPOB for providing the financial support for this research work. The authors would also like to thank our research officers and supporting staff at the Advanced Oleochemical Technology Division (AOTD), as well as members of Troy Polymers, Inc. (TPI) for their invaluable contributions to this work.
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Nurul ‘Ain, H., Maznee, T.I.T.N., Norhayati, M.N. et al. Natural Palm Olein Polyol as a Replacement for Polyether Polyols in Viscoelastic Polyurethane Foam. J Am Oil Chem Soc 93, 983–993 (2016). https://doi.org/10.1007/s11746-016-2832-7
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DOI: https://doi.org/10.1007/s11746-016-2832-7