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首页> 外文期刊>Journal of Applied Polymer Science >Impact of the hard-segment concentration on highly resilient polyurethane foams based on palm olein polyol
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Impact of the hard-segment concentration on highly resilient polyurethane foams based on palm olein polyol

机译：基于棕榈油蛋白多元醇的高弹性聚氨酯泡沫对高弹性聚氨酯泡沫的影响

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The impact of replacing polyether polyol with different levels of a palm-olein-based natural oil polyol (NOP) was systematically correlated with the changes in the foaming reactivities, cell structures, physicomechanical properties, and morphologies of highly resilient (HR) polyurethane foams. Replacing the polyether polyol with the NOP did not require us to significantly modify the formulation to obtain stabile foams with uniform and open cell structures. The incorporation of the NOP increased the tear strength and load-bearing capacity of the HR polyurethane foams; this was attributed to the high functionality and lower equivalent weight of the NOP. The addition of the NOP increased the energy-absorbing properties of the molded HR foams; this correlated with the increased phase mixing of hard and soft segments, as determined via dynamic mechanical analysis and Fourier transform infrared analyses. The HR-molded foams' hysteresis and compression sets, which are inversely correlated with the durability of HR-molded foams in automotive seating applications, were found to increase with the addition of the NOP. However, it was demonstrated that the changes in the hysteresis and compression set could be partially offset by the reduction of the isocyanate index, which could allow for the increased incorporation of the NOPs in the HR foams without a notable loss of key performance characteristics. (C) 2017 Wiley Periodicals, Inc.
机译：用不同水平的棕榈-110基天然油多元醇（NOP）的替代聚醚多元醇的影响与高度弹性（HR）聚氨酯泡沫的发泡反应性，细胞结构，物理机械性能和形态的变化有系统地相关。用NOP取代聚醚多元醇并不要求我们显着改变配方以获得具有均匀和开放电池结构的稳定泡沫。 NOP的掺入增加了HR聚氨酯泡沫的撕裂强度和承载能力;这归因于NOP的高功能性和等效重量。添加NOP增加了模塑的HR泡沫的能量吸收性能;这与硬质和软段的增加的相位混合相关，如通过动态机械分析和傅里叶变换红外分析所确定的。发现HR模制的泡沫的滞后和压缩集，其与汽车座椅应用中的HR模制泡沫耐久性相关的滞后和压缩集，随着NOP的增加而增加。然而，证明滞后和压缩集的变化可以通过减少异氰酸酯指数来部分地偏移，这可能允许在没有显着的关键性能特征的情况下增加NOP的掺入。 （c）2017 Wiley期刊，Inc。

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