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首页> 外文会议>Eco-Energy and Materials Science and Engineering >Effect of natural oil based polyols on the properties of flexible polyurethane foams blown by distilled water
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Effect of natural oil based polyols on the properties of flexible polyurethane foams blown by distilled water

机译：天然油基多元醇对蒸馏水熔断柔性聚氨酯泡沫性能的影响

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Generally, the flexible polyurethane foams were synthesized by mainly petroleum-based polyols. In this present study, Caradol SA34-05 (petroleum-based polyol) was replaced by Emerox~R 14001 (natural oil-based polyol) with 0-50 wt% replacement to prepare flexible polyurethane foam by one shot method. The NCO index (NCO equivalent/OH equivalent) was fixed at 1.00. The characteristic times such as cream time, gel time, rise time and tack free time were followed during cup test. The physical properties were characterized and studied by Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), and foam density. The tensile and compression properties were investigated by UTM machine. The results show that the foam density decreased with increasing Emerox~R 14001 contents up to 20 wt% replacement and then decreased. This trandency was similar to tensile modulus, compressive modulus and compressive strength results. The cell size of foams was important parameter to control their properties. However, tensile strength and elongation at break were enhanced by the addition of Emerox~R 14001 at 20 wt% contents replacement and then decreased at higher content. Both parameters rely on balance between urethane linkages and urea microdomain and/or polyurea ball contents(urea aggregate), which were rapidly generated by isocyanate group and water. The increased Emerox~R 14001 contents required more isocyanate. As a result, more urea microdomain were produced leading to the decreasing of tensile strength and elongation at break. Moreover, the compression set of the foams was dependent upon amount of urea linkages which was generated from the reaction of isocyanate group and water.
机译：通常，通过主要是石油基多元醇合成柔性聚氨酯泡沫。在本研究中，Caradol SA34-05（石油基多元醇）被eMEROX〜R 14001（天然油基多元醇）取代，用0-50wt％的替代品代替，以通过一次拍摄方法制备柔性聚氨酯泡沫。 NCO指数（NCO等效/ OH等价）固定在1.00。在杯子试验期间，遵循奶油时间，凝胶时间，上升时间和粘性空间等特征时间。通过傅里叶变换红外光谱（FTIR），扫描电子显微镜（SEM）和泡沫密度来表征和研究物理性质。 UTM机研究了拉伸和压缩性能。结果表明，泡沫密度随着高达20wt％的替代品的增加而增加，随后含量增加20％（重量）。这种运动与拉伸模量，压缩模量和抗压强度结果类似。泡沫的细胞尺寸是控制其性质的重要参数。然而，通过在20wt％的含量置换为20wt％含量的含量下加入e ox〜R 14001，提高了抗拉强度和断裂伸长率，然后在更高的含量下降低。这两个参数依赖于聚氨酯键和尿素微米和/或聚脲球含量（尿素骨料）之间的平衡，这些参数由异氰酸酯组和水迅速产生。含量增加〜R 14001内容物需要更多异氰酸酯。结果，产生更多的尿素微膜，导致抗拉强度的降低和断裂处的伸长率。此外，泡沫的压缩集依赖于来自异氰酸酯基团和水的反应产生的尿素键量。

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