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首页> 外文期刊>Journal of Applied Polymer Science >Effect of foam density on the properties of water blown rigid polyurethane foam
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Effect of foam density on the properties of water blown rigid polyurethane foam

机译：泡沫密度对水硬性聚氨酯泡沫塑料性能的影响

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摘要

Density is an important parameter that influences the properties and performances of rigid polyurethane foam (PUF). Rigid PUF with different densities were prepared by varying the amount of distilled water as blowing agent. This investigation reports the mechanical, morphological, water absorption, thermal conductivity, and thermal behavior of rigid PUF varying with the density, which controls the foam architecture. The density of the PUF decreased from 116 to 42 kg/m(3) with an increase in the amount of water from 0.1 to 3.0 parts per hundred polyol by weight (phr), respectively. It was found that the mechanical properties of the PUFs changed with the foam density. The results of water absorption of the PUFs showed that water absorption increased with decrease in density, due to increase in the cell size and decrease in the cell-wall thickness. The thermal conductivity measurements showed that the thermal conductivity decreased with increase in density. It was due to the decrease in cell size. The thermal analysis of the PUFs shows that the glass transition temperature increases with the decrease in foam density, but the thermal stability decreases with the decrease in foam density. (c) 2008 Wiley Periodicals, Inc.
机译：密度是影响硬质聚氨酯泡沫（PUF）的性能和性能的重要参数。通过改变蒸馏水的量作为发泡剂来制备具有不同密度的硬质PUF。这项研究报告了刚性PUF的机械，形态，吸水率，热导率和热行为随密度的变化而变化，从而控制了泡沫的结构。 PUF的密度从116降低到42 kg / m（3），水的含量分别从每100重量份多元醇（phr）增加0.1到3.0份。发现PUF的机械性能随泡沫密度而变化。 PUFs的吸水率结果表明，由于泡孔尺寸的增加和泡孔壁厚度的减小，吸水率随着密度的降低而增加。热导率测量表明，热导率随密度的增加而降低。这是由于细胞大小的减少。 PUF的热分析表明，玻璃化转变温度随泡沫密度的降低而增加，但热稳定性随泡沫密度的降低而降低。 （c）2008 Wiley期刊公司

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