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Polyurethane foams based on modified tung oil and reinforced with rice husk ash I: Synthesis and physical chemical characterization

机译:基于改性桐油并用稻壳灰增强的聚氨酯泡沫塑料I:合成与物理化学表征

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摘要

A chemically modified tung oil was used as the main polyol component in the formulation of viscoelastic (low resilience) polyurethane foams. Rice Husk Ash (RHA), a residue from the rice process industry, was chosen to be incorporated as rigid filler in these materials because of its high silica content. Water was used as blowing agent in order to increase the green nature of the reinforced foams. Physico-chemical and thermal properties of the neat and reinforced foams were measured and analyzed. RHA addition leads to noticeable changes in several properties, mainly thermal conductivity, density and foam morphology, even at the low filler content used in this work. Although the thermal stability was almost unaffected by ash content, a stabilizing effect of the inorganic filler was identified, since the residual char was higher than predicted from theoretical calculations.
机译:在粘弹性(低回弹)聚氨酯泡沫的配方中,化学改性的桐油被用作多元醇的主要成分。稻壳灰(RHA)是大米加工业的一种残留物,由于其高二氧化硅含量而被选择作为硬质填料掺入这些材料中。为了增加增强泡沫的绿色特性,水被用作发泡剂。测量和分析了纯泡沫塑料和增强泡沫的理化性质和热性质。即使在这项工作中使用的填料含量较低时,添加RHA也会导致几种性能的显着变化,主要是导热性,密度和泡沫形态。尽管热稳定性几乎不受灰分的影响,但由于残留的炭含量高于理论计算的预测值,因此可以确定无机填料的稳定作用。

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