The open cell rigid polyurethane foam (ORPUF) was prepared by adding chemical cell openers including O-500 and AK-9903. The FTIR results of cell openers and open cell rate of ORPUFs showed that O-500 has more effective cell opening capacity. In the ORPUF foaming formulation using O-500 as cell opener, silane coupling agent (KH-550) modified kaolin (organo-kaolin) was introduced into ORPUF with different weight loadings. The cellular morphology, apparent density, and compressive strength of the foams were tested in order to investigate the effects of organo-kaolin on the open cell rate and compressive property of the foams. The results showed that the open cell rate of ORPUFs slightly increased from 83.9% to 92.9% with the content of organo-kaolin. Meanwhile, compared to neat ORPUF, the compressive strength of foams increased by 72.8% when the content of introduced organo-kaolin was 4 parts per hundred of polyol by mass (php).

中文翻译：

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有机高岭土改性开孔硬质聚氨酯泡沫的制备

通过添加包括 O-500 和 AK-9903 在内的化学开孔剂制备开孔硬质聚氨酯泡沫 (ORPUF)。ORPUFs的开孔剂和开孔率的FTIR结果表明O-500具有更有效的开孔能力。在使用 O-500 作为开孔剂的 ORPUF 发泡配方中，将硅烷偶联剂（KH-550）改性高岭土（有机高岭土）以不同的重量负载引入 ORPUF。为了研究有机高岭土对泡沫开孔率和压缩性能的影响，测试了泡沫的多孔形态、表观密度和压缩强度。结果表明，随着有机高岭土含量的增加，ORPUFs的开孔率从83.9%略微提高到92.9%。同时，与纯 ORPUF 相比，泡沫的抗压强度提高了 72。