将大豆油基多元醇以不同的比例添加到石油基多元醇中,得到热稳定性更高和阻燃效果更好的生物基聚氨酯泡沫(PUF)。采用锥形量热法、扫描电子显微镜、热重分析法和烟密度测试箱研究了不同比例大豆油基多元醇对PUF阻燃和抑烟性能的影响。结果表明:在辐射强度为25kW/m2、35kW/m2和50kW/m2条件下,PUF-S3均具有最好的阻燃效果;添加大豆油基多元醇后样品均表现出两阶段热解,同时PUF-S3热失重5%时的温度比PUF-0高16.49℃;添加大豆油基多元醇样品的最大烟密度均小于PUF-0。在石油基多元醇中添加大豆油基多元醇制备的PUF具有优良的阻燃和抑烟效果,大豆油基多元醇最佳添加量为15%(质量分数)。
Soybean oil-based polyols were added to petroleum-based polyols in different proportions to obtain bio-based polyurethane foams with higher thermal stability and better flame-retardant effect.The effects of different proportions of soybean oil-based polyols on the flame-retardant and smoke suppression of polyurethane foams (PUF) were investigated by cone calorimetry (CONE),scanning electron microscopy (SEM),thermogravimetric (TG) analysis,and smoke density chamber.The results showed that PUF-S3 exhibited the best flame-retardant effect under the three thermal radiation intensities of 25kW/m2,35kW/m2 and 50kW/m2.Based on the thermogravimetric results,the pyrolysis process of the samples after adding soybean oil-based polyols all exhibited two-stage pyrolysis,and the initial decomposition temperature of PUF-S3 was 16.49℃ higher than that of PUF-0 at 5% weight loss.In addition,in the smoke density test,the maximum smoke density of the samples added with soybean oil-based polyols was lower than that of PUF-0.Based on these data,it could be shown that the polyurethane foam prepared by adding soybean oil-based polyols to petroleum-based polyols had excellent flame retardant and smoke suppression effects.In the combustion process of modified PUFs,the optimal addition of soybean oil-based polyol was 15% (mass fraction).
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基金资助
辽宁省教育厅项目(JYT2020011)
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