协效剂对膨胀阻燃聚丙烯基木塑复合材料的阻燃增效研究
发布时间:2018-06-23 17:54
本文选题:正交试验 + 木塑复合材料 ; 参考:《应用化学》2017年02期
【摘要】:赋予木塑复合材料(WPC)的阻燃性能成为近年来该领域国内外的研究热点之一。本文通过两轮正交试验,研究8种常见的协效剂对膨胀型阻燃剂(IFRs,m(聚磷酸铵,APP)∶m(季戊四醇,PER)=2∶1)的阻燃增效作用,筛选出具有显著协效作用的协效剂组MgO/EG(可膨胀石墨)/SiO_2,其组成为m(MgO)∶m(EG)∶m(SiO_2)=1∶5∶5,其与IFRs的最佳配比为m(IFRs)∶m(MgO/EG/SiO_2)=1∶0.18,得到性能良好的阻燃型聚丙烯基木塑复合材料。通过热重分析(TGA)和锥形量热分析(CONE)评价IFRs及协效剂组对聚丙烯(PP)基木塑复合材料(WPC)热稳定性能和阻燃性能的影响。结果表明,IFRs及MgO/EG/SiO_2的加入可以有效提高WPC的热稳定性,WPC/IFRs/MgO/EG/SiO_2600℃的残炭率达到22.42%。WPC/IFRs的热释放速率峰(PHRR)、总热释放量(THR)和总烟释放量(TSP)相比于WPC分别降低了21.9%、8.7%和22%。MgO/EG/SiO_2的加入可以进一步提高IFRs的阻燃效率,WPC/IFRs/MgO/EG/SiO_2的PHRR和THR相比于WPC分别降低了33.0%和13.8%。
[Abstract]:The flame retardancy of wood plastic composites (WPC) has become one of the research hotspots at home and abroad in recent years. The flame retardancy and synergism of eight common synergistic agents on intumescent flame retardants (IFRsm (ammonium polyphosphate app): M (pentaerythritol per) 2: 1) were studied by two rounds of orthogonal experiments. A synergist group MgO / EG (expandable graphite / SiO2) / SiO2 was selected. Its composition is m (MgO): M (EG): M (EG): M (SiO2) 1: 5: 5, and the best ratio of IFRs to IFRs is m (IFRs):% m (MgOr / EG / SiO2) 1: 0.18.The flame retardant polypropylene matrix composites with good properties are obtained. Thermogravimetric analysis (TGA) and conical calorimetry (Cone) were used to evaluate the effects of IFRs and synergistic agents on the thermal stability and flame retardancy of polypropylene (PP)-based wood-plastic composites (WPC). The results show that the addition of IFRs and MgO / EGR / SiO2 can effectively improve the thermal stability of WPC. The carbon residue rate of WPC / IFRsr / MgOP / SiO2600 鈩,
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