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机构地区:[1]福建省高分子材料重点实验室,福建师范大学材料科学与工程学院,福州350007
出 处:《应用化学》2017年第2期195-203,共9页Chinese Journal of Applied Chemistry
基 金:福建省科技厅高校产学合作项目(2015Y4003);福建省科技厅高校产学合作科技重大项目(2012Y4002);福建省自然科学基金资助项目(2010J01276)~~
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%。Improving flame retardant properties of wood plastic composite material(WPC) has become one of the research hotspots of WPC in recent years. In this paper, the flame-retardant synergistic effects of eight kinds of synergists on intumescent flame retardants ( IFRs, m ( polyphosphate, APP) : rn ( pentaerythritol, PER) = 2 : 1 ) were studied .by two rounds of orthogonal experiments. The synergist group MgO/EG (expandable graphite)/SiO2with a significant synergistic flame retardant effect on the IFRs was obtained. The composition of MgO/EG/SiO2is m ( MgO ) : m (EG) : m( SiO2 ) = 1 : 5 : 5, optimum proportion of rn ( IFRs ) : m(MgO/EG/SiO2) is 1:0. 18. The influence of IFRs and MgO/EG/SiO2 on thermal stability and flame- retardant properties of polypropylene based wood-plastics composite ( WPC ) was evaluated by thermogravimetric analysis (TGA) and cone calorimetry analysis (CONE). The results show that adding IFRs and MgO/EG/SiO2 to WPC can improve its thermal stability effectively, and the char residue of WPC/IFRs/MgO/EG/SiO2 at 600℃ reaches to 22. 42%. The peak heat release rate ( PHRR), the total heat release (THR) and total smoke production release (TSP) of WPC/IFRs reduce by 19. 0%, 8.7 % and 22. 1% , respectively, compared with WPC.MgO/EG/SiO2 can further improve the flame retardant efficiency of IFRs, and the PHRR and THR of WPC/IFRs/MgO/EG/SiO2 drop by 33.0% and 13.8%, respectively, compared with WPC.
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