摘要
为获得性能良好的阻燃型聚丙烯基木塑复合材料(WPC),从理论上估算WPC中木粉(WF)所含的羟基(—OH),以指导调整膨胀型阻燃剂(IFRs)中聚磷酸铵(APP)与季戊四醇(PER)的比例及用量,通过正交试验对其进行优化。利用前期试验得到的协效剂组MgO/EG/SiO_2(其组成为m(MgO)∶m(可膨胀石墨,EG)∶m(SiO_2)=1∶5∶5,配比为m(IFRs)∶m(MgO/EG/SiO_2)=1.00∶0.18)对优化后的APP/PER进行阻燃增效,进一步提高WPC的阻燃性能。结果表明,当m(APP)∶m(PER)=2.0∶0.6、IFRs的质量分数为25%时的IFRs1对WPC的阻燃效果最为显著。IFRs1及MgO/EG/SiO_2的同时加入可有效提高WPC的热稳定性,其残炭率提高至24.79%。WPC/IFRs1的热释放速率峰和总热释放量比WPC分别降低了33.9%和10.4%,WPC/IFRs1/MgO/EG/SiO_2的热释放速率峰和总热释放量比WPC分别降低了39.15%和15.99%。硅烷偶联剂KH550、钛酸酯偶联剂NDZ-201和铝酸酯偶联剂DL-411-DF处理均能提高WPC/IFRs1/MgO/EG/SiO_2的力学性能和阻燃性能,其中KH550的效果最好。
In order to obtain a flame retardant PP/wood composite with good performance,the-OH numbers of wood flour（WF）in wood-plastics composite（WPC）were estimated in theory,and the results were used to guide the adjustment of the mass ratio of polyphosphate（APP）and pentaerythritol（PER）and their dosage in intumescent flame retardants（IF-Rs）.The formula of IFRs was optimized by the orthogonal experiments.The synergist agent group MgO/EG/SiO_2with the composition of m（MgO）∶m（expandable graphite,EG）∶m（SiO_2）=1∶5∶5,and proportion of m（IFRs）∶m（MgO/EG/SiO_2）=1∶0.18,which had been acquired in early experiment,was used to improve the efficiency of the optimized APP/PER for further improving the flame retardant properties of WPC.The results showed that the intumescent flame retardant（IFRs1）with m（APP）∶m（PER）=2∶0.6 and the content of 25%had a highest efficiency on flame retardant performance of WPC.Adding IFRs1 and MgO/EG/SiO_2to WPC simultaneously could effectively improve its thermal stability and the char residue rate reached to 24.79%at 600℃.The peak heat release rate and the total heat release of WPC/IFRs1 drop 33.9%and 10.4%,respectively,as well as the peak heat release rate and the total heat release of WPC/IFRs1/MgO/EG/SiO_2decreased 39.15%and 15.99%,respectively,compared with WPC.Surface modification by silane coupling agent KH550,titanate coupling agent NDZ-201,and aluminate coupling agents DL-411-DF could improve the mechanical and flame retardant properties of WPC/IFRs1/MgO/EG/SiO_2.KH550 had the best efficiency among them.
作者
生瑜
郑守扬
朱德钦
Sheng Yu Zheng Shouyang Zhu Deqin(Fujian Normal University, Fuzhou 350007, P. R. Chin)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2017年第4期88-93,共6页
Journal of Northeast Forestry University
基金
福建省高校产学合作项目(2015Y4003)
福建省高校产学合作科技重大项目(2012Y4002)
福建省自然科学基金项目(2010J01276)
关键词
正交试验
聚丙烯
木塑复合材料
膨胀型阻燃剂
协效剂
表面改性
Orthogonal experiment
Polypropylene
Wood-plastics composite
Intumescent flame retardants
Synergist agent
Surface modification
