PBS/木纤维阻燃型复合材料的燃烧动力学  

Combustion Dynamics of PBS/Wood-Fiber Flame Retardancy Composite

作　　者：刘鹏杰 孙一峰[1] 岳小鹏 张昕蕾 LIU Pengjie;SUN Yifeng;YUE Xiaopeng;ZHANG Xinlei(Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals,Guangdong Institute of Analysis,Guangzhou,Guangdong 510070,China;Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper,College of Bioresources Chemicals and Materials Engineering,Shaanxi University of Science and Technology,Xi'an,Shaanxi 710021,China;School of Material Science & Engineering,Shaanxi University of Science and Technology,Xi’an,Shaanxi 710021,China)

机构地区：[1]广东省测试分析研究所,广东省化学危害应急检测技术重点实验室,广东广州510070 [2]陕西科技大学轻工科学与工程学院,陕西省造纸技术及特种纸品开发重点实验室,陕西西安710021 [3]陕西科技大学材料科学与工程学院,陕西西安710021

出　　处：《塑料》2019年第5期23-28,共6页Plastics

基　　金：广东省科学院实施创新驱动发展能力建设专项(2018GDASCX-0104)

摘　　要：以改性木薯渣纤维和聚丁二酸丁二醇酯(PBS)为原料结合膨胀阻燃剂(IFR)和碱式硫酸镁晶须(MHSH)制备了阻燃型PBS/木薯渣纤维复合材料。利用TG-DSC并结合C-R和Ozawa法分别对复合材料的热解过程、吸热量和燃烧动力学进行了分析。结果表明,5%的木薯渣作为炭源代替PBS,提高了材料的阻燃性能。随着热解升温速率的增加,阻燃材料的和均增大,热稳定性提高。当热解升温速率为20t/min时,70P/23I/5C/2M(PBS为70%,IFR为23%,木薯渣为5%,MHSH为2%)的热解吸热量为558.01kJ/kg。模型计算结果表明,与C-R法相比,通过Ozawa法得到的阻燃材料的活化能准确性更高。阻燃材料燃烧时,在其外部形成了一层膨化的具有隔热作用的致密炭层,阻止了内部聚合物基体进一步燃烧。从而有效地提高了复合材料的阻燃性能。The flame retardancy PBS/cassava dregs fiber composite was prepared by using IFR and MHSH.The pyrolysis process,heat absorption and combustion kinetics of composites were analyzed by TG-DSC combined with C-H and Ozawa methods.Experimental data showed that 5% of cassava dregs could be used as a carbon source instead of PBS to improve the flame retardant performance of composites.The Ts% and Tmax of composites increased with the increase of pyrolysis heating rate,and the corresponding thermal stability of composites was improved.The thermal desorption calories of 70P/23I/5C/2M (PBS was 70%,IFR was 23%,cassava dregs was 5%,MHSH was 2%) was 558.01 kJ/kg at a heating rate of 20℃/min.The calculation results of the model showed that the Ozawa method had higher accuracy than the C-R method.A layer of puffed dense carbon having an insulating effect was formed on the outside of composites to protect the inner polymer matrix from further burning during combustion process.Thereby effectively improved the flame retardant performance of composites.

关 键 词：PBS 木薯渣纤维 膨胀阻燃剂 碱式硫酸镁晶须 动力学 复合材料 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]