硼化合物对WF-PVC热解和燃烧的影响  

Influence of boron compounds on pyrolysis and combustion behaviors of PVC wood-plastics composites

作　　者：白晓艳[1] 王清文[2] 张春生[1] 房轶群[2] 

机构地区：[1]呼伦贝尔学院生命科学与化学院,内蒙古呼伦贝尔021008 [2]东北林业大学生物质材料科学与技术教育部重点实验室,黑龙江哈尔滨150040

出　　处：《消防科学与技术》2012年第7期733-736,共4页Fire Science and Technology

基　　金：国家自然科学基金项目(31160145)

摘　　要：采用热重分析法和锥形量热仪测试方法研究硼化合物Na2B8O13.4H2O和2ZnO.3B2O3.3.5H2O对PVC木塑复合材料(WF-PVC)热解和燃烧过程的影响。结果表明:Na2B8O13.4H2O对WF-PVC热解过程影响较小,2ZnO.3B2O3.3.5H2O使WF-PVC热解过程的残炭量从18.04%提高到27.57%。与未经处理的WF-PVC相比,加入硼化合物均使燃烧过程的总热释放量(THR)和总烟释放量(TSP)降低,其中,2ZnO.3B2O3.3.5H2O使THR和TSP分别降低36.3%和55.8%,阻燃和抑烟效果显著。2ZnO.3B2O3.3.5H2O在WF-PVC中阻燃作用以凝聚相为主,同时伴随气相中的化学作用;Na2B8O13.4H2O在WF-PVC中为凝聚相作用机理。The effects of Na2 B8 O13·4H20 and 2ZnO·3B2 O3·3.5H2O on pyrolysis and combustion behaviors of PVC wood- plastic composite （WF--PVC） were investigated by Thermo- gravimetry analysis （TGA） and Cone calorimeter （CONE） analysis methods. It was showed that Na2B8O13·4H2O had less effect on pyrolysis of WF--PVC ;the addition of 2ZnO.382O3·3.5H20 could make residues increase from 18.04% to 27.57%, compared with WF--PVC. The total heat release （THR） and total smoke production （TSP） of PVC wood-plastic composite decreased with the introduction of 2ZnO.382O3·3.5H2O and Na2B8O13·4H2O, and they both showed fire-re- tardant and smoke-suppressant effect on the combustion pro-cessing; for the WF--PVC composite containing 2ZnO·382O3·3.5H2O, the total heat release and total smoke production were decreased by 36. 3% and 55. 8% respectively 2ZnO·382O3·3.5H2O used for WF--PVC mainly shows the characteristics of condensed phase for flame-retardant and associated with chemical reaction in gas phase. Na2BsO13·4H2O shows the characteristics of condensed phase for flame-retardant.

关 键 词：PVC木塑复合材料 锥形量热仪 燃烧 热解 热重分析 

分 类 号：X924.4[环境科学与工程—安全科学] TK121[动力工程及工程热物理—工程热物理]