纳米CaCO_3对阻燃型软质聚氯乙烯的增韧增强作用  

Flame-retardant and Plasticized PVC Toughened and Reinforced by Nano-CaCO_3

作　　者：屈红强[1] 武伟红[2] 焦运红[1] 田春明[1] 徐建中[1] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002 [2]河北农业大学理学院,河北保定071000

出　　处：《中国塑料》2005年第7期36-40,共5页China Plastics

摘　　要：通过氧指数(LOI)、剩炭率、烟密度等级(SDR)、冲击强度、拉伸强度和断裂伸长率等参数的测定,研究了氢氧化物和金属配合物复合阻燃体系对软质PVC阻燃、消烟性能和力学性能的影响;通过冲击强度、拉伸强度、断裂伸长率以及材料流变性能的测定对比研究了纳米级CaCO3和微米级CaCO3对阻燃型软质PVC的力学性能和加工性能的影响。结果表明:氢氧化物和金属配合物复合阻燃体系在提高软质PVC阻燃、消烟性能的同时会恶化材料的力学性能;纳米CaCO3能明显提高阻燃型软质PVC的冲击强度、拉伸强度和断裂伸长率,对材料具有明显的增韧、增强作用,同时对材料的流变性能及阻燃、消烟性能影响不大。The flame retardancy, smoke suppression and mechanical properties of the flexible PVC that treated with metal hydroxides and metal chelates have been studied by the limiting oxygen index, the char yield, the smoke density rating, the impact strength, the tensile strength and the elongation at break. The effects of nanometric CaCO3 and micrometric CaCO3 on the mechanical properties and processability have been studied by the impact strength, the tensile strength, the elongation at break and the rheological behavior. The results showed that the metal hydroxides and the metal chelates enhanced the flame retardancy and the smoke suppression properties but decreased the mechanical properties. The nanometric CaCO3 enhanced the impact strength, the tensile strength and the elongation at break of flexible PVC that treated with flame-retardants and there is a little influence on the rheological behavior,flame-retardance property and smoke supression.

关 键 词：阻燃 纳米碳酸钙 聚氯乙烯 增韧 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]