聚氨酯泡沫塑料热分析  

Thermal Analysis of Polyurethane Foam Plastics

作　　者：杨雪飞[1] YANG Xuefei(Beijing Public Utility Science Research Institute, Beijing 100011,China)

机构地区：[1]北京市公用事业科学研究所,北京100011

出　　处：《工业加热》2017年第1期12-14,共3页Industrial Heating

摘　　要：针对聚氨酯开展导热性能分析,对聚氨酯导热系数、密度、闭孔率进行了实验研究,考察了聚氨酯密度、闭孔率对其导热系数的影响,并根据发泡过程中出现的孔洞开展模拟计算,建立基于多孔介质分形结构的物理模型,分析了孔洞对聚氨酯导热性能的影响。研究结果表明:随着密度的增大,聚氨酯的导热系数随之升高,聚氨酯的导热系数主要受固体孔壁结构的影响;聚氨酯闭孔率越低,导热系数越高,且过低的闭孔率会降低其密度;建立分形结构物理模型,通过数值模拟分析,闭孔率相同时,具有较大内部孔洞的聚氨酯导热系数较低。To carry out the thermal conduction performance of polyurethane,experimental examined the thermal conductivity,density,the obturator rate,studied the effect of density,the obturator rate on the conduction performance of polyurethane.According to the holes in the foaming process,the simulation calculation was carried out,and the effect of the hole on the thermal conductivity of polyurethane was analyzed based on the fractal structure of porous media.The results of the study indicate that along with the increase of the density,polyurethane thermal conductivity increased,thermal conductivity coefficient of polyurethane is mainly affected by the hole in the solid wall structure;polyurethane obturator rate is low,the higher thermal conductivity and low obturator rate will reduce its density;to establish a physical model of fractal structure,through the numerical simulation analysis,rate of obturator phase at the same time,with larger pore polyurethane thermal conductivity is low.

关 键 词：聚氨酯 导热性能 密度 闭孔率 孔洞 数值模拟 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]