钼酚醛树脂成碳率测量的影响因素及其不确定度  

Influence Factors and Measurement Uncertainty of Char Yield for Molybdnim Modified Phenolic Resins

作　　者：魏莉萍[1] 刘运传[1] 郑会保[1] 孟祥艳[1] 周燕萍[1] 

机构地区：[1]中国兵器工业集团第五三研究所,济南250031

出　　处：《宇航材料工艺》2009年第4期69-72,共4页Aerospace Materials & Technology

摘　　要：酚醛树脂的成碳率受样品自身及成碳条件的各种因素影响,使其成碳率的热重法(TGA)测量结果因试验条件不同而不同。为掌握其中关系,以便对酚醛树脂体系的成碳率做出正确的测评,本文通过试验考察了样品粒径分布、氮气流速、样品量等因素对钼酚醛树脂成碳率测量结果的影响程度与规律,并对其测量不确定度进行了分析。结果表明,样品粒径分布与样品量是影响钼酚醛树脂成碳率的主要因素,在常规测试条件下,TGA法测量钼酚醛树脂成碳率的扩展不确定度为0.9%。The char yield of phenolic resins is influenced by various factors of the sample itself and char forming conditions, and that makes the results of char yield measuring by thermogravimetry method different at different test conditions. In order to grasp the relations among them and to evaluate the char yield of phenolic resin systems correct- ly, the affacting extents and patterns of sample size distribution, the flow rate of nitrogen gas and the sample weight to the measure results of char yield by TGA of molybdenum modified phenolic resins were investigated through experiments. Also, the measuring uncertainty of carbon yield was analyzed. The results show that sample size distribution and sample weight are the main influential factors for the char yield of molybdenum modified phenolic resins. Under the conventional test conditions, the expanded measurement uncertainty of char yield of molybdenum modified phenolic resins by TGA is 0.9%.

关 键 词：成碳率 TGA 钼酚醛树脂 测量不确定度 

分 类 号：TQ433.431[化学工程] TB9[一般工业技术—计量学]