微热量热法测定纤维及树脂基复合材料的比热容

为研究利用微热量热法测定纤维及树脂基复合材料的比热容，用焦耳效应建立微热量热仪的灵敏度曲线，在该仪器上测定了30～150 ℃标准品α-氧化铝的比热容，在此温度范围内α-氧化 铝比热测量值与文献值的最大相对偏差为2.41%，该方法具有较高的测量精度。利用微热量热仪测定了碳纤维及3种树脂基复合材料的连续比热容数据，并对测试结果进行了分析。结果表明：微热量热仪能准确快捷的测定纤维及复合材料的连续比热数据，纤维及复合材料比热容随温度有规律的变化。

Determinatio of Specific Heat Capacity of Fiber and Resin Matrix Composites by Micro-calorimeter

In order to study a method of determining the specific heat capacity of fiber and resin matrix composites by micro-calorimeter, the sensitivity curve of micro-calorimeter is determined by Joule effect. The specific heat capacity of standard sample α-Al₂O₃ in the range of 30～150 ℃ is obtained by micro-calorimeter , and the maximum difference between their test values and literature values is 2.41%. The measuring accuracy of the method is high. And the continuous specific heat capacities of carbon fiber and three kinds of resin matrix composites are gained by using the method. The results show that the micro-calorimeter could accurately and conveniently determine the continuous specific heat capacities of fiber and compound materials and also the change regulation of specific heat capacities with temperature. The change regulations of c_p of fiber and resin matrix composites are discussed.