A new Milligram-scale Flame Calorimetry (MFC) pyrolyzer system was developed to approximate heating conditions experienced by material samples in gram-scale tests, such as cone calorimetry. The main features of this pyrolyzer system are a miniature flat heating coil embedded into a platform supporting the sample crucible. The use of a constant power rather than a constant heating rate operation mode distinguished the new MFC from the other mg-scale flammability test method—microscale combustion calorimetry (MCC). A series of tests was carried out using the new MFC, cone, and MCC on five synthetic polymers representing a wide range of flammability behavior. All methods produced similar solid residue yields. The MFC peak heat release rate (HRR) was found to correlate linearly with the cone peak HRR (R² = 0.93). The MCC peak HRR did not exhibit a strong correlation with the corresponding cone data. The new MFC was found to produce heat of combustion (HOC) values nearly identical to those measured in cone calorimetry. The MCC had a tendency to produce higher heats of combustion. Both MFC and MCC measured sample ignition temperatures that showed some correlation with the square root of the time to ignition measured in a cone calorimeter. The MFC airborne particular yield was found to correlate well (linear R² = 0.91) with the average specific extinction area measured in the cone tests. It was concluded that the newly designed MFC can deliver relatively accurate flammability measurements similar to cone calorimetry while using three orders of magnitude smaller samples.

中文翻译：

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用于模拟非热薄固体样品燃烧的毫克级火焰量热仪热解器系统

开发了一种新的毫克级火焰量热法 (MFC) 热解器系统，以模拟克级测试（例如锥形量热法）中材料样品所经历的加热条件。这种热解器系统的主要特点是一个微型扁平加热线圈嵌入一个支撑样品坩埚的平台。使用恒定功率而不是恒定加热速率操作模式将新 MFC 与其他毫克级可燃性测试方法——微型燃烧量热法 (MCC) 区分开来。使用新型 MFC、锥体和 MCC 对五种具有广泛可燃性的合成聚合物进行了一系列测试。所有方法产生相似的固体残留物产率。发现 MFC 峰值热释放率 (HRR) 与锥形峰值 HRR (R ² = 0.93）。MCC 峰值 HRR 与相应的锥体数据没有表现出很强的相关性。发现新的 MFC 产生的燃烧热 (HOC) 值几乎与锥形量热法测量的值相同。MCC 倾向于产生更高的燃烧热。MFC 和 MCC 测量的样品点火温度与锥形量热计中测量的点火时间的平方根有一定的相关性。发现 MFC 空气传播特定产量 与锥体测试中测量的平均比消光面积有很好的相关性（线性 R ² = 0.91）。结论是，新设计的 MFC 可以提供与锥形量热法类似的相对准确的可燃性测量，同时使用三个数量级的较小样品。