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首页> 外文会议>Conference on Recent Advances in Flame Retardancy of Polymeric Materials >Micro-Scale Study on the Flammability of Polymers
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Micro-Scale Study on the Flammability of Polymers

机译：聚合物易燃性的微观规模研究

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The flammability of polymers is mainly evaluated through ignitability, flame spread and heat release. Numerous tests have been developed and performed either in laboratory scale, with certain dimension of samples, or during industrial manufacturing on final products. Several of the most widely used tests are UL 94, Oxygen Index (OI), Oxygen Bomb Calorimeter and the Cone Calorimeter. A relatively new test method using a Micro-scale Combustion Calorimeter (MCC) instrument developed by Dr. Richard Lyon of the United States Federal Aviation Administration (FAA) and standardized in ASTM International as ASTM D7309 is now commercially available. The MCC test has the potential to quantitatively study materials flammability characteristics at the micro-scale level. With test specimens of 2 ～ 10 mg in mass, information, such as, ignition temperature, combustion temperature, heat release rate (HRR), heat release capacity (ηc), and total heat of combustion (HOC) is obtained. The polymers - PVC, fluoro-polymers - PVDF, PVDF-HEP, ECTFE, FEP mainly used in communication cables, and some hydrocarbon polymers - PP, PET and PBT, were selected for the MCC study. The results demonstrated that the flammability behavior of polymers is better understood in terms of their chemical structures and compositions with the ability to distinguish the difference of combustion process to a level that can distinguish between the type of plasticizer or colorant used in PVC compounds. The proposed Flammability Index (F_(index)) approximately defines and determines the degree of flammability characteristics of the studied polymeric materials. The F_(index) results successfully quantified the flammability performance. Based upon the limited polymers used in this study, the F_(index) as measured by the MCC, shows promise for better quantitative understanding of polymer flammability, and their correlation to required fire performance. However, more data is needed to develop the correlation of the results between MCC (including F_(index)) and the large-scale fire tests.
机译：聚合物的可燃性主要通过可燃性，火焰扩散和热释放来评估。已经开发了许多测试，并在实验室规模中进行，具有一定的样品维度，或在最终产品上的工业制造期间。最广泛使用的测试是UL 94，氧指数（OI），氧气炸弹量热计和锥形量热计。使用美国联邦航空管理局博士（FAA）开发的微级燃烧量热计（MCC）仪器和ASTM D7309的ASTM International制定的微级燃烧量热计（MCC）仪器的一种相对较新的测试方法。 MCC测试具有定量地研究微尺度水平的易燃性特性。通过质量试样为2〜10mg，获得的信息，例如点火温度，燃烧温度，热释放速率（HRR），热释放容量（ηc）和燃烧总热量（hoc）。聚合物 - PVC，氟聚合物 - PVDF，PVDF-HEP，ECTFE，FEP主要用于通信电缆，以及一些烃聚合物 - PP，PET和PBT，用于MCC研究。结果表明，在其化学结构和组合物方面，优质地理解聚合物的可燃性行为，其能够将燃烧过程的差异区分为可以区分PVC化合物中使用的增塑剂或着色剂的类型的水平。所提出的易燃性指数（F_（指数））近似定义和确定所研究的聚合物材料的可燃性特性。 F_（索引）结果成功地量化了易燃性能。基于本研究中使用的有限聚合物，通过MCC测量的F_（指数）显示了对聚合物易燃性更好地定量了解的承诺，以及它们与所需火力性能的相关性。但是，需要更多的数据来开发MCC（包括F_（索引））和大规模火灾测试之间的结果的相关性。

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