塑料阻燃性深度总结.doc

塑料阻燃性深度总结 原著：SERGEI V. L EVCHIK 1.1?引言 1.2?聚合物燃烧与测试 1.2.1?可燃性的实验室测试 1、Flammability of polymers is assessed primarily through ignitability, flame spread, and?heat release。 聚合物的燃烧性主要从易燃性、火焰传播性、释热性三个方面进行评估。 2、Numerous flammability tests are known and are performed either on representative samples or on an assemble d product. Tests can be small, intermediate, or?full scale。 许多可燃性测试可用试样或最终产品进行，在规模上分为小型、中型及大型测试。 3、A V-0 classification is given to material that is extinguished in less than?10?s after any flame application. The mean combustion time for the five specimens tested (10 flame applications) should not exceed???5?s, and no combustible drips can be observed. A V-1 classification is received by a sample with maximum combustion time ?50 s and mean combustion time for five specimens ???25 s. No combustible drips should be observed. The sample is classified V-2 if it satisfies the combustion time criteria of V-1 but flammable drips igniting the cotton are allowed。 UL94V0级评定标准：每次点燃后10s内即发生自熄，5个试样（10次点燃）的平均燃烧时间不超过5s，无具有引燃性的熔融滴落。V-1级评定标准：试样最长的燃烧时间小于30s，平均燃烧时间小于25s，无具有引燃性的熔融滴落。V-2级评定标准：符合V-1级标准的燃烧时间限制，允许具有引燃性的熔融滴落。 4、The LOI test does not represent a real fire scenario, but it is good as a screening tool because it gives a numerical value instead of a discrete classification (e.g., V-0, V-1, V-2). 虽然LOI法仅能测试实验室条件而非真实火情下材料的易燃性，但其可提供较详实的数据而非不连贯的等级划分(例如, V-0, V-1, V-2)。 5、The cone calorimeter test is a bench-scale (medium-sized) test developed at NIST which quickly gained popularity in the academic community as well as for standardization purposes (e.g., ISO 5660-1, ASTM E-1354). It is also used as a tool for fire protection engineering because it allows prediction of large-scale test results. A cone calorimeter measures consumption of oxygen from a burning sample 100 × 100??mm in area and up to 50? ?mm thick. The heat release is calculated from the oxygen consumption data. 锥形量热仪测试法是美国国家标准及技术研究院（NIST）制定与规范的一个中等规模实验室测试法，它很快得到了学术界的普遍认可，并为其制定了相关标准(例如?ISO 5660-1, ASTM E-1354)。因该