橡胶和橡胶制品 用热裂解法测定硫化和未硫化化合物的成分 第1部分:丁二烯、乙烯－丙烯共聚物和三聚物、异丁烯－异戊二烯、异戊二烯和丁二烯橡胶

[中文适用范围]： 本文件规定了测定硫化橡胶和未硫化胶料中总有机物含量、炭黑含量和灰分的热重分析方法。 300 °C 时的质量损失是化合物挥发物含量的近似指标。 该方法适用于分析含有单独或作为混合物存在的以下橡胶的橡胶化合物和硫化橡胶： a) 天然或合成来源的聚异戊二烯； b) 聚丁二烯； c) 苯乙烯-丁二烯共聚物； d) 异丁烯-异戊二烯共聚物； e) 乙烯-丙烯共聚物和相关三元共聚物。 注：如果使用已知的化合物或具有相似成分的硫化橡胶事先测试了该方法的适用性，则该方法的应用领域可以扩展到含有与本子条款中给出的橡胶不同的橡胶的化合物的分析。 涵盖其他化合物 该方法不适用于含有在热解过程中形成碳质残留物的聚合物的橡胶，例如许多含氯或含氮橡胶。 该方法也不适用于含有在热解过程中导致碳质残留物形成的添加剂的材料，例如钴盐和铅盐或酚醛树脂。 该方法不适用于含有发泡剂和矿物填料的化合物，例如碳酸盐、水合氧化铝、水合氧化硅或硅酸盐，它们在 25 °C 至 650 °C 的温度范围内分解，除非根据现有知识进行适当的修正。 可以做出填充行为。 该方法不适用于测定含有非橡胶有机成分的化合物或硫化橡胶的总聚合物含量，这些有机成分不能通过按照 ISO 1407 进行的溶剂萃取完全去除。 1 [外文原描述]： ISO 9924-1:2016 specifies a thermogravimetric method for the determination of the total organic content, carbon black content and ash in vulcanizates and uncured compounds. The loss in mass at 300 °C is an approximate guide to the volatile-matter content of the compound. The method is suitable for the analysis of rubber compounds and vulcanizates containing the following rubbers occurring alone or as mixtures: a) polyisoprene of natural or synthetic origin; b) polybutadiene; c) styrene-butadiene copolymers; d) isobutylene-isoprene copolymers; e) ethylene-propylene copolymers and related terpolymers. NOTE The field of application of the method may be extended to the analysis of compounds containing rubbers different from those given in this subclause, provided that the applicability of the method is tested beforehand using known compounds or vulcanizates having a similar composition. Other compounds are covered in ISO 9924‑2. The method is not suitable for rubbers containing polymers which form a carbonaceous residue during pyrolysis, such as many chlorine- or nitrogen-containing rubbers. The method is also not suitable for materials containing additives which cause the formation of carbonaceous residues during pyrolysis, such as cobalt and lead salts or phenolic resins. The method is not suitable for compounds containing mineral fillers, such as carbonates or hydrated aluminium oxides, which decompose in the temperature range from 25 °C to 650 °C, unless suitable corrections based on prior knowledge of filler behaviour can be made. The method is not suitable for the determination of the total polymer content of compounds or vulcanizates containing non-rubber organic ingredients that cannot be completely removed by solvent extraction carried out in accordance with ISO 1407.