ISO 14900:2017
Plastics — Polyols for use in the production of polyurethane — Determination of hydroxyl number
发布时间:2017-03-02 实施时间:


聚氨酯是一种重要的高分子材料,广泛应用于建筑、汽车、家具、鞋材、涂料等领域。聚氨酯的制备需要使用聚醚多元醇作为主要原料之一。聚醚多元醇是一种含有多个羟基的高分子化合物,其羟值是衡量其分子量大小和反应活性的重要指标。因此,对聚醚多元醇的羟值进行准确测定,对于聚氨酯的制备和质量控制具有重要意义。

ISO 14900:2017标准规定了聚醚多元醇羟值的测定方法。该方法基于化学分析原理,通过酸催化下的酯化反应,将聚醚多元醇中的羟基与苯甲酸酐反应生成苯甲酸酯,然后用碱溶液将反应产物中的苯甲酸酯水解成苯甲酸和醇,最后用酸碱滴定法测定反应产物中的苯甲酸和醇的含量,从而计算出聚醚多元醇的羟值。

ISO 14900:2017标准中规定了实验所需的试剂、仪器设备、操作步骤、计算公式等内容。该标准要求实验人员具有化学分析基础和实验操作技能,能够正确使用试剂和仪器设备,严格按照标准要求进行操作,保证实验结果的准确性和可靠性。

ISO 14900:2017标准的实施可以帮助聚氨酯生产企业掌握聚醚多元醇的质量状况,及时发现和解决生产过程中的问题,提高聚氨酯产品的质量和性能,降低生产成本,增强企业的竞争力。

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- ISO 14897:2018 Plastics — Determination of the ultimate anaerobic biodegradability of plastic materials in an aqueous system — Method by measurement of biogas production
- ISO 14855-1:2012 Determination of the ultimate aerobic biodegradability of plastic materials under controlled composting conditions — Method by analysis of evolved carbon dioxide — Part 1: General method
- ISO 14855-2:2018 Determination of the ultimate aerobic biodegradability of plastic materials under controlled composting conditions — Method by analysis of evolved carbon dioxide — Part 2: Gravimetric measurement of carbon dioxide evolved in a laboratory-scale test
- ISO 14855-3:2018 Determination of the ultimate aerobic biodegradability of plastic materials under controlled composting conditions — Method by analysis of evolved carbon dioxide — Part 3: Gravimetric measurement of carbon dioxide evolved in a laboratory-scale test in the presence of moisture