红外测定非均聚聚丙烯单体含量过程中样品制备方法的优化

Optimization of Sample Preparation Methods for Infrared Determination of Monomer Content in Non-uniform Polypropylene

摘要

在抗冲聚丙烯和无规聚丙烯生产过程中，要严格控制抗冲聚丙烯中的乙烯和橡胶相含量，本文作者研究了公司的企业标准，结合在生产抗冲聚丙烯的过程中，需要对中间控制2个样品进行样品制备并测试，完成这个分析任务需要大约1.5小时，此样品制备方法操作程序复杂，人的劳动负荷较重，分析效率低，会影响工艺生产调整，从而影响产品质量。综上所述，在不影响样品制备品质的前提下，利用LabTech公司生产的大压片机，通过选用溢料式和非溢料式模具，模具厚度的选择，优化压片条件参数等方面的摸索，进行样品制备和红外测试，通过对企业标准的改进和探讨，确定一种快速便捷的样品制备方法。

Abstract

In the production process of impact-resistant polypropylene, it is necessary to strictly control the content of ethylene rubber phase in impact-resistant polypropylene and atactic polypropylene. The authors of this paper studied the company’s enterprise standards and combined the process of producing impact-resistant polypropylene, it necessary to prepare and test two intermediate control samples. It takes about 1.5 hours to complete this analytical task. This sample preparation method has a complex operating procedure, heavy labor, and low analytical efficiency, which will affect the process production adjustment and thus affect the product quality. In summary, without affecting the quality of sample preparation, the authors used the pressure machine produced by LabTech company, through the selection of overflow and non-overflow mold, the selection of mold thickness, and the exploration of optimizing the pressing conditions, to carry sample preparation and infrared testing. Through the improvement and discussion of the enterprise standards, a quick and convenient sample preparation method was determined.

关键词

红外法 / 抗冲聚丙烯 / 乙烯 / 橡胶相 / 样品制备 / 优化

Key words

Infrared method / impactresistant polypropylene / ethylene / rubber phase / sample preparation / optimization

参考文献

[1] 刘国圣, 伏江峰, 廖珊珊, 张维斌. 样品制备方法对红外法测定抗冲聚丙烯中乙烯及橡胶相含量的影响. 中国科技博览,第13期2014年.

[2] 赵玉镶, 廖腾芳. 快速测定乙烯丙烯共聚聚丙烯中乙丙胶体含量的方法. CN1308231A.

[3] 陈允奎编. 红外吸收光谱法及其应用.上海:上海交通大学出版社, 1993. 110-112.