Determination of the carbonyl index of polyethylene and polypropylene using specified area under band methodology with ATR-FTIR spectroscopy

e-Polymers

Wenzel Margot N.¹  Wallis Christopher¹  Sugumaar Piriya¹  Hill Gavin¹  Almond Jasmine¹ 

[1] Polymateria Limited, Translation and Innovation Hub, Imperial College White City Campus, 80 Wood Lane, White City, London, UK;

关键词: ftir;    carbonyl index;    accelerated ageing;    polyolefin;    polyethylene;    polypropylene;   

DOI  :  10.1515/epoly-2020-0041

来源: DOAJ

【 摘 要 】

The current measurement techniques described in the literature for the determination of the carbonyl index (CI) for polyolefins such as polyethylene and polypropylene were compared and contrasted. These were all found to be inconsistent or inaccurate and were not capable of differentiating significant changes in carbonyl peak evolution throughout accelerated ageing. As a consequence of these findings, a methodology, specified area under band (SAUB) is presented here to more accurately represent the CI as a general means of reporting. The increased precision in the methodology is explained and compared to other methodologies for determining CI. The SAUB method is also shown to be capable of elucidating the differences in relative extent and rates of CI for different polyolefins, exposed to the same conditions over the same time period.

【 授权许可】

Unknown