Aging of polypropylene probed by near infrared spectroscopy

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-04-19 DOI:10.1177/0967033521999115

H. Shinzawa, Ryota Watanabe, S. Yamane, Maito Koga, Hideaki Hagihara, Junji Mizukado

引用次数: 1

Abstract

This paper describes the first in-depth attempt to characterize thermally induced aging of polypropylene (PP) samples by near infrared (NIR) spectroscopy. Significant levels of variation in NIR bands associated with short (amorphous-dominated) and long (crystalline-dominated) helices was readily captured when PP samples were subjected to thermal aging treatment. Partial least squares (PLS) regression models derived from the NIR spectra indicated significant level of correlation between the actual and predicted elongations of the samples. Analysis of PLS scores and two-dimensional (2D) correlation spectra derived from the aged PP samples revealed inner working mechanism of the regression model. Namely, the aging treatment essentially induces compositional change in crystalline and amorphous structures of the PP samples, which eventually affect the variation of the PLS scores. Thus, by utilizing the scores, it becomes possible to predict the change in the elongation property of the aged PP sample.

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聚丙烯老化的近红外光谱探测

本文首次通过近红外（NIR）光谱法对聚丙烯（PP）样品的热致老化进行了深入的表征。当PP样品经过热老化处理时，很容易捕捉到与短（无定形为主）和长（结晶为主）螺旋相关的NIR谱带的显著变化水平。从近红外光谱得出的偏最小二乘（PLS）回归模型表明，样品的实际伸长率和预测伸长率之间存在显著的相关性。对老化PP样品的PLS评分和二维相关谱的分析揭示了回归模型的内部工作机制。也就是说，老化处理本质上诱导PP样品的结晶和非晶结构的组成变化，这最终影响PLS评分的变化。因此，通过利用这些分数，可以预测老化PP样品的伸长率的变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.