Quantitative analysis of branched high-density polyethylene content using far-infrared spectroscopy

Ayano Kitamura; Yuji Matsuzoe; Naoya Okitsu; Harumi Sato

doi:10.1016/j.saa.2024.125492

Quantitative analysis of branched high-density polyethylene content using far-infrared spectroscopy

Spectrochim Acta A Mol Biomol Spectrosc. 2024 Nov 26:329:125492. doi: 10.1016/j.saa.2024.125492. Online ahead of print.

Authors

Ayano Kitamura¹, Yuji Matsuzoe², Naoya Okitsu³, Harumi Sato⁴

Affiliations

¹ Graduate School of Human Development and Environment, Kobe University, 3-11 Tsurukabuto, Nada, Kobe, Hyogo 657-8501, Japan; Corporate Production Technology, Asahi Kasei Corporation, 2-1 Samejima, Fuji, Shizuoka, Japan.
² Corporate Production Technology, Asahi Kasei Corporation, 2-1 Samejima, Fuji, Shizuoka, Japan.
³ Environmental Solutions SBU, Asahi Kasei Corporation, 2767-11 Kojimashionasuazaniihama, Kurashiki, Okayama, Japan.
⁴ Graduate School of Human Development and Environment, Kobe University, 3-11 Tsurukabuto, Nada, Kobe, Hyogo 657-8501, Japan. Electronic address: [email protected].

PMID: 39637566
DOI: 10.1016/j.saa.2024.125492

Abstract

This study describes a simple method for estimating the content of branched high-density polyethylene using spectroscopy including the terahertz region. Herein, we prepared samples by blending high-density polyethylene with a blend ratio of 0 %-100 % of branched and linear polyethylene. Then, the terahertz absorption spectra of these samples were recorded from 600 to 50 cm^-1 (18-1.5 THz), and a calibration model based on absorption spectra and blend ratios was created using multivariate analysis. A very high correlation coefficient (R² = 1) was obtained between the model estimate and the measured values, confirming the validity of this method.

Keywords: Branched high-density polyethylene; Multivariable analysis; Polyethylene; Terahertz region.