テラヘルツ分光によるポリエチレンの分子量推定法

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2023/05/01

タイトル(英語): Estimation Method of Molecular Weight of Polyethylene using Terahertz Spectroscopy

著者名: 北村　文乃（旭化成（株）），沖津　直哉（旭化成（株）），池田　誠人（旭化成（株））

著者名(英語): Ayano Kitamura (Asahi Kasei Corporation), Naoya Okitsu (Asahi Kasei Corporation), Makoto Ikeda (Asahi Kasei Corporation)

キーワード: テラヘルツ波，ポリエチレン，分子量，吸収スペクトル，多変量解析　　terahertz wave，polyethylene，molecular weight，absorbance spectra，multivariable analysis

要約(英語): This paper uses terahertz (THz) spectroscopy for the first time as a simple method for estimating the molecular weight of a polymer across a very wide range. The viscosity average molecular weight (Mv) was measured and estimated as the molecular weight. Currently, to measure the Mv, a sample is dissolved in a solvent then measured its inherent viscosity. However, this procedure is complicated and time-consuming in practice. Additionally, as the molecular weight increases, the measurement accuracy decreases if Mv of a sample is above 3 million. Therefore, a new simple method is desired. A linear high-density polyethylene sample with an Mv range of 0.1 to 7.4 million was used. THz absorbance spectra of the samples were measured from 50 to 600 cm-1 (1.5 to 18 THz) then the multivariable analysis technique was applied. Consequently, a very high correlation coefficient (R2 ≈ 1) between the estimated and the measured Mv values were obtained across the range of the samples. This method is essential and suitable for industrial applications.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.143 No.5 （2023）

本誌掲載ページ: 180-185 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/143/5/143_180/_article/-char/ja/