Non-contact terahertz evaluation of the melting point for PET bottles

Kazuma Iwasaki; Kento Hirabayashi; Eimi Yamaguchi; Sho Fujii; Tsuyoshi Kimura; Masaya Yamamoto; Tadao Tanabe

doi:10.1016/j.tca.2024.179732

Non-contact terahertz evaluation of the melting point for PET bottles

Kazuma Iwasaki, Kento Hirabayashi, Eimi Yamaguchi, Sho Fujii, Tsuyoshi Kimura, Masaya Yamamoto, Tadao Tanabe

ENG - Materials Processing

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

From measurements of the terahertz spectra of commercial polyethylene terephthalate (PET) bottles, a linear correlation is observed between the melting point of the plastic and the absorption intensity around 4 THz. This result indicates that the melting point could be estimated using a non-contact method from the 4 THz peak intensity of the PET bottles. The melting points of the PET bottles used as samples in this study varied from 500 to 503 K. In the present-day recycling process, all waste PET is heated to the same temperature above the highest of the melting points. Based on the data obtained in this study, if could be possible to sense the melting point of waste PET in advance without heating and therefore to optimize the thermal budget of the recycling process.

Original language	English
Article number	179732
Journal	Thermochimica Acta
Volume	736
DOIs	https://doi.org/10.1016/j.tca.2024.179732
Publication status	Published - 2024 Jun

Keywords

Non-destructive evaluation
PET
Terahertz wave

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10.1016/j.tca.2024.179732

Cite this

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title = "Non-contact terahertz evaluation of the melting point for PET bottles",

abstract = "From measurements of the terahertz spectra of commercial polyethylene terephthalate (PET) bottles, a linear correlation is observed between the melting point of the plastic and the absorption intensity around 4 THz. This result indicates that the melting point could be estimated using a non-contact method from the 4 THz peak intensity of the PET bottles. The melting points of the PET bottles used as samples in this study varied from 500 to 503 K. In the present-day recycling process, all waste PET is heated to the same temperature above the highest of the melting points. Based on the data obtained in this study, if could be possible to sense the melting point of waste PET in advance without heating and therefore to optimize the thermal budget of the recycling process.",

keywords = "Non-destructive evaluation, PET, Terahertz wave",

author = "Kazuma Iwasaki and Kento Hirabayashi and Eimi Yamaguchi and Sho Fujii and Tsuyoshi Kimura and Masaya Yamamoto and Tadao Tanabe",

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doi = "10.1016/j.tca.2024.179732",

language = "English",

volume = "736",

journal = "Thermochimica Acta",

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TY - JOUR

T1 - Non-contact terahertz evaluation of the melting point for PET bottles

AU - Iwasaki, Kazuma

AU - Hirabayashi, Kento

AU - Yamaguchi, Eimi

AU - Fujii, Sho

AU - Kimura, Tsuyoshi

AU - Yamamoto, Masaya

AU - Tanabe, Tadao

PY - 2024/6

Y1 - 2024/6

N2 - From measurements of the terahertz spectra of commercial polyethylene terephthalate (PET) bottles, a linear correlation is observed between the melting point of the plastic and the absorption intensity around 4 THz. This result indicates that the melting point could be estimated using a non-contact method from the 4 THz peak intensity of the PET bottles. The melting points of the PET bottles used as samples in this study varied from 500 to 503 K. In the present-day recycling process, all waste PET is heated to the same temperature above the highest of the melting points. Based on the data obtained in this study, if could be possible to sense the melting point of waste PET in advance without heating and therefore to optimize the thermal budget of the recycling process.

AB - From measurements of the terahertz spectra of commercial polyethylene terephthalate (PET) bottles, a linear correlation is observed between the melting point of the plastic and the absorption intensity around 4 THz. This result indicates that the melting point could be estimated using a non-contact method from the 4 THz peak intensity of the PET bottles. The melting points of the PET bottles used as samples in this study varied from 500 to 503 K. In the present-day recycling process, all waste PET is heated to the same temperature above the highest of the melting points. Based on the data obtained in this study, if could be possible to sense the melting point of waste PET in advance without heating and therefore to optimize the thermal budget of the recycling process.

KW - Non-destructive evaluation

KW - PET

KW - Terahertz wave

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DO - 10.1016/j.tca.2024.179732

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VL - 736

JO - Thermochimica Acta

JF - Thermochimica Acta

M1 - 179732

ER -

Non-contact terahertz evaluation of the melting point for PET bottles

Abstract

Keywords

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