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http://dx.doi.org/10.5762/KAIS.2021.22.2.33

A study on the comparative test of chemical and thermal properties of virgin and recycled PET products  

Kim, Kyoung Pil (Defense Agency for Technology and Quality)
Seo, Kyung Jin (Korea Apparel Testing & Research Institute)
Park, Soo-Yong (Department of Polymer Science & Engineering, Pusan National University)
Chung, Ildoo (Department of Polymer Science & Engineering, Pusan National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.22, no.2, 2021 , pp. 33-39 More about this Journal
Abstract
As the interest and demand in the recycled yarn field has increased rapidly worldwide, domestic companies are also promoting research and development and business on recycled yarn. The chemical and thermal properties of four types of virgin and recycled PET samples from A and B company, which are the leading domestic companies in the recycled polyester yarn business, were confirmed through infrared (FT-IR) spectroscopy and differential scanning calorimetry (DSC). Virgin and recycled PET from two companies were compared. FT-IR spectroscopy revealed the typical spectra of PET for both companies and a different peak at 872 cm-1. DSC confirmed that the melting point and crystallization temperature of recycled PET were lower than those of virgin PET. These results indicate that small amounts of contaminants are an important parameter affecting the thermal properties of recycled PET. In the DSC results after seven repeats of the heating and cooling processes, all four samples showed that a lower melting point, crystallization temperature, and low heat flow intensity increased with increasing number of cycles. The results of melting and crystallization enthalpy also showed similar patterns.
Keywords
Virgin PET; Recycled PET; FT-IR; DSC; Melting Point; Crystallization Temperature;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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