Preparation and characterization of heat-resistant PET/bio-based polyester blends for hot-filled bottles

Sangyoon Park, Sarinthip Thanakkasaranee, Hojun Shin, Kihyeon Ahn, Kambiz Sadeghi, Youngsoo Lee, Guman Tak, Jongchul Seo

Research output: Contribution to journalArticle

Abstract

To improve the glass transition temperature (Tg) and heat resistance of polyethylene terephthalate (PET) bottle, poly (ethylene glycol 1,4-cyclohexane dimethylene isosorbide terephthalate) (PEICT) with a unique cyclic structure was introduced into PET. The miscibility of the PET/PEICT blends and their feasibility as a heat resistant bottle were investigated. The introduction of PEICT into PET increases the Tg and the PET/PEICT blends exhibit a single Tg, indicating good miscibility between PEICT and PET. Furthermore, the Tg and crystallinity of the PET/PEICT blends can be adjusted by controlling the amount of PEICT added. The PET/PEICT blends were transparent in the visible light range (no significant change in transparency) because the blends were truly miscible as confirmed by Fox equation. As expected, the introduction of PEICT into PET bottle allows for improved heat resistance and shape stability due to the rigid molecular structure and chirality of the two tetrahydrofuran rings in the isosorbide group of PEICT. Based on our results, the as-prepared PET/PEICT blends with controllable high heat resistance can be used as a cost-effective alternative material for various hot-filling conditions in the beverage industry by adjusting the optimal ratio of PEICT to PET for each product (e.g. fruit juice, tea).

Original languageEnglish
Article number106823
JournalPolymer Testing
Volume91
DOIs
Publication statusPublished - 2020 Nov

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics

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