Achieving bottle-grade poly(ethylene terephthalate)-like properties from blends of bottle-grade and thermoform-grade poly(ethylene terephthalate)

IF 2.9 4区化学 Q2 POLYMER SCIENCE Polymer International Pub Date : 2024-03-20 DOI:10.1002/pi.6633

Anurag Ganapathi, Mohamed A Abdelwahab, Muhammad Rabnawaz

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Abstract

Poly(ethylene terephthalate) (PET), both bottle grade (PET-B) and thermoform grade (PET-T), are widely used in the packaging sector. However, only PET-B is recycled and reused, while PET-T needs to be separated from recycled PET bales. This study aims to assess the impact of solid-state polymerization (SSP), chain extension and the combination of chain extension–SSP to transform PET-B and PET-T blends into PET-T-like material. The intrinsic viscosity (IV) values for PET-B blends with 10–20 wt% of PET-T are measured for the samples obtained in this study. The mechanical properties, such as tensile strength, modulus, elongation and impact strength, were also determined. The glass transition temperature, melting temperature, crystallinity and thermal degradation were also investigated. The findings suggest that the combination of SSP and chain extension leads to a significant improvement in IV and tensile strength, while SSP alone is less suitable to offer the desired IV values. © 2024 The Authors. Polymer International published by John Wiley & Sons Ltd on behalf of Society of Industrial Chemistry.

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利用瓶子级和热成型级聚对苯二甲酸乙二醇酯的混合物实现类似瓶子级聚对苯二甲酸乙二醇酯的性能

聚对苯二甲酸乙二酯（PET），包括瓶子级（PET-B）和热成型级（PET-T），在包装领域得到广泛应用。然而，只有 PET-B 可以回收和再利用，而 PET-T 则需要从回收的 PET 包中分离出来。本研究旨在评估固态聚合（SSP）、链延伸以及链延伸-SSP 组合对将 PET-B 和 PET-T 混合物转化为类似 PET-T 材料的影响。本研究测量了含有 10-20 wt% PET-T 的 PET-B 混合物样品的固有粘度 (IV) 值。此外，还测定了拉伸强度、模量、伸长率和冲击强度等机械性能。此外，还研究了玻璃化转变温度（Tg）、熔化温度（Tm）、结晶度和热降解。研究结果表明，结合使用 SSP 和链延伸可显著提高 IV 值和拉伸强度，而单独使用 SSP 则不太适合提供所需的 IV 值。

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来源期刊

Polymer International 化学-高分子科学

CiteScore

7.10

自引率

3.10%

发文量

135

审稿时长

4.3 months

期刊介绍： Polymer International (PI) publishes the most significant advances in macromolecular science and technology. PI especially welcomes research papers that address applications that fall within the broad headings Energy and Electronics, Biomedical Studies, and Water, Environment and Sustainability. The Journal’s editors have identified these as the major challenges facing polymer scientists worldwide. The Journal also publishes invited Review, Mini-review and Perspective papers that address these challenges and others that may be of growing or future relevance to polymer scientists and engineers.