Yuvalı Gökçen, Dagasan Bulucu Esen, Demirel Bilal, Yaraş Ali, Akkurt Fatih, Sürdem Sedat, Demirel Burçak
Department of Pharmaceutical Biotechnology, Erciyes University, Kayseri 38280, Turkey.
Department of Material Science and Engineering, Erciyes University, Kayseri 38030, Turkey.
ACS Omega. 2024 Jan 8;9(3):3491-3498. doi: 10.1021/acsomega.3c07193. eCollection 2024 Jan 23.
For polyethylene terephthalate (PET) bottles, a material used for food packaging, light transmission and mechanical performance, particularly environmental stress cracking (ESC), are essential characteristics. For this purpose, following extrusion of PET/CaO granules, preforms were manufactured using the injection technique, and bottles were produced by a stretch-blow-molding process. With incorporation of calcium oxide (CaO), light transmittance increased by around 25%, and ESC went from 0.3 to 11 min. In addition, whereas acetaldehyde (AA) and carboxylic acid (COOH) decomposition values rose with increasing CaO content, diethylene glycol and isophthalic acid values did not significantly change. Moreover, the maximum crystallization temperature and crystallinity both exhibited an upward trend with the CaO content.
对于用于食品包装的聚对苯二甲酸乙二酯（PET）瓶而言，透光率和机械性能，尤其是环境应力开裂（ESC），是其重要特性。为此，在PET/CaO颗粒挤出后，采用注塑技术制造瓶坯，并通过拉伸吹塑工艺生产瓶子。加入氧化钙（CaO）后，透光率提高了约25%，环境应力开裂时间从0.3分钟增至11分钟。此外，虽然乙醛（AA）和羧酸（COOH）的分解值随CaO含量的增加而升高，但二甘醇和间苯二甲酸的值没有显著变化。而且，最大结晶温度和结晶度均随CaO含量呈上升趋势。
