Tarek Salem, Mustafa Elshahat, A. A. Saafan, El-Refaie Kenawy
{"title":"新型共催化体系在聚对苯二甲酸乙酯废弃物化学回收中的应用","authors":"Tarek Salem, Mustafa Elshahat, A. A. Saafan, El-Refaie Kenawy","doi":"10.1007/s13726-024-01429-z","DOIUrl":null,"url":null,"abstract":"<div><p>Glycolysis of various PET waste materials reduces environmental threats and recovers the starting raw materials, which in turn accelerates the process of rapid and selective depolymerization of PET waste. This chemical recycling process is crucial for the circular economy of plastic waste. The conversion of PET is carried out with two different types of alcoholysis solvents (ethylene glycol and diethylene glycol) in the presence of a new catalytic system (zinc acetate with dimethyl aniline as co-catalyst), aiming to maximize the conversion and degradation of PET waste for high-yield production of intermediate monomers. The recovered raw materials were used as precursors to prepare unsaturated polyester resins with maleic anhydride and styrene monomers as reactive diluents. In this study, two different grades of polyethylene terephthalate (PET) waste materials were depolymerized through glycolysis to produce bis-hydroxyethyl terephthalate (BHET) using ethylene glycol (EG) or bis (2(2-hydroxy ethoxy) ethyl) terephthalate (BHDET) using diethylene glycol (DEG). The effects of reaction temperature, amount of co-catalyst, glycolysis time, and glycol/PET ratio on the conversion of PET waste materials and the isolated yield of intermediate monomers BHET and BHDET were investigated. FTIR, <sup>1</sup>H NMR, <sup>13</sup>C NMR, GPC, DSC, and mechanical testing were used to characterize the properties of the reaction products in each step. It was found that the glycolysis of PET waste in the presence of a co-catalytic system proceeded faster than the zinc acetate-catalyzed reaction, as well as the unsaturated polyester resins synthesis.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"34 9","pages":"1305 - 1319"},"PeriodicalIF":2.8000,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Chemical recycling of poly(ethylene terephthalate) waste using a new co-catalytic system\",\"authors\":\"Tarek Salem, Mustafa Elshahat, A. A. Saafan, El-Refaie Kenawy\",\"doi\":\"10.1007/s13726-024-01429-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Glycolysis of various PET waste materials reduces environmental threats and recovers the starting raw materials, which in turn accelerates the process of rapid and selective depolymerization of PET waste. This chemical recycling process is crucial for the circular economy of plastic waste. The conversion of PET is carried out with two different types of alcoholysis solvents (ethylene glycol and diethylene glycol) in the presence of a new catalytic system (zinc acetate with dimethyl aniline as co-catalyst), aiming to maximize the conversion and degradation of PET waste for high-yield production of intermediate monomers. The recovered raw materials were used as precursors to prepare unsaturated polyester resins with maleic anhydride and styrene monomers as reactive diluents. In this study, two different grades of polyethylene terephthalate (PET) waste materials were depolymerized through glycolysis to produce bis-hydroxyethyl terephthalate (BHET) using ethylene glycol (EG) or bis (2(2-hydroxy ethoxy) ethyl) terephthalate (BHDET) using diethylene glycol (DEG). The effects of reaction temperature, amount of co-catalyst, glycolysis time, and glycol/PET ratio on the conversion of PET waste materials and the isolated yield of intermediate monomers BHET and BHDET were investigated. FTIR, <sup>1</sup>H NMR, <sup>13</sup>C NMR, GPC, DSC, and mechanical testing were used to characterize the properties of the reaction products in each step. It was found that the glycolysis of PET waste in the presence of a co-catalytic system proceeded faster than the zinc acetate-catalyzed reaction, as well as the unsaturated polyester resins synthesis.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":601,\"journal\":{\"name\":\"Iranian Polymer Journal\",\"volume\":\"34 9\",\"pages\":\"1305 - 1319\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2025-01-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Iranian Polymer Journal\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s13726-024-01429-z\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iranian Polymer Journal","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s13726-024-01429-z","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
Chemical recycling of poly(ethylene terephthalate) waste using a new co-catalytic system
Glycolysis of various PET waste materials reduces environmental threats and recovers the starting raw materials, which in turn accelerates the process of rapid and selective depolymerization of PET waste. This chemical recycling process is crucial for the circular economy of plastic waste. The conversion of PET is carried out with two different types of alcoholysis solvents (ethylene glycol and diethylene glycol) in the presence of a new catalytic system (zinc acetate with dimethyl aniline as co-catalyst), aiming to maximize the conversion and degradation of PET waste for high-yield production of intermediate monomers. The recovered raw materials were used as precursors to prepare unsaturated polyester resins with maleic anhydride and styrene monomers as reactive diluents. In this study, two different grades of polyethylene terephthalate (PET) waste materials were depolymerized through glycolysis to produce bis-hydroxyethyl terephthalate (BHET) using ethylene glycol (EG) or bis (2(2-hydroxy ethoxy) ethyl) terephthalate (BHDET) using diethylene glycol (DEG). The effects of reaction temperature, amount of co-catalyst, glycolysis time, and glycol/PET ratio on the conversion of PET waste materials and the isolated yield of intermediate monomers BHET and BHDET were investigated. FTIR, 1H NMR, 13C NMR, GPC, DSC, and mechanical testing were used to characterize the properties of the reaction products in each step. It was found that the glycolysis of PET waste in the presence of a co-catalytic system proceeded faster than the zinc acetate-catalyzed reaction, as well as the unsaturated polyester resins synthesis.
期刊介绍：
Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
