{"title":"以1,3-丙二醇为反应介质的聚对苯二甲酸三亚甲酯高效解聚及回收","authors":"Zengwei Guo, Anna Edsberger","doi":"10.1007/s10924-025-03580-x","DOIUrl":null,"url":null,"abstract":"<div><p>The chemical depolymerization of poly(trimethylene terephthalate) (PTT) in 1,3- propanediol (1,3-PDO) was investigated in this study. After depolymerization, the bis-(3-hydroxypropyl terephthalate) (BHPT) was recovered, which can be directly utilized as monomer in the synthesis of PTT. Zinc acetate (Zn(OAc)<sub>2</sub>) was found to be the most suitable catalyst in the depolymerization of PTT in 1,3-PDO since a high monomer yield was achieved and no side reactions were triggered during the depolymerization process. The reaction parameters for depolymerization in the presence of Zn(OAc)<sub>2</sub> catalyst was optimized. Under the optimized depolymerization conditions: reaction temperature of 220 °C, catalyst concentration of 0.2 wt% and a ratio of 1,3-PDO to PTT of 8:1, the recovered BHPT monomer yield was 83 mol% within 45 min. Then, the recovered BHPT monomer was directly regenerated into PTT though a single polycondensation process. Comparing with PTT synthesized from virgin dimethyl terephthalate (DMT), the regenerated PTT shows a better quality in terms of color.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 7","pages":"3443 - 3453"},"PeriodicalIF":5.0000,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10924-025-03580-x.pdf","citationCount":"0","resultStr":"{\"title\":\"Efficient Depolymerization and Recycling of Poly(trimethylene terephthalate) Using 1,3-Propanediol as Reaction Media\",\"authors\":\"Zengwei Guo, Anna Edsberger\",\"doi\":\"10.1007/s10924-025-03580-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The chemical depolymerization of poly(trimethylene terephthalate) (PTT) in 1,3- propanediol (1,3-PDO) was investigated in this study. After depolymerization, the bis-(3-hydroxypropyl terephthalate) (BHPT) was recovered, which can be directly utilized as monomer in the synthesis of PTT. Zinc acetate (Zn(OAc)<sub>2</sub>) was found to be the most suitable catalyst in the depolymerization of PTT in 1,3-PDO since a high monomer yield was achieved and no side reactions were triggered during the depolymerization process. The reaction parameters for depolymerization in the presence of Zn(OAc)<sub>2</sub> catalyst was optimized. Under the optimized depolymerization conditions: reaction temperature of 220 °C, catalyst concentration of 0.2 wt% and a ratio of 1,3-PDO to PTT of 8:1, the recovered BHPT monomer yield was 83 mol% within 45 min. Then, the recovered BHPT monomer was directly regenerated into PTT though a single polycondensation process. Comparing with PTT synthesized from virgin dimethyl terephthalate (DMT), the regenerated PTT shows a better quality in terms of color.</p></div>\",\"PeriodicalId\":659,\"journal\":{\"name\":\"Journal of Polymers and the Environment\",\"volume\":\"33 7\",\"pages\":\"3443 - 3453\"},\"PeriodicalIF\":5.0000,\"publicationDate\":\"2025-05-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s10924-025-03580-x.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Polymers and the Environment\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10924-025-03580-x\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, ENVIRONMENTAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Polymers and the Environment","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10924-025-03580-x","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
Efficient Depolymerization and Recycling of Poly(trimethylene terephthalate) Using 1,3-Propanediol as Reaction Media
The chemical depolymerization of poly(trimethylene terephthalate) (PTT) in 1,3- propanediol (1,3-PDO) was investigated in this study. After depolymerization, the bis-(3-hydroxypropyl terephthalate) (BHPT) was recovered, which can be directly utilized as monomer in the synthesis of PTT. Zinc acetate (Zn(OAc)2) was found to be the most suitable catalyst in the depolymerization of PTT in 1,3-PDO since a high monomer yield was achieved and no side reactions were triggered during the depolymerization process. The reaction parameters for depolymerization in the presence of Zn(OAc)2 catalyst was optimized. Under the optimized depolymerization conditions: reaction temperature of 220 °C, catalyst concentration of 0.2 wt% and a ratio of 1,3-PDO to PTT of 8:1, the recovered BHPT monomer yield was 83 mol% within 45 min. Then, the recovered BHPT monomer was directly regenerated into PTT though a single polycondensation process. Comparing with PTT synthesized from virgin dimethyl terephthalate (DMT), the regenerated PTT shows a better quality in terms of color.
期刊介绍：
The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.
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