{"title":"含有吡唑阻水性聚氨酯分散体和再生多元醇的聚氨酯前驱体在光学聚对苯二甲酸乙酯薄膜中的应用","authors":"Yoon-Jung Jang, Jeong-Sam Kim, Soo-Young Park","doi":"10.1007/s13233-025-00414-6","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, we investigated the application of polyurethane (PU) coating on poly(ethylene terephthalate) (PET) films for optical film applications using pyrazole-blocked waterborne PU dispersion (PUD) (PUDpy) and PET-recycled polyol. Real-time Fourier transform infrared spectroscopy, dynamic mechanical analysis, ultra-micro hardness tests, ellipsometry and ultraviolet–visible spectroscopy were used to analyse the deblocking process for PUDpy, the reaction between PUDpy and polyol and the optical properties of the PU-coated PET film. The PU-coated PET films prepared in this study were clear, smooth and transparent enough for optical film applications. The deblocking of pyrazole and activation of isocyanate (NCO) groups started at 100 °C and ended at 180 °C, and the PU reaction between the activated NCO and polyol started immediately after NCO activation and lasted up to a maximum operation temperature of 240 °C. Notably, the PU reaction continued even after cooling to room temperature (25 °C), thereby necessitating a post-curing process to achieve complete curing. As the polyol content in the coating layer increased, the refractive index increased, whereas the coating layer hardness decreased. The evaluation of the compositional effects of the PUDpy:polyol precursor solution indicated that the optimal optical and mechanical properties of the PU-coated PET film were achieved when equal amounts of PUDpy and polyol were used in the precursor solution.</p><h3>Graphical abstract</h3><p>The polyurethane (PU)-coated PET optical films were prepared using pyrazole-blocked waterborne PU dispersion (PUD) (PUDpy) and PET-recycled polyol.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":688,"journal":{"name":"Macromolecular Research","volume":"33 9","pages":"1175 - 1184"},"PeriodicalIF":3.4000,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Application of polyurethane precursors comprising pyrazole-blocking waterborne polyurethane dispersion and recycled polyol to optical poly(ethylene terephthalate) films\",\"authors\":\"Yoon-Jung Jang, Jeong-Sam Kim, Soo-Young Park\",\"doi\":\"10.1007/s13233-025-00414-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this study, we investigated the application of polyurethane (PU) coating on poly(ethylene terephthalate) (PET) films for optical film applications using pyrazole-blocked waterborne PU dispersion (PUD) (PUDpy) and PET-recycled polyol. Real-time Fourier transform infrared spectroscopy, dynamic mechanical analysis, ultra-micro hardness tests, ellipsometry and ultraviolet–visible spectroscopy were used to analyse the deblocking process for PUDpy, the reaction between PUDpy and polyol and the optical properties of the PU-coated PET film. The PU-coated PET films prepared in this study were clear, smooth and transparent enough for optical film applications. The deblocking of pyrazole and activation of isocyanate (NCO) groups started at 100 °C and ended at 180 °C, and the PU reaction between the activated NCO and polyol started immediately after NCO activation and lasted up to a maximum operation temperature of 240 °C. Notably, the PU reaction continued even after cooling to room temperature (25 °C), thereby necessitating a post-curing process to achieve complete curing. As the polyol content in the coating layer increased, the refractive index increased, whereas the coating layer hardness decreased. The evaluation of the compositional effects of the PUDpy:polyol precursor solution indicated that the optimal optical and mechanical properties of the PU-coated PET film were achieved when equal amounts of PUDpy and polyol were used in the precursor solution.</p><h3>Graphical abstract</h3><p>The polyurethane (PU)-coated PET optical films were prepared using pyrazole-blocked waterborne PU dispersion (PUD) (PUDpy) and PET-recycled polyol.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":688,\"journal\":{\"name\":\"Macromolecular Research\",\"volume\":\"33 9\",\"pages\":\"1175 - 1184\"},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2025-05-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Macromolecular Research\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s13233-025-00414-6\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Macromolecular Research","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s13233-025-00414-6","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
Application of polyurethane precursors comprising pyrazole-blocking waterborne polyurethane dispersion and recycled polyol to optical poly(ethylene terephthalate) films
In this study, we investigated the application of polyurethane (PU) coating on poly(ethylene terephthalate) (PET) films for optical film applications using pyrazole-blocked waterborne PU dispersion (PUD) (PUDpy) and PET-recycled polyol. Real-time Fourier transform infrared spectroscopy, dynamic mechanical analysis, ultra-micro hardness tests, ellipsometry and ultraviolet–visible spectroscopy were used to analyse the deblocking process for PUDpy, the reaction between PUDpy and polyol and the optical properties of the PU-coated PET film. The PU-coated PET films prepared in this study were clear, smooth and transparent enough for optical film applications. The deblocking of pyrazole and activation of isocyanate (NCO) groups started at 100 °C and ended at 180 °C, and the PU reaction between the activated NCO and polyol started immediately after NCO activation and lasted up to a maximum operation temperature of 240 °C. Notably, the PU reaction continued even after cooling to room temperature (25 °C), thereby necessitating a post-curing process to achieve complete curing. As the polyol content in the coating layer increased, the refractive index increased, whereas the coating layer hardness decreased. The evaluation of the compositional effects of the PUDpy:polyol precursor solution indicated that the optimal optical and mechanical properties of the PU-coated PET film were achieved when equal amounts of PUDpy and polyol were used in the precursor solution.
Graphical abstract
The polyurethane (PU)-coated PET optical films were prepared using pyrazole-blocked waterborne PU dispersion (PUD) (PUDpy) and PET-recycled polyol.
期刊介绍：
Original research on all aspects of polymer science, engineering and technology, including nanotechnology
Presents original research articles on all aspects of polymer science, engineering and technology
Coverage extends to such topics as nanotechnology, biotechnology and information technology
The English-language journal of the Polymer Society of Korea
Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
