Study of the cold crystallization of poly(ethylene terephthalate) at the air interface by ATR spectroscopy.
Saved in:
| Title: | Study of the cold crystallization of poly(ethylene terephthalate) at the air interface by ATR spectroscopy. |
|---|---|
| Authors: | Massa, Carlo Andrea1, Capaccioli, Simone1,2, Manariti, Antonella3, Bertoldo, Monica1 monica.bertoldo@ipcf.cnr.it |
| Source: | European Polymer Journal. Nov2014, Vol. 60, p286-296. 11p. |
| Subjects: | Polyethylene terephthalate, Crystallization, Interfaces (Physical sciences), Attenuated total reflectance, Temperature effect, Thick films, Infrared spectroscopy |
| Abstract: | The cold crystallization at the air interface in fairly thick films of poly(ethylene terephthalate) (PET) was studied by combining attenuated total reflectance (ATR) infrared spectroscopy and X-ray diffraction (XRD) analysis methods. In ATR analysis, Ge and ZnSe were both used as internal reflectance elements to gain information at two different penetration depths from the air interface of the films. Samples were crystallized for different time at the selected temperature so to obtain kinetics plots of the crystallization process. The kinetics obtained by X-ray and ATR analysis on Ge and ZnSe clearly indicate that the crystallization at the film surface is faster than that in the bulk. All kinetics plots were analyzed with Avrami and Malkin macrokinetics models. Finally a method based on the deconvolution of the surface contribution from the bulk was developed to deeply investigate the difference between the crystallization at the air interface and in the bulk. The method is based on the use of two Malkin equations, one describing the behavior at the surface and the other in the bulk. It has allowed to roughly estimate the thickness of the surface layer, which was found to be in the submicrometer range. Finally, the Malkin parameters obtained in the analysis clearly indicated that the crystallization rate at the surface is faster because of the higher nucleation rate in this region than in the bulk. [ABSTRACT FROM AUTHOR] |
| Copyright of European Polymer Journal is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 99282624 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Study of the cold crystallization of poly(ethylene terephthalate) at the air interface by ATR spectroscopy. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Massa%2C+Carlo+Andrea%22">Massa, Carlo Andrea</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Capaccioli%2C+Simone%22">Capaccioli, Simone</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Manariti%2C+Antonella%22">Manariti, Antonella</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Bertoldo%2C+Monica%22">Bertoldo, Monica</searchLink><relatesTo>1</relatesTo><i> monica.bertoldo@ipcf.cnr.it</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22European+Polymer+Journal%22">European Polymer Journal</searchLink>. Nov2014, Vol. 60, p286-296. 11p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Polyethylene+terephthalate%22">Polyethylene terephthalate</searchLink><br /><searchLink fieldCode="DE" term="%22Crystallization%22">Crystallization</searchLink><br /><searchLink fieldCode="DE" term="%22Interfaces+%28Physical+sciences%29%22">Interfaces (Physical sciences)</searchLink><br /><searchLink fieldCode="DE" term="%22Attenuated+total+reflectance%22">Attenuated total reflectance</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+effect%22">Temperature effect</searchLink><br /><searchLink fieldCode="DE" term="%22Thick+films%22">Thick films</searchLink><br /><searchLink fieldCode="DE" term="%22Infrared+spectroscopy%22">Infrared spectroscopy</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The cold crystallization at the air interface in fairly thick films of poly(ethylene terephthalate) (PET) was studied by combining attenuated total reflectance (ATR) infrared spectroscopy and X-ray diffraction (XRD) analysis methods. In ATR analysis, Ge and ZnSe were both used as internal reflectance elements to gain information at two different penetration depths from the air interface of the films. Samples were crystallized for different time at the selected temperature so to obtain kinetics plots of the crystallization process. The kinetics obtained by X-ray and ATR analysis on Ge and ZnSe clearly indicate that the crystallization at the film surface is faster than that in the bulk. All kinetics plots were analyzed with Avrami and Malkin macrokinetics models. Finally a method based on the deconvolution of the surface contribution from the bulk was developed to deeply investigate the difference between the crystallization at the air interface and in the bulk. The method is based on the use of two Malkin equations, one describing the behavior at the surface and the other in the bulk. It has allowed to roughly estimate the thickness of the surface layer, which was found to be in the submicrometer range. Finally, the Malkin parameters obtained in the analysis clearly indicated that the crystallization rate at the surface is faster because of the higher nucleation rate in this region than in the bulk. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of European Polymer Journal is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=99282624 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.eurpolymj.2014.08.012 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 11 StartPage: 286 Subjects: – SubjectFull: Polyethylene terephthalate Type: general – SubjectFull: Crystallization Type: general – SubjectFull: Interfaces (Physical sciences) Type: general – SubjectFull: Attenuated total reflectance Type: general – SubjectFull: Temperature effect Type: general – SubjectFull: Thick films Type: general – SubjectFull: Infrared spectroscopy Type: general Titles: – TitleFull: Study of the cold crystallization of poly(ethylene terephthalate) at the air interface by ATR spectroscopy. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Massa, Carlo Andrea – PersonEntity: Name: NameFull: Capaccioli, Simone – PersonEntity: Name: NameFull: Manariti, Antonella – PersonEntity: Name: NameFull: Bertoldo, Monica IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 11 Text: Nov2014 Type: published Y: 2014 Identifiers: – Type: issn-print Value: 00143057 Numbering: – Type: volume Value: 60 Titles: – TitleFull: European Polymer Journal Type: main |
| ResultId | 1 |
