Pyrolysis and flame retardant behavior of a novel compound with multiple phosphaphenanthrene groups in epoxy thermosets.
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| Title: | Pyrolysis and flame retardant behavior of a novel compound with multiple phosphaphenanthrene groups in epoxy thermosets. |
|---|---|
| Authors: | Qiu, Yong1,2, Liu, Zhen2, Qian, Lijun2 qianlj@th.btbu.edu.cn, Hao, Jianwei1 hjw@bit.edu.cn |
| Source: | Journal of Analytical & Applied Pyrolysis. Sep2017, Vol. 127, p23-30. 8p. |
| Subjects: | Pyrolysis, Epoxy insulators, Combustion, Thermosetting polymers, Oxygen index of materials, Phenol derivatives |
| Abstract: | A novel flame retardant compound (TDBA) with multiple phosphaphenanthrene groups was synthesized and confirmed by chemical structural and elemental characterization. Contrastive analysis on thermal decomposition behavior showed that the two kinds of bridge bonds linking phosphaphenanthrene groups in TDBA caused a wider decomposition temperature range, contributing to inhibiting combustion in relatively longer time. The application of TDBA in epoxy thermosets suggested that, TDBA capacitated the limited oxygen index of thermosets to surpass 35% and 4 wt.% or more loadings of TDBA made 4,4′-diamino-diphenyl methane curing thermosets pass UL94 V-0 rating especially. During combustion, the incorporated TDBA induced the matrix to decompose earlier, reduced the fuels production, reduced burning intensity and inhibited the combustion reaction of fuels in gaseous phase, and promoted the charring behavior of thermosets in condensed phase. The pyrolysis of TDBA proceeded along two main directions, namely substituted phosphaphenanthrene and bisphenol-A. Through releasing massive phenolic derivatives, PO free radicals and other certain phosphorus-containing substances, TDBA is capable to exert free radical quenching effect in gaseous phase, and to promote charring behavior to form compact residue with barrier effect on heat and fuels transportation in condensed phase. This bi-phase joint action mode from TDBA endowed epoxy thermosets with excellent flame retardancy. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Analytical & Applied Pyrolysis 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 |
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| Header | DbId: egs DbLabel: Engineering Source An: 125286367 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Pyrolysis and flame retardant behavior of a novel compound with multiple phosphaphenanthrene groups in epoxy thermosets. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Qiu%2C+Yong%22">Qiu, Yong</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Liu%2C+Zhen%22">Liu, Zhen</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Qian%2C+Lijun%22">Qian, Lijun</searchLink><relatesTo>2</relatesTo><i> qianlj@th.btbu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Hao%2C+Jianwei%22">Hao, Jianwei</searchLink><relatesTo>1</relatesTo><i> hjw@bit.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Analytical+%26+Applied+Pyrolysis%22">Journal of Analytical & Applied Pyrolysis</searchLink>. Sep2017, Vol. 127, p23-30. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Pyrolysis%22">Pyrolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Epoxy+insulators%22">Epoxy insulators</searchLink><br /><searchLink fieldCode="DE" term="%22Combustion%22">Combustion</searchLink><br /><searchLink fieldCode="DE" term="%22Thermosetting+polymers%22">Thermosetting polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+index+of+materials%22">Oxygen index of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Phenol+derivatives%22">Phenol derivatives</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A novel flame retardant compound (TDBA) with multiple phosphaphenanthrene groups was synthesized and confirmed by chemical structural and elemental characterization. Contrastive analysis on thermal decomposition behavior showed that the two kinds of bridge bonds linking phosphaphenanthrene groups in TDBA caused a wider decomposition temperature range, contributing to inhibiting combustion in relatively longer time. The application of TDBA in epoxy thermosets suggested that, TDBA capacitated the limited oxygen index of thermosets to surpass 35% and 4 wt.% or more loadings of TDBA made 4,4′-diamino-diphenyl methane curing thermosets pass UL94 V-0 rating especially. During combustion, the incorporated TDBA induced the matrix to decompose earlier, reduced the fuels production, reduced burning intensity and inhibited the combustion reaction of fuels in gaseous phase, and promoted the charring behavior of thermosets in condensed phase. The pyrolysis of TDBA proceeded along two main directions, namely substituted phosphaphenanthrene and bisphenol-A. Through releasing massive phenolic derivatives, PO free radicals and other certain phosphorus-containing substances, TDBA is capable to exert free radical quenching effect in gaseous phase, and to promote charring behavior to form compact residue with barrier effect on heat and fuels transportation in condensed phase. This bi-phase joint action mode from TDBA endowed epoxy thermosets with excellent flame retardancy. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Analytical & Applied Pyrolysis 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.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.jaap.2017.09.006 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 23 Subjects: – SubjectFull: Pyrolysis Type: general – SubjectFull: Epoxy insulators Type: general – SubjectFull: Combustion Type: general – SubjectFull: Thermosetting polymers Type: general – SubjectFull: Oxygen index of materials Type: general – SubjectFull: Phenol derivatives Type: general Titles: – TitleFull: Pyrolysis and flame retardant behavior of a novel compound with multiple phosphaphenanthrene groups in epoxy thermosets. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Qiu, Yong – PersonEntity: Name: NameFull: Liu, Zhen – PersonEntity: Name: NameFull: Qian, Lijun – PersonEntity: Name: NameFull: Hao, Jianwei IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Text: Sep2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 01652370 Numbering: – Type: volume Value: 127 Titles: – TitleFull: Journal of Analytical & Applied Pyrolysis Type: main |
| ResultId | 1 |
