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A more environmentally friendly path to the family of the flame-resistant semi-ladder "Lola" fibers.

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Title: A more environmentally friendly path to the family of the flame-resistant semi-ladder "Lola" fibers.
Authors: Skvortsov, Ivan Y.1 (AUTHOR), Ponomarev, Igor I.2 (AUTHOR), Varfolomeeva, Lydia A.1 (AUTHOR), Kuzin, Mikhail S.1 (AUTHOR), Razorenov, Dmitry Y.2 (AUTHOR), Skupov, Kirill M.1,2 (AUTHOR) kskupov@ineos.ac.ru, Ponomarev, Ivan I.2 (AUTHOR), Zuev, Kirill V.1 (AUTHOR), Levin, Ivan S.1 (AUTHOR), Shandryuk, GeorgiyA.1 (AUTHOR), Kulichikhin, Valery G.1 (AUTHOR)
Source: Polymer. Apr2022, Vol. 247, pN.PAG-N.PAG. 1p.
Subjects: Fibers, Heat treatment, Tensile strength, Elastic modulus
Abstract: High strength flame-resistant semi-ladder fibers of the "Lola" family (PNBI) have been obtained by an acid-free and more environmentally friendly method with controlled heating of precursor fibers in an inert atmosphere. The suggested two-step method consists in preparation of a prepolymer (PANI-O) in N-methylpyrrolidone. The prepared PANI-O dopes were additionally modified by introducing a certain part of a non-solvent (ethanol) to smooth the interdiffusion mass-transfer and prepare defectless precursor fibers. A detailed study of the thermal behavior of the PANI-O fibers by DSC and TGA shows that the maximum exothermic effect is observed at 320–370 °C, associated with formation of a ladder structure, i.e., transformation of the PANI-O into the PNBI-O. As a result, after the heat treatment, the flame-resistant PNBI "Lola" family fibers were obtained with an oxygen index of up to 83, tensile strength of ∼500 MPa, relative elongation of ∼5% and elastic modulus of ∼12 GPa. Flame-resistant semi-ladder PNBI fibers were obtained by acid-free environmentally friendly way through PANI-O prepolymer stage. [Display omitted] • PNBI fibers were obtained by an environmentally friendly way. • PNBI fibers were obtained through a PANI-O prepolymer stage. • Ethanol addition leads to defectless pre-polymer fibers by dry-wet spinning. • LOI of 83 for the H 3 PO 4 impregnated PNBI fibers was obtained. • Outstanding mechanical properties were recorded for the obtained PNBI fibers. [ABSTRACT FROM AUTHOR]
Copyright of Polymer 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
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Header DbId: egs
DbLabel: Engineering Source
An: 156374422
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: A more environmentally friendly path to the family of the flame-resistant semi-ladder "Lola" fibers.
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  Data: <searchLink fieldCode="AR" term="%22Skvortsov%2C+Ivan+Y%2E%22">Skvortsov, Ivan Y.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ponomarev%2C+Igor+I%2E%22">Ponomarev, Igor I.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Varfolomeeva%2C+Lydia+A%2E%22">Varfolomeeva, Lydia A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kuzin%2C+Mikhail+S%2E%22">Kuzin, Mikhail S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Razorenov%2C+Dmitry+Y%2E%22">Razorenov, Dmitry Y.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Skupov%2C+Kirill+M%2E%22">Skupov, Kirill M.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> kskupov@ineos.ac.ru</i><br /><searchLink fieldCode="AR" term="%22Ponomarev%2C+Ivan+I%2E%22">Ponomarev, Ivan I.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zuev%2C+Kirill+V%2E%22">Zuev, Kirill V.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Levin%2C+Ivan+S%2E%22">Levin, Ivan S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shandryuk%2C+GeorgiyA%2E%22">Shandryuk, GeorgiyA.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kulichikhin%2C+Valery+G%2E%22">Kulichikhin, Valery G.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Polymer%22">Polymer</searchLink>. Apr2022, Vol. 247, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Fibers%22">Fibers</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+treatment%22">Heat treatment</searchLink><br /><searchLink fieldCode="DE" term="%22Tensile+strength%22">Tensile strength</searchLink><br /><searchLink fieldCode="DE" term="%22Elastic+modulus%22">Elastic modulus</searchLink>
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  Data: High strength flame-resistant semi-ladder fibers of the "Lola" family (PNBI) have been obtained by an acid-free and more environmentally friendly method with controlled heating of precursor fibers in an inert atmosphere. The suggested two-step method consists in preparation of a prepolymer (PANI-O) in N-methylpyrrolidone. The prepared PANI-O dopes were additionally modified by introducing a certain part of a non-solvent (ethanol) to smooth the interdiffusion mass-transfer and prepare defectless precursor fibers. A detailed study of the thermal behavior of the PANI-O fibers by DSC and TGA shows that the maximum exothermic effect is observed at 320–370 °C, associated with formation of a ladder structure, i.e., transformation of the PANI-O into the PNBI-O. As a result, after the heat treatment, the flame-resistant PNBI "Lola" family fibers were obtained with an oxygen index of up to 83, tensile strength of ∼500 MPa, relative elongation of ∼5% and elastic modulus of ∼12 GPa. Flame-resistant semi-ladder PNBI fibers were obtained by acid-free environmentally friendly way through PANI-O prepolymer stage. [Display omitted] • PNBI fibers were obtained by an environmentally friendly way. • PNBI fibers were obtained through a PANI-O prepolymer stage. • Ethanol addition leads to defectless pre-polymer fibers by dry-wet spinning. • LOI of 83 for the H 3 PO 4 impregnated PNBI fibers was obtained. • Outstanding mechanical properties were recorded for the obtained PNBI fibers. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Polymer 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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        Value: 10.1016/j.polymer.2022.124793
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Heat treatment
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      – SubjectFull: Tensile strength
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      – SubjectFull: Elastic modulus
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              Text: Apr2022
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