Polyamide from lactams by reactive rotational molding via anionic ring-opening polymerization: Optimization of processing parameters
A reactive rotational molding (RRM) process was developed to obtain a PA6 by activated anionic ring-opening polymerization of epsilon-caprolactam (APA6). Sodium caprolactamate (C10) and caprolactam magnesium bromide (C1) were employed as catalysts, and difunctional hexamethylene-1,6-dicarbamoylcapro...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Budapest University of Technology
2013-01-01
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| Series: | eXPRESS Polymer Letters |
| Subjects: | |
| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0003806&mi=cd |
| _version_ | 1819175365123244032 |
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| author | N. Barhoumi A. Maazouz M. Jaziri R. Abdelhedi |
| author_facet | N. Barhoumi A. Maazouz M. Jaziri R. Abdelhedi |
| author_sort | N. Barhoumi |
| collection | DOAJ |
| description | A reactive rotational molding (RRM) process was developed to obtain a PA6 by activated anionic ring-opening polymerization of epsilon-caprolactam (APA6). Sodium caprolactamate (C10) and caprolactam magnesium bromide (C1) were employed as catalysts, and difunctional hexamethylene-1,6-dicarbamoylcaprolactam (C20) was used as an activator. The kinetics of the anionic polymerization of !-caprolactam into polyamide 6 was monitored through dynamic rheology and differential scanning calorimetry measurements. The effect of the processing parameters, such as the polymerization temperature, different catalyst/activator combinations and concentrations, on the kinetics of polymerization is discussed. A temperature of 150°C was demonstrated to be the most appropriate. It was also found that crystallization may occur during PA6 polymerization and that the combination C1/C20 was well suited as it permitted a suitable induction time. Isoviscosity curves were drawn in order to determine the available processing window for RRM. The properties of the obtained APA6 were compared with those of a conventionally rotomolded PA6. Results pointed at lower cycle times and increased tensile properties at weak deformation. |
| first_indexed | 2024-12-22T20:53:42Z |
| format | Article |
| id | doaj.art-432453500930458e89daf9c14a8c28c0 |
| institution | Directory Open Access Journal |
| issn | 1788-618X |
| language | English |
| last_indexed | 2024-12-22T20:53:42Z |
| publishDate | 2013-01-01 |
| publisher | Budapest University of Technology |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj.art-432453500930458e89daf9c14a8c28c02022-12-21T18:13:00ZengBudapest University of TechnologyeXPRESS Polymer Letters1788-618X2013-01-0171768710.3144/expresspolymlett.2013.7Polyamide from lactams by reactive rotational molding via anionic ring-opening polymerization: Optimization of processing parametersN. BarhoumiA. MaazouzM. JaziriR. AbdelhediA reactive rotational molding (RRM) process was developed to obtain a PA6 by activated anionic ring-opening polymerization of epsilon-caprolactam (APA6). Sodium caprolactamate (C10) and caprolactam magnesium bromide (C1) were employed as catalysts, and difunctional hexamethylene-1,6-dicarbamoylcaprolactam (C20) was used as an activator. The kinetics of the anionic polymerization of !-caprolactam into polyamide 6 was monitored through dynamic rheology and differential scanning calorimetry measurements. The effect of the processing parameters, such as the polymerization temperature, different catalyst/activator combinations and concentrations, on the kinetics of polymerization is discussed. A temperature of 150°C was demonstrated to be the most appropriate. It was also found that crystallization may occur during PA6 polymerization and that the combination C1/C20 was well suited as it permitted a suitable induction time. Isoviscosity curves were drawn in order to determine the available processing window for RRM. The properties of the obtained APA6 were compared with those of a conventionally rotomolded PA6. Results pointed at lower cycle times and increased tensile properties at weak deformation.http://www.expresspolymlett.com/letolt.php?file=EPL-0003806&mi=cdProcessing technologiesAnionic polymerizationcaprolactamviscosityreactive rotational molding |
| spellingShingle | N. Barhoumi A. Maazouz M. Jaziri R. Abdelhedi Polyamide from lactams by reactive rotational molding via anionic ring-opening polymerization: Optimization of processing parameters eXPRESS Polymer Letters Processing technologies Anionic polymerization caprolactam viscosity reactive rotational molding |
| title | Polyamide from lactams by reactive rotational molding via anionic ring-opening polymerization: Optimization of processing parameters |
| title_full | Polyamide from lactams by reactive rotational molding via anionic ring-opening polymerization: Optimization of processing parameters |
| title_fullStr | Polyamide from lactams by reactive rotational molding via anionic ring-opening polymerization: Optimization of processing parameters |
| title_full_unstemmed | Polyamide from lactams by reactive rotational molding via anionic ring-opening polymerization: Optimization of processing parameters |
| title_short | Polyamide from lactams by reactive rotational molding via anionic ring-opening polymerization: Optimization of processing parameters |
| title_sort | polyamide from lactams by reactive rotational molding via anionic ring opening polymerization optimization of processing parameters |
| topic | Processing technologies Anionic polymerization caprolactam viscosity reactive rotational molding |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0003806&mi=cd |
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