Increased processing temperature assisted reactive toughening of poly(lactic acid)
Toughening efficiency of poly(ethylene-n-butylene-acrylate-co-glycidyl methacrylate) (EBA-GMA) in poly(lactic acid) (PLA) matrix has been found to significantly increase at elevated blending temperature. In the case of PLA/EBAGMA blends having 10.0 or 12.5 wt% EBA-GMA contents, the accelerated PLA d...
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| Format: | Article |
| Language: | English |
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Budapest University of Technology and Economics
2023-02-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0012203&mi=cd |
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| author | Nóra Lukács Kata Enikő Decsov Béla Molnár Ferenc Ronkay Katalin Bordácsné Bocz |
| author_facet | Nóra Lukács Kata Enikő Decsov Béla Molnár Ferenc Ronkay Katalin Bordácsné Bocz |
| author_sort | Nóra Lukács |
| collection | DOAJ |
| description | Toughening efficiency of poly(ethylene-n-butylene-acrylate-co-glycidyl methacrylate) (EBA-GMA) in poly(lactic acid) (PLA) matrix has been found to significantly increase at elevated blending temperature. In the case of PLA/EBAGMA blends having 10.0 or 12.5 wt% EBA-GMA contents, the accelerated PLA degradation at raised processing temperature resulted in reduced mechanical performance. At 15.0 wt% EBA-GMA ratio, however, increased elongation and by 250% improved notched Izod impact strength was achieved when the blending temperature was raised from 240 to 260 °C. This beneficial effect is attributed to the accelerated compatibilization reactions between the components in the presence of shortchain PLA molecules, which allow the rapid formation of a toughening enhancer interphase (TEI) during melt processing. As a result, the brittle-ductile transition can be reached at lower elastomer content than expected. Decreased melt flow index (MFI) values besides stabilized blend morphology indicated efficient PLA–EBA-GMA compatibilization at elevated processing temperature. Accordingly, enhanced nucleation ability of the PLA/EBA-GMA interphase and hindered chain crystallization of PLA were found by differential scanning calorimetry (DSC) analyses. In association with the intensified compatibilization reactions cross-linking of the terpolymer was also revealed using the thermally stimulated depolarization current (TSDC) technique. |
| format | Article |
| id | doaj-art-ea4aa51b9a0e424bbcb5fabeba68eb82 |
| institution | DOAJ |
| issn | 1788-618X |
| language | English |
| publishDate | 2023-02-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-ea4aa51b9a0e424bbcb5fabeba68eb822025-08-20T03:19:56ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2023-02-0117216918010.3144/expresspolymlett.2023.12Increased processing temperature assisted reactive toughening of poly(lactic acid)Nóra LukácsKata Enikő DecsovBéla MolnárFerenc RonkayKatalin Bordácsné BoczToughening efficiency of poly(ethylene-n-butylene-acrylate-co-glycidyl methacrylate) (EBA-GMA) in poly(lactic acid) (PLA) matrix has been found to significantly increase at elevated blending temperature. In the case of PLA/EBAGMA blends having 10.0 or 12.5 wt% EBA-GMA contents, the accelerated PLA degradation at raised processing temperature resulted in reduced mechanical performance. At 15.0 wt% EBA-GMA ratio, however, increased elongation and by 250% improved notched Izod impact strength was achieved when the blending temperature was raised from 240 to 260 °C. This beneficial effect is attributed to the accelerated compatibilization reactions between the components in the presence of shortchain PLA molecules, which allow the rapid formation of a toughening enhancer interphase (TEI) during melt processing. As a result, the brittle-ductile transition can be reached at lower elastomer content than expected. Decreased melt flow index (MFI) values besides stabilized blend morphology indicated efficient PLA–EBA-GMA compatibilization at elevated processing temperature. Accordingly, enhanced nucleation ability of the PLA/EBA-GMA interphase and hindered chain crystallization of PLA were found by differential scanning calorimetry (DSC) analyses. In association with the intensified compatibilization reactions cross-linking of the terpolymer was also revealed using the thermally stimulated depolarization current (TSDC) technique.http://www.expresspolymlett.com/letolt.php?file=EPL-0012203&mi=cdbiopolymers, biocompositesprocessing technologiesmechanical propertiesthermal properties |
| spellingShingle | Nóra Lukács Kata Enikő Decsov Béla Molnár Ferenc Ronkay Katalin Bordácsné Bocz Increased processing temperature assisted reactive toughening of poly(lactic acid) eXPRESS Polymer Letters biopolymers, biocomposites processing technologies mechanical properties thermal properties |
| title | Increased processing temperature assisted reactive toughening of poly(lactic acid) |
| title_full | Increased processing temperature assisted reactive toughening of poly(lactic acid) |
| title_fullStr | Increased processing temperature assisted reactive toughening of poly(lactic acid) |
| title_full_unstemmed | Increased processing temperature assisted reactive toughening of poly(lactic acid) |
| title_short | Increased processing temperature assisted reactive toughening of poly(lactic acid) |
| title_sort | increased processing temperature assisted reactive toughening of poly lactic acid |
| topic | biopolymers, biocomposites processing technologies mechanical properties thermal properties |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0012203&mi=cd |
| work_keys_str_mv | AT noralukacs increasedprocessingtemperatureassistedreactivetougheningofpolylacticacid AT kataenikodecsov increasedprocessingtemperatureassistedreactivetougheningofpolylacticacid AT belamolnar increasedprocessingtemperatureassistedreactivetougheningofpolylacticacid AT ferencronkay increasedprocessingtemperatureassistedreactivetougheningofpolylacticacid AT katalinbordacsnebocz increasedprocessingtemperatureassistedreactivetougheningofpolylacticacid |