Influence of processing on the ethylene-vinyl alcohol (EVOH) properties: Application of the successive self-nucleation and annealing (SSA) technique
Films of EVOH copolymers, processed three times by twin-screw extrusion were prepared using a cast-film line. The variation on the melt flow rate (MFR) and rheological behaviour of the films were determined, as well as the thermal properties assessed by differential scanning calorimetry (DSC) and dy...
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| Format: | Article |
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| Language: | English |
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Budapest University of Technology and Economics
2010-03-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0001274&mi=cd |
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| description | Films of EVOH copolymers, processed three times by twin-screw extrusion were prepared using a cast-film line. The variation on the melt flow rate (MFR) and rheological behaviour of the films were determined, as well as the thermal properties assessed by differential scanning calorimetry (DSC) and dynamic-mechanical thermal analysis (DMTA). As the results showed that the reprocessing induced an increase in the viscosity and orientation of the films, it was suggested that structural modifications from chain-extension or cross-linking reactions promoted by hydroxyl and residual acetoxyl groups, could be occurring. The successive self-nucleation and annealing (SSA) technique was applied, evidencing the structural modifications on the EVOH copolymer. |
| format | Article |
| id | doaj-art-a2a4f7a018704650981ea11de32b8b9e |
| institution | Kabale University |
| issn | 1788-618X |
| language | English |
| publishDate | 2010-03-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-a2a4f7a018704650981ea11de32b8b9e2025-08-20T03:37:03ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2010-03-014315316010.3144/expresspolymlett.2010.20Influence of processing on the ethylene-vinyl alcohol (EVOH) properties: Application of the successive self-nucleation and annealing (SSA) techniqueFilms of EVOH copolymers, processed three times by twin-screw extrusion were prepared using a cast-film line. The variation on the melt flow rate (MFR) and rheological behaviour of the films were determined, as well as the thermal properties assessed by differential scanning calorimetry (DSC) and dynamic-mechanical thermal analysis (DMTA). As the results showed that the reprocessing induced an increase in the viscosity and orientation of the films, it was suggested that structural modifications from chain-extension or cross-linking reactions promoted by hydroxyl and residual acetoxyl groups, could be occurring. The successive self-nucleation and annealing (SSA) technique was applied, evidencing the structural modifications on the EVOH copolymer.http://www.expresspolymlett.com/letolt.php?file=EPL-0001274&mi=cdProcessing technologiesEVOHSSAprocessing-structure relation |
| spellingShingle | Influence of processing on the ethylene-vinyl alcohol (EVOH) properties: Application of the successive self-nucleation and annealing (SSA) technique eXPRESS Polymer Letters Processing technologies EVOH SSA processing-structure relation |
| title | Influence of processing on the ethylene-vinyl alcohol (EVOH) properties: Application of the successive self-nucleation and annealing (SSA) technique |
| title_full | Influence of processing on the ethylene-vinyl alcohol (EVOH) properties: Application of the successive self-nucleation and annealing (SSA) technique |
| title_fullStr | Influence of processing on the ethylene-vinyl alcohol (EVOH) properties: Application of the successive self-nucleation and annealing (SSA) technique |
| title_full_unstemmed | Influence of processing on the ethylene-vinyl alcohol (EVOH) properties: Application of the successive self-nucleation and annealing (SSA) technique |
| title_short | Influence of processing on the ethylene-vinyl alcohol (EVOH) properties: Application of the successive self-nucleation and annealing (SSA) technique |
| title_sort | influence of processing on the ethylene vinyl alcohol evoh properties application of the successive self nucleation and annealing ssa technique |
| topic | Processing technologies EVOH SSA processing-structure relation |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0001274&mi=cd |