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Development of PLA/EVA Reactive Blends for Heat-Shrinkable Film

Heat-shrinkable films have widely been used for various applications such as shrinkable labels and cap seals. These plastics have generally a short life. The biodegradable polymers can thus be an ideal candidate for such applications. This work aimed to study the stretching and shrinking ratio of po...

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Autores principales: Khankrua, Rattikarn, Pongpanit, Tanyawan, Paneetjit, Ponchai, Boonmark, Rungnapha, Seadan, Manus, Suttiruengwong, Supakij
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6961007/
https://www.ncbi.nlm.nih.gov/pubmed/31766699
http://dx.doi.org/10.3390/polym11121925
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author Khankrua, Rattikarn
Pongpanit, Tanyawan
Paneetjit, Ponchai
Boonmark, Rungnapha
Seadan, Manus
Suttiruengwong, Supakij
author_facet Khankrua, Rattikarn
Pongpanit, Tanyawan
Paneetjit, Ponchai
Boonmark, Rungnapha
Seadan, Manus
Suttiruengwong, Supakij
author_sort Khankrua, Rattikarn
collection PubMed
description Heat-shrinkable films have widely been used for various applications such as shrinkable labels and cap seals. These plastics have generally a short life. The biodegradable polymers can thus be an ideal candidate for such applications. This work aimed to study the stretching and shrinking ratio of poly(lactic acid)/ethylene vinyl acetate through reactive blends system for heat-shrinkable films application. The reactive agents, Joncryl(®) and Perkadox were used as in situ compatibilizers. PLA/EVA with 100/0, 97/3, 95/5, 93/7, and 90/10 ratios were prepared in the twin screw extruder. Neat PLA and PLA/EVA films were fabricated by blown film extrusion. The results revealed that the elongation at break of PLA in the TD direction was improved when adding EVA. PLA and EVA film with 0.1 phr of Perkadox was found to be sufficient as evident by FESEM micrograph and DMTA results. The films were stretched and shrunk at a temperature of 70 °C. The percentage of shrinkage of the stretched PLA/EVA reactive blend films, two and three times were, 100%, approximately. On the other hand, the four-times stretched films shrunk less than 100% because of the excessive stretching, which resulted in film breakage and defect.
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spelling pubmed-69610072020-01-24 Development of PLA/EVA Reactive Blends for Heat-Shrinkable Film Khankrua, Rattikarn Pongpanit, Tanyawan Paneetjit, Ponchai Boonmark, Rungnapha Seadan, Manus Suttiruengwong, Supakij Polymers (Basel) Article Heat-shrinkable films have widely been used for various applications such as shrinkable labels and cap seals. These plastics have generally a short life. The biodegradable polymers can thus be an ideal candidate for such applications. This work aimed to study the stretching and shrinking ratio of poly(lactic acid)/ethylene vinyl acetate through reactive blends system for heat-shrinkable films application. The reactive agents, Joncryl(®) and Perkadox were used as in situ compatibilizers. PLA/EVA with 100/0, 97/3, 95/5, 93/7, and 90/10 ratios were prepared in the twin screw extruder. Neat PLA and PLA/EVA films were fabricated by blown film extrusion. The results revealed that the elongation at break of PLA in the TD direction was improved when adding EVA. PLA and EVA film with 0.1 phr of Perkadox was found to be sufficient as evident by FESEM micrograph and DMTA results. The films were stretched and shrunk at a temperature of 70 °C. The percentage of shrinkage of the stretched PLA/EVA reactive blend films, two and three times were, 100%, approximately. On the other hand, the four-times stretched films shrunk less than 100% because of the excessive stretching, which resulted in film breakage and defect. MDPI 2019-11-22 /pmc/articles/PMC6961007/ /pubmed/31766699 http://dx.doi.org/10.3390/polym11121925 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Khankrua, Rattikarn
Pongpanit, Tanyawan
Paneetjit, Ponchai
Boonmark, Rungnapha
Seadan, Manus
Suttiruengwong, Supakij
Development of PLA/EVA Reactive Blends for Heat-Shrinkable Film
title Development of PLA/EVA Reactive Blends for Heat-Shrinkable Film
title_full Development of PLA/EVA Reactive Blends for Heat-Shrinkable Film
title_fullStr Development of PLA/EVA Reactive Blends for Heat-Shrinkable Film
title_full_unstemmed Development of PLA/EVA Reactive Blends for Heat-Shrinkable Film
title_short Development of PLA/EVA Reactive Blends for Heat-Shrinkable Film
title_sort development of pla/eva reactive blends for heat-shrinkable film
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6961007/
https://www.ncbi.nlm.nih.gov/pubmed/31766699
http://dx.doi.org/10.3390/polym11121925
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