The effect of molecular weight and hydrolysis degree of poly(vinyl alcohol)(PVA) on the thermal and mechanical properties of poly(lactic acid)/PVA blends
Abstract The effect of molecular weights and hydrolysis degrees (HD) of polyvinyl alcohol (PVA) on thermal and mechanical properties and crystallinity of polylactic acid (PLA)/PVA blends was investigated. Blends were prepared by the melt blending method using PLA/PVA ratios: 80/20, 90/10 and 97/3 w...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Polímeros
2018-05-01
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| Series: | Polímeros |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282018005002106&lng=en&tlng=en |
| _version_ | 1818506394102398976 |
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| author | Iván Restrepo Carlos Medina Viviana Meruane Ali Akbari-Fakhrabadi Paulo Flores Saddys Rodríguez-Llamazares |
| author_facet | Iván Restrepo Carlos Medina Viviana Meruane Ali Akbari-Fakhrabadi Paulo Flores Saddys Rodríguez-Llamazares |
| author_sort | Iván Restrepo |
| collection | DOAJ |
| description | Abstract The effect of molecular weights and hydrolysis degrees (HD) of polyvinyl alcohol (PVA) on thermal and mechanical properties and crystallinity of polylactic acid (PLA)/PVA blends was investigated. Blends were prepared by the melt blending method using PLA/PVA ratios: 80/20, 90/10 and 97/3 wt. %. A single glass transition temperatures was observed for all PLA/PVA blends, suggesting the formation of binary compatible blends at concentration range studied. Thermogravimetric analysis results showed a better thermal stability for PLA/PVA blends containing PVA of higher Mw and HD. According to mechanical properties, low quantities of PVA (3 wt. %) do not affect the tensile strength of blends (irrespective of Mw and HD). However, as the PVA content increases, tensile strength tends to lower values, especially for blends with 20 wt.% of PVA, with 98% of HD. |
| first_indexed | 2024-12-10T22:03:58Z |
| format | Article |
| id | doaj.art-2e62723e8a434373961e4798c3b8ccc3 |
| institution | Directory Open Access Journal |
| issn | 1678-5169 |
| language | English |
| last_indexed | 2024-12-10T22:03:58Z |
| publishDate | 2018-05-01 |
| publisher | Associação Brasileira de Polímeros |
| record_format | Article |
| series | Polímeros |
| spelling | doaj.art-2e62723e8a434373961e4798c3b8ccc32022-12-22T01:31:48ZengAssociação Brasileira de PolímerosPolímeros1678-51692018-05-01010.1590/0104-1428.03117S0104-14282018005002106The effect of molecular weight and hydrolysis degree of poly(vinyl alcohol)(PVA) on the thermal and mechanical properties of poly(lactic acid)/PVA blendsIván RestrepoCarlos MedinaViviana MeruaneAli Akbari-FakhrabadiPaulo FloresSaddys Rodríguez-LlamazaresAbstract The effect of molecular weights and hydrolysis degrees (HD) of polyvinyl alcohol (PVA) on thermal and mechanical properties and crystallinity of polylactic acid (PLA)/PVA blends was investigated. Blends were prepared by the melt blending method using PLA/PVA ratios: 80/20, 90/10 and 97/3 wt. %. A single glass transition temperatures was observed for all PLA/PVA blends, suggesting the formation of binary compatible blends at concentration range studied. Thermogravimetric analysis results showed a better thermal stability for PLA/PVA blends containing PVA of higher Mw and HD. According to mechanical properties, low quantities of PVA (3 wt. %) do not affect the tensile strength of blends (irrespective of Mw and HD). However, as the PVA content increases, tensile strength tends to lower values, especially for blends with 20 wt.% of PVA, with 98% of HD.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282018005002106&lng=en&tlng=enmaterial testingmelt blendingpolylactic acidpolyvinyl alcoholpolymer blend |
| spellingShingle | Iván Restrepo Carlos Medina Viviana Meruane Ali Akbari-Fakhrabadi Paulo Flores Saddys Rodríguez-Llamazares The effect of molecular weight and hydrolysis degree of poly(vinyl alcohol)(PVA) on the thermal and mechanical properties of poly(lactic acid)/PVA blends Polímeros material testing melt blending polylactic acid polyvinyl alcohol polymer blend |
| title | The effect of molecular weight and hydrolysis degree of poly(vinyl alcohol)(PVA) on the thermal and mechanical properties of poly(lactic acid)/PVA blends |
| title_full | The effect of molecular weight and hydrolysis degree of poly(vinyl alcohol)(PVA) on the thermal and mechanical properties of poly(lactic acid)/PVA blends |
| title_fullStr | The effect of molecular weight and hydrolysis degree of poly(vinyl alcohol)(PVA) on the thermal and mechanical properties of poly(lactic acid)/PVA blends |
| title_full_unstemmed | The effect of molecular weight and hydrolysis degree of poly(vinyl alcohol)(PVA) on the thermal and mechanical properties of poly(lactic acid)/PVA blends |
| title_short | The effect of molecular weight and hydrolysis degree of poly(vinyl alcohol)(PVA) on the thermal and mechanical properties of poly(lactic acid)/PVA blends |
| title_sort | effect of molecular weight and hydrolysis degree of poly vinyl alcohol pva on the thermal and mechanical properties of poly lactic acid pva blends |
| topic | material testing melt blending polylactic acid polyvinyl alcohol polymer blend |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282018005002106&lng=en&tlng=en |
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