Effect of Morphology on the Biodegradation of Thermoplastic Starch in LDPE/TPS Blends
In this study, thermoplastic starch (TPS) was mixed with low density polyethylene with different melt flow indexes in a one-step extrusion process to produce LDPE/TPS blends varied from 32% to 62% by weight of TPS. The influence of starch content and LDPE viscosity on morphology, biodegradation and...
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| Veröffentlicht in: | Polymer bulletin (Berlin, Germany) Germany), 2008-05, Vol.60 (5), p.677-688 |
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| creator | Tena-Salcido, C. S. Rodríguez-González, F. J. Méndez-Hernández, M. L. Contreras-Esquivel, J. C. |
| description | In this study, thermoplastic starch (TPS) was mixed with low density polyethylene with different melt flow indexes in a one-step extrusion process to produce LDPE/TPS blends varied from 32% to 62% by weight of TPS. The influence of starch content and LDPE viscosity on morphology, biodegradation and tensile properties of LDPE/TPS blends were evaluated. Starch continuity and biodegradability were studied by hydrolytic, enzymatic and bacterial degradation. The LDPE viscosity had a considerable effect on the morphology and the connectivity of the starch particles. Evaluation of hydrolytic extraction showed that blends having TPS content above 50 wt% possessed a full connectivity. Studies of biodegradation indicated that the bacterial attack on starch resulted in weight loss of TPS of 92%, 39% and 22%, for PE1/TPS having 62% and 32% TPS, and PE2/TPS (31% TPS), respectively. Comparatively, the weight loss was more significant at 100%, 66% and 31% by hydrolytic extraction. Differences between these two techniques were discussed in terms of the accessibility of starch domains to microorganisms. Tensile properties (ε
b
and E) decreased with increasing exposure time to activated sludge. Changes in tensile properties were highly dependent on the biodegradation rate. PE1/TPS blends having 32% starch remained ductile after 45 days of exposure to bacterial attack. |
| doi_str_mv | 10.1007/s00289-008-0903-0 |
| format | Article |
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b
and E) decreased with increasing exposure time to activated sludge. Changes in tensile properties were highly dependent on the biodegradation rate. PE1/TPS blends having 32% starch remained ductile after 45 days of exposure to bacterial attack.</description><identifier>ISSN: 0170-0839</identifier><identifier>EISSN: 1436-2449</identifier><identifier>DOI: 10.1007/s00289-008-0903-0</identifier><identifier>CODEN: POBUDR</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer-Verlag</publisher><subject>Activated sludge ; Applied sciences ; Biodegradation ; Bioplastics ; Characterization and Evaluation of Materials ; Chemical reactions and properties ; Chemistry ; Chemistry and Materials Science ; Complex Fluids and Microfluidics ; Degradation ; Exact sciences and technology ; Low density polyethylenes ; Melt flow index ; Morphology ; Natural polymers ; Organic Chemistry ; Organic polymers ; Physical Chemistry ; Physicochemistry of polymers ; Polymer blends ; Polymer Sciences ; Soft and Granular Matter ; Starch and polysaccharides ; Tensile properties ; Viscosity ; Weight loss</subject><ispartof>Polymer bulletin (Berlin, Germany), 2008-05, Vol.60 (5), p.677-688</ispartof><rights>Springer-Verlag 2008</rights><rights>2009 INIST-CNRS</rights><rights>Springer-Verlag 2008.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c346t-1b676b8b8c1bee063df466f656cfdf46737a0e3035d07318743deaf764d7cbf83</citedby><cites>FETCH-LOGICAL-c346t-1b676b8b8c1bee063df466f656cfdf46737a0e3035d07318743deaf764d7cbf83</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s00289-008-0903-0$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://www.proquest.com/docview/2917869935?pq-origsite=primo$$EHTML$$P50$$Gproquest$$H</linktohtml><link.rule.ids>314,776,780,21367,27901,27902,33721,41464,42533,43781,51294</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=20329465$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Tena-Salcido, C. S.</creatorcontrib><creatorcontrib>Rodríguez-González, F. J.</creatorcontrib><creatorcontrib>Méndez-Hernández, M. L.</creatorcontrib><creatorcontrib>Contreras-Esquivel, J. C.</creatorcontrib><title>Effect of Morphology on the Biodegradation of Thermoplastic Starch in LDPE/TPS Blends</title><title>Polymer bulletin (Berlin, Germany)</title><addtitle>Polym. Bull</addtitle><description>In this study, thermoplastic starch (TPS) was mixed with low density polyethylene with different melt flow indexes in a one-step extrusion process to produce LDPE/TPS blends varied from 32% to 62% by weight of TPS. The influence of starch content and LDPE viscosity on morphology, biodegradation and tensile properties of LDPE/TPS blends were evaluated. Starch continuity and biodegradability were studied by hydrolytic, enzymatic and bacterial degradation. The LDPE viscosity had a considerable effect on the morphology and the connectivity of the starch particles. Evaluation of hydrolytic extraction showed that blends having TPS content above 50 wt% possessed a full connectivity. Studies of biodegradation indicated that the bacterial attack on starch resulted in weight loss of TPS of 92%, 39% and 22%, for PE1/TPS having 62% and 32% TPS, and PE2/TPS (31% TPS), respectively. Comparatively, the weight loss was more significant at 100%, 66% and 31% by hydrolytic extraction. Differences between these two techniques were discussed in terms of the accessibility of starch domains to microorganisms. Tensile properties (ε
b
and E) decreased with increasing exposure time to activated sludge. Changes in tensile properties were highly dependent on the biodegradation rate. PE1/TPS blends having 32% starch remained ductile after 45 days of exposure to bacterial attack.</description><subject>Activated sludge</subject><subject>Applied sciences</subject><subject>Biodegradation</subject><subject>Bioplastics</subject><subject>Characterization and Evaluation of Materials</subject><subject>Chemical reactions and properties</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Complex Fluids and Microfluidics</subject><subject>Degradation</subject><subject>Exact sciences and technology</subject><subject>Low density polyethylenes</subject><subject>Melt flow index</subject><subject>Morphology</subject><subject>Natural polymers</subject><subject>Organic Chemistry</subject><subject>Organic polymers</subject><subject>Physical Chemistry</subject><subject>Physicochemistry of polymers</subject><subject>Polymer blends</subject><subject>Polymer Sciences</subject><subject>Soft and Granular Matter</subject><subject>Starch and polysaccharides</subject><subject>Tensile properties</subject><subject>Viscosity</subject><subject>Weight loss</subject><issn>0170-0839</issn><issn>1436-2449</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp1kMtOwzAQRS0EEqXwAewsIZah4zi1nSUt5SEVUant2nIcu0mVxsFOF_17EqWCFat53bkzOgjdE3giAHwSAGKRRgAighRoBBdoRBLKojhJ0ks0AsIhAkHTa3QTwh66mjEyQtuFtUa32Fn86XxTuMrtTtjVuC0MnpUuNzuvctWWXavTbArjD66pVGhLjdet8rrAZY2XL6vFZLNa41ll6jzcoiurqmDuznGMtq-Lzfw9Wn69fcyfl5GmCWsjkjHOMpEJTTJjgNHcJoxZNmXa9imnXIGhQKc5cEoET2hulOUsybnOrKBj9DD4Nt59H01o5d4dfd2dlHFKuGBpSqedigwq7V0I3ljZ-PKg_EkSkD09OdCTHT3Z05PQ7TyenVXQqrJe1boMv4sx0DhNWO8dD7rQjeqd8X8f_G_-AyuOfdY</recordid><startdate>20080501</startdate><enddate>20080501</enddate><creator>Tena-Salcido, C. S.</creator><creator>Rodríguez-González, F. J.</creator><creator>Méndez-Hernández, M. L.</creator><creator>Contreras-Esquivel, J. C.</creator><general>Springer-Verlag</general><general>Springer</general><general>Springer Nature B.V</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope></search><sort><creationdate>20080501</creationdate><title>Effect of Morphology on the Biodegradation of Thermoplastic Starch in LDPE/TPS Blends</title><author>Tena-Salcido, C. S. ; Rodríguez-González, F. J. ; Méndez-Hernández, M. L. ; Contreras-Esquivel, J. C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c346t-1b676b8b8c1bee063df466f656cfdf46737a0e3035d07318743deaf764d7cbf83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Activated sludge</topic><topic>Applied sciences</topic><topic>Biodegradation</topic><topic>Bioplastics</topic><topic>Characterization and Evaluation of Materials</topic><topic>Chemical reactions and properties</topic><topic>Chemistry</topic><topic>Chemistry and Materials Science</topic><topic>Complex Fluids and Microfluidics</topic><topic>Degradation</topic><topic>Exact sciences and technology</topic><topic>Low density polyethylenes</topic><topic>Melt flow index</topic><topic>Morphology</topic><topic>Natural polymers</topic><topic>Organic Chemistry</topic><topic>Organic polymers</topic><topic>Physical Chemistry</topic><topic>Physicochemistry of polymers</topic><topic>Polymer blends</topic><topic>Polymer Sciences</topic><topic>Soft and Granular Matter</topic><topic>Starch and polysaccharides</topic><topic>Tensile properties</topic><topic>Viscosity</topic><topic>Weight loss</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tena-Salcido, C. S.</creatorcontrib><creatorcontrib>Rodríguez-González, F. J.</creatorcontrib><creatorcontrib>Méndez-Hernández, M. L.</creatorcontrib><creatorcontrib>Contreras-Esquivel, J. 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Starch continuity and biodegradability were studied by hydrolytic, enzymatic and bacterial degradation. The LDPE viscosity had a considerable effect on the morphology and the connectivity of the starch particles. Evaluation of hydrolytic extraction showed that blends having TPS content above 50 wt% possessed a full connectivity. Studies of biodegradation indicated that the bacterial attack on starch resulted in weight loss of TPS of 92%, 39% and 22%, for PE1/TPS having 62% and 32% TPS, and PE2/TPS (31% TPS), respectively. Comparatively, the weight loss was more significant at 100%, 66% and 31% by hydrolytic extraction. Differences between these two techniques were discussed in terms of the accessibility of starch domains to microorganisms. Tensile properties (ε
b
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| ispartof | Polymer bulletin (Berlin, Germany), 2008-05, Vol.60 (5), p.677-688 |
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| subjects | Activated sludge Applied sciences Biodegradation Bioplastics Characterization and Evaluation of Materials Chemical reactions and properties Chemistry Chemistry and Materials Science Complex Fluids and Microfluidics Degradation Exact sciences and technology Low density polyethylenes Melt flow index Morphology Natural polymers Organic Chemistry Organic polymers Physical Chemistry Physicochemistry of polymers Polymer blends Polymer Sciences Soft and Granular Matter Starch and polysaccharides Tensile properties Viscosity Weight loss |
| title | Effect of Morphology on the Biodegradation of Thermoplastic Starch in LDPE/TPS Blends |
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