Thermal and Mechanical Properties of Biodegradable Star-Shaped/Linear Polylactide Stereocomplexes
The 6-arm star-shaped poly(L-lactide) (6PLL)/linear poly(D-lactide) (1PDL) stereocomplex films were prepared by the solvent casting method. The influences of the 6PLL/1PDL blend ratios (75/25, 50/50, and 25/75 w/w) and 1PDL molecular weights (15,000, 30,000, and 60,000 g/mol) on the thermal and mech...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2015/206123 |
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| author | Onanong Cheerarot Yodthong Baimark |
| author_facet | Onanong Cheerarot Yodthong Baimark |
| author_sort | Onanong Cheerarot |
| collection | DOAJ |
| description | The 6-arm star-shaped poly(L-lactide) (6PLL)/linear poly(D-lactide) (1PDL) stereocomplex films were prepared by the solvent casting method. The influences of the 6PLL/1PDL blend ratios (75/25, 50/50, and 25/75 w/w) and 1PDL molecular weights (15,000, 30,000, and 60,000 g/mol) on the thermal and mechanical properties of the stereocomplex films were investigated. The 6PLL and 1PDLs had a single melting temperature (Tm) of homocrystallites at 174°C and 167°C, respectively. The 6PLL/1PDL blends had two Tms: a lower Tm of homocrystallites (160–173°C) and a higher Tm of stereocomplex crystallites (219–228°C). The stereocomplex crystallinity and mechanical properties of the 6PLL/1PDL blend films were higher than those of 6PLL and 1PDL and were the highest in the 50/50 (w/w) blend ratio. However, the stereocomplex crystallinity of the 50/50 (w/w) 6PLL/1PDL blend films decreased and the mechanical properties increased as the molecular weight of 1PDL increased. |
| format | Article |
| id | doaj-art-882cf742b4124069b17ed816c96a2978 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
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| series | Journal of Chemistry |
| spelling | doaj-art-882cf742b4124069b17ed816c96a29782025-02-03T01:10:10ZengWileyJournal of Chemistry2090-90632090-90712015-01-01201510.1155/2015/206123206123Thermal and Mechanical Properties of Biodegradable Star-Shaped/Linear Polylactide StereocomplexesOnanong Cheerarot0Yodthong Baimark1Biodegradable Polymers Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahasarakham University, Mahasarakham 44150, ThailandBiodegradable Polymers Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahasarakham University, Mahasarakham 44150, ThailandThe 6-arm star-shaped poly(L-lactide) (6PLL)/linear poly(D-lactide) (1PDL) stereocomplex films were prepared by the solvent casting method. The influences of the 6PLL/1PDL blend ratios (75/25, 50/50, and 25/75 w/w) and 1PDL molecular weights (15,000, 30,000, and 60,000 g/mol) on the thermal and mechanical properties of the stereocomplex films were investigated. The 6PLL and 1PDLs had a single melting temperature (Tm) of homocrystallites at 174°C and 167°C, respectively. The 6PLL/1PDL blends had two Tms: a lower Tm of homocrystallites (160–173°C) and a higher Tm of stereocomplex crystallites (219–228°C). The stereocomplex crystallinity and mechanical properties of the 6PLL/1PDL blend films were higher than those of 6PLL and 1PDL and were the highest in the 50/50 (w/w) blend ratio. However, the stereocomplex crystallinity of the 50/50 (w/w) 6PLL/1PDL blend films decreased and the mechanical properties increased as the molecular weight of 1PDL increased.http://dx.doi.org/10.1155/2015/206123 |
| spellingShingle | Onanong Cheerarot Yodthong Baimark Thermal and Mechanical Properties of Biodegradable Star-Shaped/Linear Polylactide Stereocomplexes Journal of Chemistry |
| title | Thermal and Mechanical Properties of Biodegradable Star-Shaped/Linear Polylactide Stereocomplexes |
| title_full | Thermal and Mechanical Properties of Biodegradable Star-Shaped/Linear Polylactide Stereocomplexes |
| title_fullStr | Thermal and Mechanical Properties of Biodegradable Star-Shaped/Linear Polylactide Stereocomplexes |
| title_full_unstemmed | Thermal and Mechanical Properties of Biodegradable Star-Shaped/Linear Polylactide Stereocomplexes |
| title_short | Thermal and Mechanical Properties of Biodegradable Star-Shaped/Linear Polylactide Stereocomplexes |
| title_sort | thermal and mechanical properties of biodegradable star shaped linear polylactide stereocomplexes |
| url | http://dx.doi.org/10.1155/2015/206123 |
| work_keys_str_mv | AT onanongcheerarot thermalandmechanicalpropertiesofbiodegradablestarshapedlinearpolylactidestereocomplexes AT yodthongbaimark thermalandmechanicalpropertiesofbiodegradablestarshapedlinearpolylactidestereocomplexes |