Synthesis and characterization of a novel biodegradable polylactide.
A novel one-pot chemical crosslinking methodology was developed for polylactide. This involves transesterification and nucleophilic acylation reactions. Three-arm and four-arm star-shaped poly(DL-Lactide) (PLA) oligomers were successfully synthesized using glycerol and pentaerythritol initiator with...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2009
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| Online Access: | http://hdl.handle.net/10356/16604 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | A novel one-pot chemical crosslinking methodology was developed for polylactide. This involves transesterification and nucleophilic acylation reactions. Three-arm and four-arm star-shaped poly(DL-Lactide) (PLA) oligomers were successfully synthesized using glycerol and pentaerythritol initiator with 4-dimethylaminopyridine (DMAP) organocatalysts by ring-opening polymerization (ROP) in bulk. A series of crosslinked PLA samples were prepared using different reaction conditions and purification techniques. Tensile test demonstrated improved mechanical properties in the synthesized polymers. Crosslinking with 1,3,5-benzenetricarbonyl trichloride resulted in networks polymers with higher tensile strength than non-crosslinked star-shaped homopolymers. |
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