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|Title:||Synthesis and characterization of a novel biodegradable polylactide.||Authors:||Cheong, Qi Li.||Keywords:||DRNTU::Engineering::Chemical engineering::Polymers and polymer manufacture||Issue Date:||2009||Abstract:||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.||URI:||http://hdl.handle.net/10356/16604||Rights:||Nanyang Technological University||Fulltext Permission:||restricted||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SCBE Student Reports (FYP/IA/PA/PI)|
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