Functionalization of Styrene-Olefin Block Copolymers by Melt Radical Grafting of Glycidyl Methacrylate and Reactive Blending with PET |
| |
| Authors: | Mariano Pracella Donatella Chionna |
| |
| Institution: | 1. Institute for Composite and Biomedical Materials, CNR (National Research Council), Section of Pisa, Via Diotisalvi 2, Pisa 56126, Italy, Fax: 0039-050-511266;2. Department of Chemical Engineering, University of Pisa, Via Diotisalvi 2, Pisa 56126, Italy |
| |
| Abstract: | Blocks copolymers styrene-b-(ethylene-co-butylene)-b-styrene (SEBS) and styrene-b-(ethylene-co-propylene) (SEP, SEPSEP), with different styrene content and number of blocks in the chain, were functionalized with glycidyl methacrylate (GMA) by melt radical grafting. The influence of monomer concentration, radical initiator and copolymer structure on the grafting degree was examined. The grafted copolymers were characterised by DSC and capillary rheometry. Blends of PET with functionalized SEBS and SEPSEP showed a marked improvement of phase morphology and elongation at break when compared to blends with unfunctionalized copolymers. |
| |
| Keywords: | blend compatibilization block copolymers glycidyl methacrylate poly(ethylene terephthalate) radical grafting |
|
|
