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Functionalization of Styrene‐Olefin Block Copolymers by Melt Radical Grafting of Glycidyl Methacrylate and Reactive Blending with PET
Author(s) -
Pracella Mariano,
Chionna Donatella
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200451418
Subject(s) - copolymer , glycidyl methacrylate , styrene , materials science , polymer chemistry , grafting , radical initiator , monomer , olefin fiber , polybutadiene , radical polymerization , methacrylate , polymer , composite material
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.