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Reactive compatibilization of poly(styrene‐Co‐maleic anhydride)/poly(phenylene oxide) blends
Author(s) -
Koning Cor,
Bruls Willie,
Buijsch Frans Op Den,
Vondervoort Lizette V. D.
Publication year - 1996
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.19961120124
Subject(s) - materials science , maleic anhydride , compatibilization , copolymer , polystyrene , elongation , styrene , polymer chemistry , amine gas treating , composite material , phase (matter) , polymer blend , ultimate tensile strength , polymer , organic chemistry , chemistry
Primary amine terminated polystyrene (PS‐NH 2 ), with Mn=12,000 g/mol and Mw=23,000 g/mol, was applied as a reactive compatibilizer for poly(styrene‐co‐maleic anhydride)/poly(phenylene oxide) (SMA/PPO) blends, in which both an impact modifier for the continuous SMA phase, viz. ABS, and the dispersed PPO phase, viz. SEBS, was incorporated. During melt blending, SMA‐g‐PS copolymers are generated at the interface between the SMA/ABS and the PPO/SEBS phases. The addition of 10 wt % of the reactive PS‐NH 2 compatibilizer to a SMA/ABS/PPO/SEBS 30/30/30/10 blend results in a more significant refinement of the dispersed PPO/SEBS particles than 10 wt % of a commercially available, bulky PS‐graft‐PMMA copolymer with Mn=45,300 and Mw=293,400 g/mol. In addition, PS‐NH 2 gives a more pronounced enhancement of the yield stress, the stress at break and the notched Izod Impact than the PS‐g‐PMMA. On the other hand, the elongation at break is higher in the case of the non‐reactive PS‐g‐PMMA. It was demonstrated that surface imperfections, probably introduced by an observed strongly elastic character due to partial crosslinking of the SMA/ABS phase by difunctional H 2 N‐PS‐NH 2 , are responsible for the lower elongation at break for the PS‐NH 2 based blends.