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Dependence of the interfacial reaction and morphology development on the functionality of the reactive precursors in reactive blending
Author(s) -
Yin Z.,
Koulic C.,
Pagnoulle C.,
Jérôme R.
Publication year - 2003
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.200350817
Subject(s) - copolymer , polymer chemistry , materials science , anthracene , phthalic anhydride , amine gas treating , polymerization , reactive extrusion , atom transfer radical polymerization , phase (matter) , morphology (biology) , chemical engineering , chemistry , photochemistry , polymer , organic chemistry , composite material , catalysis , engineering , biology , genetics
PMMA containing 50 wt% of anthracene‐labeled PMMA chains end‐capped by a phthalic anhydride group (anth‐PMMA‐anh) has been melt blended at 180°C with PS containing 33 wt% of chains end‐capped by an aliphatic primary amine (PS‐NH 2 ) and PS bearing 3.5 pendant amine groups (as an average) along the chains (PS‐co‐PSNH 2 ), respectively. The reactive chains have been synthesized by atom transfer radical polymerization. Conversion of anth‐PMMA‐anh into PS‐b‐PMMA and PS‐g‐PMMA copolymers has been monitored by SEC with a UV detector. The interfacial reaction mainly occurs in the initial melting and softening stage (<1.0 min.), although at a rate which strongly depends on the number of reactive groups attached to PS chains, the higher conversion being observed for the PS‐co‐PSNH 2 containing blends. The phase morphology depends on the architecture of the in‐situ formed copolymer. Indeed, a coarser phase dispersion is observed in case of the graft copolymer compared to the diblock.