Synthesis of AB and ABA block copolymers as compatibilizers in nylon 6 polycarbonate blends (Articolo in rivista)

Type
Label
  • Synthesis of AB and ABA block copolymers as compatibilizers in nylon 6 polycarbonate blends (Articolo in rivista) (literal)
Anno
  • 1996-01-01T00:00:00+01:00 (literal)
Alternative label
  • GlORClO MONTAUDO, CONCETTO PUGLISI, FILIPPO SAMPERI, and FRANCESCO PAOLO LAMANTIA (1996)
    Synthesis of AB and ABA block copolymers as compatibilizers in nylon 6 polycarbonate blends
    in Journal of polymer science. Part A, Polymer chemistry
    (literal)
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  • GlORClO MONTAUDO, CONCETTO PUGLISI, FILIPPO SAMPERI, and FRANCESCO PAOLO LAMANTIA (literal)
Pagina inizio
  • 1283 (literal)
Pagina fine
  • 1290 (literal)
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  • 34 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
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  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Università Catania; CNR;Università Palermo (literal)
Titolo
  • Synthesis of AB and ABA block copolymers as compatibilizers in nylon 6 polycarbonate blends (literal)
Abstract
  • Nylon 6 (Ny6) and Bisphenol A polycarbonate (PC) are immiscible and form biphasic blends. To improve the compatibility of Ny6 and PC several ABA and AB Ny6/PC block copolymers were synthesized, and their compatibilizing behavior on the blends were tested. Block copolymers were prepared by reacting monoamino- or diamino-terminated Ny6 homopolymers with high molecular weight PC at 130°C in anhydrous DMSO. The reaction of diamino- and monoamino-terminated Ny6 with polycarbonate produces block copolymers of the type PC-Ny6-PC (ABA) and PC-Ny6 (AB), respectively, plus a certain amount of unconverted PC degradated to lower molecular weights. To separate the block copolymer from the unconverted PC, a selective fractionation with tetrahydrofuran (THF) and trifluoroethanol (TFE) was carried out. Three different fractions were obtained THF-soluble fraction, TFE-soluble fraction, and the TFE-insoluble fraction. The scanning electron microscopy (SEM) analysis of a 75/25 (wt/wt) Ny6/PC blend added with 2% of ABA or AB block copolymers, showed the presence of smaller PC particles more adherent to the polyamide matrix, with respect to the same blend nonadded, which is clearly biphasic. The size of the PC particles decreases from ABA to AB compatibilized blends and the adhesion with the matrix is increases in the same way. (literal)
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