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Titolo:
Poly(ethylene-graft-ethylene oxide) (PE-PEO) and poly(ethylene-co-acrylic acid) (PEAA) as compatibilizers in blends of LDPE and polyamide-6
Autore:
Hallden, A; Ohlsson, B; Wesslen, B;
Indirizzi:
Univ Lund, Dept Polymer Sci & Engn, SE-22100 Lund, Sweden Univ Lund LundSweden SE-22100 Polymer Sci & Engn, SE-22100 Lund, Sweden Perstorp Compound, SE-28480 Perstorp, Sweden Perstorp Compound Perstorp Sweden SE-28480 nd, SE-28480 Perstorp, Sweden
Titolo Testata:
JOURNAL OF APPLIED POLYMER SCIENCE
fascicolo: 13, volume: 78, anno: 2000,
pagine: 2416 - 2424
SICI:
0021-8995(200012)78:13<2416:PO(APA>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
NYLON-6 BLENDS; MORPHOLOGY; POLYETHYLENE; CRYSTALLIZATION; POLYPROPYLENE;
Keywords:
PE/PA-6 blends; PEO-graft copolymers; compatibilization; morphology; crystallization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Wesslen, B Univ Lund, Dept Polymer Sci & Engn, POB 124, SE-22100 Lund, Sweden Univ Lund POB 124 Lund Sweden SE-22100 , SE-22100 Lund, Sweden
Citazione:
A. Hallden et al., "Poly(ethylene-graft-ethylene oxide) (PE-PEO) and poly(ethylene-co-acrylic acid) (PEAA) as compatibilizers in blends of LDPE and polyamide-6", J APPL POLY, 78(13), 2000, pp. 2416-2424

Abstract

In a blend of two immiscible polymers a controlled morphology can be obtained by adding a block or graft copolymer as compatibilizer. In the present work blends of low-density polyethylene (PE) and polyamide-6 (PA-6) were prepared by melt mixing the polymers in a co-rotating, intermeshing twin-screw extruder. Poly(ethylene-graft-polyethylene oxide) (PE-PEO), synthesized from poly(ethylene-co-acrylic acid) (PEAA) (backbone) and poly(ethylene oxide) monomethyl ether (MPEO) (grafts), was added as compatibilizer. As a comparison, the unmodified backbone polymer, PEAA, was used. The morphology of the blends was studied by scanning electron microscopy (SEM). Melting and crystallization behavior of the blends was investigated by differential scanning calorimetry (DSC) and mechanical properties by tensile testing. The compatibilizing mechanisms were different for the two copolymers, and generated two different blend morphologies. Addition of PE-PEO gave a material with small, well-dispersed PA-spheres having good adhesion to the PE matrix, whereas PEAA generated a morphology characterized by small PA-spheres agglomerated to larger structures. Both compatibilized PE/PA blends had much improved mechanical properties compared with the uncompatibilized blend, with elongation at break (epsilon (b)) increasing up to 200%. Addition of compatibilizer to the PE/PA blends stabilized the morphology towards coalescence and significantly reduced the size of the dispersed phase domains, from an average diameter of 20 mum in the unmodified PE/PA blend to approximately 1 mum in the compatibilized blends. (C) 2000 John Wiley & Sons, Inc.

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Documento generato il 28/09/20 alle ore 17:36:33