Premium
Oxazoline functionalization of polyethylenes and their blends with polyamides and polyesters
Author(s) -
La Mantia Francesco P.,
Scaffaro Roberto,
Colletti Claudio,
Dimitrova Todorka,
Magagnini Pierluigi,
Paci Massimo,
Filippi Sara
Publication year - 2001
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 - 10.1002/1521-3900(200112)176:1<265::aid-masy265>3.0.co;2-i
Subject(s) - compatibilization , materials science , surface modification , linear low density polyethylene , polyamide , high density polyethylene , polyethylene , polyester , polymer blend , polyethylene terephthalate , polymer chemistry , composite material , polymer , chemical engineering , copolymer , engineering
The compatibilization of blends of polyamide‐6 (PA6) with linear low density polyethylene (LLDPE) and of poly(ethylene terephthalate) (PET) with high density polyethylene (HDPE), by functionalization of the polyethylenes with oxazoline groups was investigated. Chemical modification of LLDPE and HDPE was carried out by melt free radical grafting with ricinoloxazoline maleinate. Blends preparation was made either with a two‐steps procedure comprising functionalization and blending, and in a single step in which the chemical modification of polyethylene with the oxazoline monomer was realized in situ , during blending. The characterization of the products was carried out by FTIR spectroscopy and scanning electron microscopy (SEM). The rheological and mechanical properties of the blends were also investigated. The results show that functionalization of the polyethylenes can be achieved by melt blending with ricinoloxazoline maleinate even in the absence of free radical initiators. The compatibilization of the blends enhances the dispersion of the minor phase significantly, increases the melt viscosity, and improves the mechanical properties. The one‐step preparation of the compatibilized blends was also found to be effective, and is thought to be even more promising in view of commercial application.