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On the use of extruders as chemical reactors
Author(s) -
Natov Milcho,
Mitova Violeta,
Vassileva Stefanka
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.13702
Subject(s) - polyamide , nitrile rubber , extrusion , materials science , formic acid , plastics extrusion , elastomer , polymer , nitrile , thermoplastic elastomer , acrylonitrile , copolymer , composite material , polymer chemistry , solubility , reactive extrusion , polyester , chemical engineering , chemical modification , natural rubber , chemistry , organic chemistry , engineering
Composites of polyamide‐6 (PA‐6) and poly(butadiene acrylonitrile) (PBAN), varying in the quantity of the elastomer and the content of its nitrile groups, were examined during extrusion in a 45‐mm extruder at 225 ± 2°C and with a shear rate over 450 s −1 . It was established that these two incompatible polymers can be mixed and the blends display solubility in formic acid. This fact is explained by chemical transformation of the nitrile groups followed by chemical interaction between the polyamide and elastomer components. As a result, graft copolymers were most probably formed. The reaction proceeds easily if the PA‐6 contains water. The extrusion leads to improved compatibility of the polymers and enhanced impact strength of the extrudates. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 871–877, 2004