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Chemical reactions during reactive blending of polyurethanes: Fiction or reality?
Author(s) -
Stutz Herbert,
Pötschke Petra,
Mierau Uta
Publication year - 1996
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.19961120122
Subject(s) - maleic anhydride , copolymer , styrene , materials science , polymer chemistry , thermoplastic , ethylene , polymer , coupling reaction , acrylic acid , maleic acid , thermoplastic elastomer , chemical engineering , polymer science , organic chemistry , chemistry , composite material , catalysis , engineering
The extent of reactions occurring during reactive blending of thermoplastic polyurethanes (PUR) with functionalized polyolefins or reactive compatibilizers has been studied using ethylene/acrylic acid and styrene/maleic anhydride copolymers. Due to interfacial segregation effects, no reaction was found with carboxylic groups and only little with anhydrides. Here 1–2% reaction products are generated after 30 min with preferentially multiple additions at the same molecules. Therefore, with incompatible polymers, reactive coupling is negligible with PUR under realistic blending conditions.