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Long‐Aliphatic‐Segment Polyamides: Salt Preparation and Subsequent Anhydrous Polymerization
Author(s) -
Boussia Anastasia C.,
Vouyiouka Stamati.,
Porfiris Athanasios D.,
Papaspyrides Constantine D.
Publication year - 2010
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201000057
Subject(s) - hexamethylenediamine , anhydrous , polyamide , monomer , materials science , polymerization , polymer chemistry , salt (chemistry) , methylene , solid state , prepolymer , polymer , organic chemistry , chemical engineering , chemistry , composite material , polyurethane , engineering
Long‐aliphatic‐segment polyamides were prepared based on hexamethylenediamine and α, ω ‐(CH 2 ) x biosynthetic diacids ( x = 10, 11, 12). The pertinent monomers (salts) were isolated as solids, thoroughly characterized for the first time, and then submitted to an anhydrous melt prepolymerization technique. The obtained prepolymers exhibited $\overline {M} _{{\rm n}} $ in the range of 5 100–11 800 g · mol −1 , and the molecular weight was further increased by up to 55% through solid‐state finishing. The suggested overall polyamidation cycle was conducted at short melt‐reaction times, so as to avoid any thermal degradation, and was proved efficient, indicating similar reactants polymerizability independently of the methylene content.