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Unsaturated Polyamides from Bio‐Based Z ‐octadec‐9‐enedioic Acid
Author(s) -
Pardal Francis,
Salhi Slim,
Rousseau Brigitte,
Tessier Martine,
Claude Sylvain,
Fradet Alain
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200700319
Subject(s) - polyamide , monomer , glass transition , polymer chemistry , polymer , molar mass , chemistry , condensation polymer , materials science , organic chemistry
A series of polyamides based on Z‐ octadec‐9‐enedioic acid, a bio‐based unsaturated monomer, and aliphatic‐, cycloaliphatic‐, or benzylic diamines were synthesized and characterized by 1 H and 13 C NMR analysis, size exclusion chromatography (SEC), DSC, and dynamic‐mechanical analysis (DMA). The high reaction temperature (250 °C) did not lead to the degradation of diacid unit double bonds and unsaturated polyamides were obtained. The aliphatic unsaturated polyamides are semi‐crystalline polymers of high molar mass, relatively flexible at room temperature. The cycloaliphatic unsaturated polyamides are semi‐crystalline or amorphous, present higher melting and glass transition temperatures and are much more rigid. The aliphatic and aliphatic–aromatic unsaturated polyamides present lower T g and T m as compared to their parent saturated polymers.