The aim of this work is to investigate whether or not both the cis and the trans isomers of either 1,4-cyclohexanedicarboxylic acid (1,4-CHDA) and 1,4-diaminocyclohexane (1,4-DACH) are participating in the formation of cryst. domains in copolyamides based thereon. Two isomeric series of partially cycloaliph. copolyamides were synthesized. In the series based on polyamide 12.6, the adipic acid residues were partially replaced by cis/trans mixts. of 1,4-CHDA, and in the series based on polyamide 4.14, the 1,4-diaminobutane residues were partially replaced by cis/trans mixts. of 1,4-DACH. By submitting these series of copolyamides to careful DSC and WAXS analyses, it could unambiguously be concluded that only the trans isomers of both 1,4-CHDA and 1,4-DACH residues are cocrystg. with the adipic acid based residues. Such evidence was not yet available in literature. [on SciFinder (R)]
|Publication status||Published - 2003|
Koning, C. E., Vanhaecht, B., Willem, R., Biesemans, M., Goderis, B., & Rimez, B. (2003). Influence of stereochemistry on cocrystallization in partially cycloaliphatic copolyamides. Polymer Preprints, 44(1), 1063-1064.