Synthesis and characterization of polyamides obtained from tartaric acid and L-lysine

被引：0

作者：

Majó, M. Antonia ^{[1
]}

Alla, Abdelilah ^{[1
]}

Bou, Jordi J. ^{[1
]}

Herranz, Concepción ^{[1
]}

Muñoz-Guerra, Sebastián ^{[1
]}

机构：

[1] Dept. d'Enginyeria Química, Univ. Politèc. de Catalunya, ETSEIB, Diagonal 647, 08028 Barcelona, Spain

来源：

European Polymer Journal | 2004年 / 40卷 / 12期

关键词：

Crystallization - Differential scanning calorimetry - Glass transition - Monomers - Organic acids - Synthesis (chemical) - X ray diffraction analysis;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Two sets of AA &middot BB-type polyamides (PLyTA) were synthesized from natural compounds L-lysine and D- or L-tartaric acid via the active ester polycondensation method. The carboxyl and hydroxyl side groups were orthogonally protected as methyl ester and methyl ether, respectively. Direct reaction of methyl L-lysinate dihydrochloride with bis(pentachlorophenyl) di-O-methyl tartaric acid led to the aregic polyamide ar-PLyTA, whereas isoregic (ir-PLyTA) and syndioregic (sr-PLyTA) polyamides were obtained by polycondensation of specifically designed amide-aminoacid and amide-diamine monomeric precursors, respectively. These polyamides have intrinsic viscosities in the 0.50-0.76dl g-1 range, display optical activity, and are readily soluble in chloroform. They start to decompose well above 200°C and display glass-transition temperatures at 100-105°C. DSC and X-ray diffraction results indicated that these polyamides are not crystalline but they seem to adopt a partially ordered phase. No differences in properties other than optical rotation were observed between PLyTA made of D- and L-tartaric acid. © 2004 Elsevier Ltd. All rights reserved.

引用

页码：2699 / 2708

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