Related Experiment Video
Updated: Sep 29, 2025

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Published on: February 7, 2017
Direct Synthesis of Thermally Stable Semiaromatic Polyamides by Bulk Polymerization Using Aromatic Diamines and
Taiki Endo1, Tomoya Higashihara1
1Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan.
Abstract:
Semiaromatic polyamides were directly synthesized by bulk polycondensation of aliphatic dicarboxylic acids (with 5, 6, 7, and 10 carbon numbers) and aromatic diamines (4,4'-oxydianiline and 4,4'-diaminodiphenylmethane) under natural pressure. In addition, copolyamides were successfully obtained by the copolymerization of aliphatic dicarboxylic acids, aromatic diamines, and biobased amino acid, 4-aminohydrocinnamic acid. The obtained polyamides had relatively high inherent viscosity values of 0.35-0.76 dL/g. The obtained polyamides exhibited good thermal stability with T d5% in the range of 316-416 °C, even when incorporated with aliphatic methylene units. In particular, some copolyamides (2AO, 2PO, and 2GM) had high T g values of 150, 158, and 156 °C and relatively low T m values of 277, 288, and 234 °C, respectively, which may be preferable thermal properties for melt-drawing processes.
Related Concept Videos
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Step-Growth Polymerization: Overview
Many natural and synthetic polymers are produced by...
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
Free-Radical Chain Reaction and Polymerization of Alkenes
Anionic Chain-Growth Polymerization: Mechanism
Ziegler–Natta Chain-Growth Polymerization: Overview

