Synthesis of New Siloxane‐Containing Polyamide Based on Limonene and Comparison of Their Properties with Non‐Siloxane Analog

Abstract

For the first time, diacid derivative of limonene was obtained by thiol-ene reaction with mercaptoacetic acid and it was further used as a monomer for the synthesis of polyamides. Commercially available hexamethylenediamine and its siloxane analogue, bis(aminopropyl) tetramethyl disiloxane, were used as diamines monomers. It was shown that the introduction of a siloxane unit into the structure of a polyamide chain increases the molecular weight and thermal stability of the polymer (more than 300°C), and also affects its phase behavior at room temperature.

The Use of the Thiol-Ene Addition Click Reaction in the Chemistry of Organosilicon Compounds: An Alternative or a Supplement to the Classical Hydrosilylation?

“…It is possible to perform the first Hs reaction to obtain AA type monomers, and then perform their polyaddition with dithiols by the second Ht at the final stage [ 127 ]. Another approach was also shown: based on limonene, a dicarboxylic derivative is first obtained by the Ht reaction and then used in a polycondensation reaction with the corresponding diamine, which leads to the formation of polyamides [ 128 ].…”