Alternating polyesteramides based on 1,4-butylene terephthalamide: 1. Synthesis of the bisterdiamide

P.J.M. Serrano, A.C.M. van Bennekom, R.J. Gaymans

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)

Abstract

The bisesterdiamide T4T dimethyl (one and a half repeat units of 1,4-butylene terephthalamide, nylon-4,T) (benzoic acid, 4,4′-[1,4-butanediylbis(iminocarbonyl)]bis-, dimethyl ester, CAS no. 1028 10-33-3) has been synthesized from an excess of dimethyl terephthalate and 1,4-butanediamine. Lithium methanolate was used as a catalyst. Different solvents have been used to optimize the yield and purity. A pure product could be obtained by recrystallization from hot NMP. D.s.c. and n.m.r. analyses were used to determine the purity of the product. The melting temperature of the T4T dimethyl (Tm=265°C) decreased with increasing loss of uniformity. The T4T dimethyl showed a transition in the crystalline structure upon heating at 160–175°C.
Original languageEnglish
Pages (from-to)5773-
JournalPolymer
Volume39
Issue number23
DOIs
Publication statusPublished - 1998

Keywords

  • Bisesterdiamides
  • 1,4-butanediamine
  • Dimethyl terephthalate

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