Novel poly(etheraroylhydrazides). An example of “conformationally disordered crystalline” polymers

✍ Scribed by G. Avitabile; G. Gentile; P. Laurienzo; M. Malinconico; E. Martuscelli; F. Riva; M. G. Volpe

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 272 KB
• Volume: 37
• Category: Article
• ISSN: 0887-6266
• DOI: 10.1002/(sici)1099-0488(19990715)37:14<1687::aid-polb13>3.0.co;2-b

✦ Synopsis

Novel aromatic poly(etheraroylhydrazides), PEHZ, incorporating a methylenic sequence (with number of OCH 2 O units m ϭ 2, 4, 6, 8, 10, 12) in the main chain, have been obtained by solution polycondensation and characterized with several techniques. In particular, Differential Scanning Calorimetry (DSC) and Wide Angle X-ray Scattering (WAXS) gave interesting results. The complex thermal behavior and the lattice parameters of these linear polyhydrazides are a function of the number of methylene units present in the flexible segment. The relationships we found suggest a model: a polymer with disorder in aliphatic segment layers while preserving chain periodicity, that is the classical model of "conformationally disordered crystalline" polymer.