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Synthesis, characterization and properties of a soluble polymer with a poly(phenylenevinylene) structure

✍ Scribed by Francesco Babudri; Stefania R. Cicco; Gianluca M. Farinola; Francesco Naso; Alberto Bolognesi; William Porzio

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
400 KB
Volume
17
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Soluble poly(2,5‐dialkoxy‐1,4‐phenylenevinylene) has been prepared via Stille coupling reaction between 2,5‐dialkoxy‐1,4‐diiodobenzene and E‐1,2‐bis(tributylstannyl)‐ethene in the presence of palladium complexes. Characterization of this material by means of ^1^H and ^13^C nuclear magnetic resonance (NMR), ultraviolet/visible (UV/VIS) and infrared (IR) spectra is described. Molecular weights, determined by means of gelpermeation chromatography (GPC) analysis and referred to standard polystyrene, were in the range number‐average molecular weights M~n~ = 2061–2544 and weight‐average molecular weights M~w~ = 3347–3878. X‐ray diffraction (XRD) analysis of the polymer showed semicrystalline structure. T~g~ = 57°C, transition to a stable smectic mesophase at 115°C and clearing point at 210°C were revealed by differential scanning calorimetry analysis, optical microscopy observation and XRD of the annealed polymer.

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