FTIR study of the poly(ethylene oxide)-resorcinol molecular complex

M. Dosiere

doi:10.1117/12.56497

1 March 1992 FTIR study of the poly(ethylene oxide)-resorcinol molecular complex

M. Dosiere

Proceedings Volume 1575, 8th Intl Conf on Fourier Transform Spectroscopy; (1992) https://doi.org/10.1117/12.56497
Event: Eighth International Conference on Fourier Transform Spectroscopy, 1991, Lubeck-Travemunde, Germany

Abstract

The occurrence of a PEO-resorcinol molecular complex has been reported by Myasnikova et (1) and Cheng et j(2) The phase diagram shows that a bell-shaped region, centred about a 2:1 stoichiometry (i.e. two PEO monomer units for one resorcinol molecule) which separates two eutectic points°. From an X-ray investigation, Myasnikova et al. proposed a monoclinic unit cell: a=1.605 nm, b=1.425 nm, c=0.984 nm, = 1 12° and the space group, P2 1/a• This unit cell contains four chains, where four PEO monomer units are associated with two resorcinol molecu1es°. Recently, it has been shown by differential scanning calorimetry that the poly(ethylene oxide)-resorcinol molecular complex crystallizes into two allotropic forms, denoted as a and B forms, respectively(3). The cx form of the molecular complex crystallizes as unbanded spherulites. The reflections of the wide angle X-ray patterns from stretched film and spherulite of the a form are indexed on the basis of an orthorhombic unit cell, (a= 1.050 nm; b= 1.0132 nm; c= 0.9776 nm), with Pfl1 space group. This unit cell widely differs from the monoclinic unit cell previously reported by Myasnikova et This paper is devoted to the FTIR study of both allotropic forms of the PEO-resorcinol molecular complex.

Citation Download Citation

M. Dosiere "FTIR study of the poly(ethylene oxide)-resorcinol molecular complex", Proc. SPIE 1575, 8th Intl Conf on Fourier Transform Spectroscopy, (1 March 1992); https://doi.org/10.1117/12.56497

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