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Novel poly(etheraroyl-co-terephthal) hydrazides with liquid crystalline behaviour

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Abstract

Novel poly(etheraroyl-co-terephthal)hydrazides with liquid crystalline (LC) behaviour, synthesized by solution polycondensation followed by non-solvent coagulation in water, have been characterized by means of Fourier Transform infrared (FT-i.r.), differential scanning calorimetry (DSC) and wide angle X-ray scattering (WAXS) techniques. DSC thermograms and WAXS intensity profiles of “as polymerized” and coagulated homo- and copolymers are strongly dependent upon the molecular structure and constitution of the polymers: the poly(etheraroyl-hydrazide) homopolymer shows an LC behaviour and such a characteristic is maintained in copolymers with low content of terephthaloyldichloride comonomer, while a further increase in comonomer content attenuates this LC attitude. Annealing treatments on “as polymerized” and coagulated copolymers are able to transform the LC phase “metastable at room temperature” into crystalline and/or amorphous phases.

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  1. Instituto di Ricerca e Tecnologia delle Materie Plastiche, C.N.R., Via Toiano, 6-80072, Arco Felice, Naples, Italy

    N. Lanzetta, P. Laurienzo, M. Malinconico, E. Martuscelli, F. Riva & M. G. Volpe

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  1. N. Lanzetta
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  2. P. Laurienzo
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  3. M. Malinconico
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  4. E. Martuscelli
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  5. F. Riva
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  6. M. G. Volpe
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Lanzetta, N., Laurienzo, P., Malinconico, M. et al. Novel poly(etheraroyl-co-terephthal) hydrazides with liquid crystalline behaviour. JOURNAL OF MATERIALS SCIENCE 31, 5147–5151 (1996). https://doi.org/10.1007/BF00355917

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  • DOI: https://doi.org/10.1007/BF00355917

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