The phase structure and relaxation phenomena in blends of a poly(ether-ester) elastomer with a liquid crystalline polyester

J. Majszczyk; Z. Rosłaniec; D. Pietkiewicz; T. Pakuła

Published : 2022-09-18

Vol. 47 No. 1 (2002)

The phase structure and relaxation phenomena in blends of a poly(ether-ester) elastomer with a liquid crystalline polyester

J. Majszczyk Z. Rosłaniec D. Pietkiewicz T. Pakuła

Abstract

Poly(ether-ester) (PEE) Elitel 4450 - liquid crystalline polyester (LCP) Vectra RD 501 blends extruded (L/D = 20, D = 19mm) with a homogenizing head at 225degreesC, were studied by differential scanning calorimetry (DSC), dynamical mechanical thermal analysis (DMTA), dielectric spectroscopy, and scanning electron microscopy (SEM). The blends exhibited a multiphase microstructure. Two mechanical relaxation temperatures were found to occur, and similarly two glass transition temperatures were recorded by DSC. There is a glass transition in the PTMO soft phase (ca. - 60degreesC) and in Vectra (+ 107degreesC). For the PBT hard phase (ca. +35degreesC), T-g2, is weakly pronounced because of the high crystallinity. The blend showed only one m.p., close to the m.p. of the PEE. Three dielectric relaxation processes were found to occur in PEE and three others in Vectra. In the blends, the dielectric spectra are seen to be superimposed. These blends are immiscible in terms of thermodynamics. Vectra modified the molecular mobility of the PEE rigid segments, as evident from nonisothermal crystallization of the PBT hard phase and degree of crystallinity as also from changes of the PTMO content in the soft phase. SEM disclosed either a spherical or a fibrousstructure in the blends, depending on Vectra content.

Keywords

mieszaniny polimerów ; blokowy kopoli(etero/ester) ; poliester Vectra ciekłokrystaliczny ; wzajemna mieszalność ; struktura fazowa ; przemiany fazowe block copoly(ether-ester) ; liquid crystalline polyester ; polymer blends ; Elitel4450—Vectra RD 501 blends ; phase structure ; physical properties ; relaxation phenomena ; molecular mobility

Similar Articles

Dr Rahmah , Norsuriati, Dr Nurazzi, Khairunnisa, Pineapple leaf fibers as a reinforcement of biocomposites - an overview , Polimery: Vol. 66 No. 11-12 (2021)
E. Andrzejewska, A. Marcinkowska, M. Podgórska, I. Stępniak, M. Sądej, Photopolymerization: new investigations, new materials , Polimery: Vol. 54 No. 5 (2009)
I. Zarzyka, Oligomers with imidazolidinetrione elements of the structure obtained from parabanic acid and urea , Polimery: Vol. 59 No. 2 (2014)
J. Gołębiewski, E. Gibas, R. Malinowski, Selected biodegradable polymers - preparation, properties, applications , Polimery: Vol. 53 No. 11-12 (2008)
A. Duda, A. Kowalski, Polymerizability of aliphatic cyclic esters , Polimery: Vol. 52 No. 7-8 (2007)
J. Magryta, Effect of aerogel on the properties of acrylonitrile-butadiene rubber (NBR) vulcanizates , Polimery: Vol. 57 No. 2 (2012)
Mariola Sadej, Lukasz Gierz, Magdalena Naumowicz, Polyurethane composites with enhanced thermal conductivity containing boron nitrides , Polimery: Vol. 64 No. 9 (2019)
Dariusz Sykutera, Marek Bieliński, Improving the effectiveness of the mechanical recycling processes of thermoplastics with a porous structure , Polimery: Vol. 64 No. 11-12 (2019)
N. Panin, O. N. Babkina, N. M. Bravaya, The effect of substituents in bis(cyclopentadienyl)zirconium dichloride complexes on catalytic properties with Al(i-Bu)3/CPh3B(C6F5)4 as activator in ethylene polymerization , Polimery: Vol. 46 No. 1 (2001)
Zahraa Saadi Abdallah , Ameen Hadi Mohammed, Crosslinked poly(hydroxybutyl acrylate-co-acrylamide) based hydrogels: synthesis, characterization, and performance evaluation in heavy metal removal , Polimery: Vol. 68 No. 2 (2023)

<< < 92 93 94 95 96 97 98 99 100 101 > >>

You may also start an advanced similarity search for this article.

Details

Statistics

Authors

Download files

PDF

Zasady cytowania

Majszczyk, J., Rosłaniec, Z., Pietkiewicz, D., & Pakuła, T. (2022). The phase structure and relaxation phenomena in blends of a poly(ether-ester) elastomer with a liquid crystalline polyester. Polimery, 47(1), 34–42. Retrieved from https://polimery.ichp.vot.pl/index.php/p/article/view/1941

Citing articles via

Statistics

Total abstract views : 0

PDF Downloads : 0

J. Majszczyk polimery@ichp.pl

Affiliation
Technical University of Szczecin, Institute of Physics, Piastow 17, PL-70310 Szczecin, Poland

Z. Rosłaniec

D. Pietkiewicz

T. Pakuła