Liquid Crystalline Copolyester Made from Recycled Polyethylene Terepthalate and p-Acetoxybenzoic Acid: Synthesis, Characterization and Blending with Recycled Polyethylene Terephthalate

Key Engineering Materials 2013
Tatjana Ivanova, Ilze Pavlovica, Jānis Zicāns, Remo Merijs-Meri, Ingars Reinholds, Valdis Kaļķis

In our work, liquid crystalline copolyester (LCC) was synthesized by high temperature polycondensation of recycled polyethylene terephthalate (rPET) and p-acetoxybenzoic acid (ABA) with rPET/ABA molar ratio equal to 40/60 mol%. The structure of synthesized LCC was confirmed by FTIR and XRD methods. Thermal properties of synthesized LCC were characterized using differential scanning calorimetry (DSC). The properties of synthesized LCC were compared to that of commercial PET 40 mol%/ ABA 60 mol% copolyester. The synthesized LCC was used as a modifier for rPET. Blends with a content of the synthesized LCC equal to 2-10 wt% were obtained by melt mixing with twin-screw extruder. Mechanical, rheological and calorimetric properties of the blends were investigated. Results showed that addition of small amount of the synthesized LCC (2- 5 wt%) enhanced processability as well as increased mechanical properties of rPET.

Atslēgas vārdi
Recycled polyethylene terepthalate, liquid crystalline copolyester,polycondinsation, composite blends, processability
DOI
10.4028/www.scientific.net/KEM.559.127

Ivanova, T., Pavlovica, I., Zicāns, J., Merijs-Meri, R., Reinholds, I., Kaļķis, V. Liquid Crystalline Copolyester Made from Recycled Polyethylene Terepthalate and p-Acetoxybenzoic Acid: Synthesis, Characterization and Blending with Recycled Polyethylene Terephthalate . Key Engineering Materials, 2013, Vol.559, 127.-132.lpp. e-ISSN 1662-9795. ISSN 1013-9826. Pieejams: doi:10.4028/www.scientific.net/KEM.559.127

Publikācijas valoda
English (en)