TY - JOUR
T1 - Synthesis and characterization of sustainable polyurethanes from renewable and recycled feedstocks
AU - Mendiburu-Valor, Eider
AU - Calvo-Correas, Tamara
AU - Martin, Loli
AU - Harismendy, Isabel
AU - Peña-Rodriguez, Cristina
AU - Eceiza, Arantxa
N1 - Publisher Copyright:
© 2023 The Authors
PY - 2023/5/10
Y1 - 2023/5/10
N2 - In this paper, sustainable thermoplastic polyurethanes (TPU) were synthesized from a recycled bis(2-hydroxyethyl) terephthalate (BHET) monomer obtained by glycolysis of marine polyethylene terephthalate (PET) litter and from a renewable castor oil-derived macrodiol. The BHET was obtained in a closed reactor at 220 °C and a short time reaction of 30 min. The TPUs with different BHET contents, ranging from 10 to 30% by weight, incorporated as chain extenders, were synthesized in bulk without catalysts. In all polyurethanes, the content of the biobased macrodiol was at least 45 wt%. TPUs with commercial BHET have also been synthesized for comparative purposes. The BHET monomer produced and the TPUs synthesized were extensively characterized. The TPUs synthesized in this work, in which at least three quarters of their components are biobased and recycled, showed an interesting combination of thermal, thermomechanical and mechanical properties.
AB - In this paper, sustainable thermoplastic polyurethanes (TPU) were synthesized from a recycled bis(2-hydroxyethyl) terephthalate (BHET) monomer obtained by glycolysis of marine polyethylene terephthalate (PET) litter and from a renewable castor oil-derived macrodiol. The BHET was obtained in a closed reactor at 220 °C and a short time reaction of 30 min. The TPUs with different BHET contents, ranging from 10 to 30% by weight, incorporated as chain extenders, were synthesized in bulk without catalysts. In all polyurethanes, the content of the biobased macrodiol was at least 45 wt%. TPUs with commercial BHET have also been synthesized for comparative purposes. The BHET monomer produced and the TPUs synthesized were extensively characterized. The TPUs synthesized in this work, in which at least three quarters of their components are biobased and recycled, showed an interesting combination of thermal, thermomechanical and mechanical properties.
KW - Glycolysis
KW - PET marine Litter
KW - Recycled BHET
KW - Renewable macrodiol
KW - Sustainable polyurethane
UR - http://www.scopus.com/inward/record.url?scp=85150766226&partnerID=8YFLogxK
U2 - 10.1016/j.jclepro.2023.136749
DO - 10.1016/j.jclepro.2023.136749
M3 - Article
AN - SCOPUS:85150766226
SN - 0959-6526
VL - 400
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
M1 - 136749
ER -
