Article
Chemistry, Physical
Joshua Moncada, Mark D. D. Dadmun
Summary: Polymeric materials, such as PET, are widely used but generate a large quantity of waste. Chemical recycling of PET is of interest, but methods for complete depolymerization are time- and energy-intensive. This study investigates the depolymerization of PET and proposes a method to capture telechelic oligomers as reactants, which can be used to produce value-added goods. The reaction conditions, such as temperature and catalyst loading, affect the product chain structure and yield. The results provide crucial insight into producing target telechelic oligomers of PET.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Composites
Bedriye Ucpinar Durmaz, Miray Gozde Atilgan, Ayse Aytac
Summary: The study evaluated the effectiveness of GO as reinforcement material and Joncryl as a compatibilizing agent for PET/PBT blends, finding that Joncryl improved mechanical properties while the addition of GO weakened interfacial adhesion.
POLYMER COMPOSITES
(2021)
Article
Nanoscience & Nanotechnology
Michael Giffin, Christopher J. G. Plummer, Holger Frauenrath
Summary: Semiaromatic polyamides were blended with amine-terminated polyethylene to form PA-PE block copolymers, which improved the ductility and toughness of polyamides and expanded their application range in advanced engineering.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biochemistry & Molecular Biology
Minghui Wu, Qian Ren, Xiuyu Zhu, Wanwan Li, Haibin Luo, Fei Wu, Long Wang, Wenge Zheng, Ping Cui, Xiaosu Yi
Summary: A reactive compatibilizer was used to modify a PLA/PBAT blend foam, resulting in PLA blend foams with improved impact strength. The interfacial adhesion and cell size were found to strongly affect the impact strength of the foams. Enhancing interfacial adhesion and reducing cell size resulted in significantly improved impact properties. This study provides a feasible and practical strategy for preparing highly toughened and fully biodegradable PLA materials.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Review
Polymer Science
Serena Coiai, Maria Laura Di Lorenzo, Patrizia Cinelli, Maria Cristina Righetti, Elisa Passaglia
Summary: Poly(lactic acid) (PLA) is a widely produced biobased, biodegradable and biocompatible polyester. Although it shares similarities with petroleum-based polymers, its high brittleness and low toughness limit its utilization, prompting the blending with other biobased and biodegradable polymers. By incorporating appropriate additives and solid nanoparticles, the toughness and ductility of PLA can be improved, enhancing its mechanical performance, thermal stability and gas/vapor barrier properties.
Article
Polymer Science
Yuanfu Tian, Yehua Yang, Jinqiang Tan, Dachuan Ding, Zhiyuan Song, Qian Tao, Xuan Zheng, Tao Hu, Xinghou Gong, Chonggang Wu
Summary: An optimally compatibilized composite of chain-extended and -carboxylated PET ionomer and HBA-HNA was successfully prepared to enhance the compatibility of PET/LCP composite and mechanically strengthen the PET matrix. The synergistic effects of ionization and HBA-HNA inclusion significantly improved the mechanical properties of the composite, with a substantial increase in Young's modulus and tensile strength compared to PET. This one-pot method of synergistic ionization/LCP inclusion shows promise for the commercial production of PET engineering resins.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Deyu Niu, Jiaxuan Li, Pengwu Xu, Tianxi Liu, Weijun Yang, Zhenyu Wang, Piming Ma
Summary: By reactive compatibilization and subsequent solid-state drawing, we successfully prepared fibrous PGA/PBAT blends with high strength, toughness, and better hydrolysis resistance. The enhanced chain entanglement and stress-induced orientation contributed to the superior properties of the blends. The drawn compatibilized PGA/PBAT had a tensile strength of 700 MPa, a tensile toughness of 385 MJ/m(3), and 20% higher tensile strength retention after hydrolysis for 5 days.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Biochemistry & Molecular Biology
Jiexiu Wen, Lixiang Yi, Juanjuan Su, Jian Han
Summary: Triglycidyl isocyanurate (TGIC) is used as a reactive compatibilizer in Poly (L-lactic acid) (PLLA)/Poly (butylene adipate-co-terephthalate) (PBAT) blends, and it shows a higher affinity and reactivity with PBAT. The mixing sequence of PLLA/PBAT/TGIC blends significantly affects the compatibility, and the optimal sequence is to blend TGIC and PBAT first, followed by PLLA. This leads to the formation of a large amount of branched copolymers at the interface, resulting in improved interfacial compatibility and enhanced mechanical properties.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Materials Science, Composites
He-Zhi He, Shi-Ming Liu, Yi-Ping Ni, Feng Xue, Bin Xue, Zhi-Wen Zhu, Zhao-Xia Huang
Summary: PET/EGMA/PBE blends with a good balance between toughness and stiffness were prepared using a novel elongational rheology extruder. The inclusion of EGMA enhanced the interfacial combination between PET and PBE, leading to improved mechanical properties.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2022)
Article
Polymer Science
Y. Y. Li, D. G. Yao, M. Q. Ge
Summary: The study developed a method for converting PET into calcium terephthalate by reactive melt processing, which involves blending PET pellets with calcium hydroxide powders and conducting simple hydrolysis in water. The effective transformation of molten PET into calcium terephthalate is attributed to factors such as strong mechanical interaction during melt mixing, thermal decomposition of PET chains, and the catalytic nature of calcium hydroxide in PET hydrolysis. The research contributes to a cost-effective route for upcycling waste PET into value-added products for demanding applications.
EXPRESS POLYMER LETTERS
(2021)
Article
Green & Sustainable Science & Technology
Yanyan Li, Hongling Yi, Mengjuan Li, Mingqiao Ge, Donggang Yao
Summary: In this study, an effective method combining hydrolysis, reactive processing, and decolorization was developed to convert colored PET fabrics into high purity TPAca. By using various characterizations, the intermediates and products were identified and quantified. It was found that different structures of disperse dyes can be simultaneously decolorized with PET degradation under the joint effects of sublimation, pyrolysis, and hydrolysis, and CaTP acts as a medium to store and protect the synthesized TPAca. Overall, the method shows high yield and purity, making it suitable for industrial recycling and upcycling of complex colored PET wastes.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Polymer Science
Aristotle J. Zervoudakis, Caitlin S. Sample, Xiayu Peng, Davis Lake, Marc A. Hillmyer, Christopher J. Ellison
Summary: Polymer blend compatibilization using hydroxy-telechelic polyethylene (HOPEOH) reactive additives was achieved in this study for PET and LLDPE blends. The HOPEOH additives underwent transesterification reactions with PET during melt mixing, forming triblock copolymers and improving blend toughness. The results demonstrated that HOPEOH compounds were effective in compatibilizing blends derived from postconsumer PET and PE.
Article
Polymer Science
Aristotle J. Zervoudakis, Caitlin S. Sample, Xiayu Peng, Davis Lake, Marc A. Hillmyer, Christopher J. Ellison
Summary: Polymer blend compatibilization using hydroxy-telechelic polyethylene (HOPEOH) reactive additives resulted in reduced dispersed phase particle sizes and increased ductility. The hydroxy ends of HOPEOH undergo transesterification reactions during melt mixing with PET to form PET-PE-PET triblock copolymers at the interface, enhancing compatibility by entangling the PE midblocks with LLDPE chains.
Article
Multidisciplinary Sciences
Coralie Jehanno, Jill W. Alty, Martijn Roosen, Steven De Meester, Andrew P. Dove, Eugene Y-X Chen, Frank A. Leibfarth, Haritz Sardon
Summary: The majority of plastic waste is not degraded, leading to permanent pollution. Chemical recycling and upcycling provide new opportunities for sustainable plastic economy.
Article
Polymer Science
Kirill A. Kirshanov, Roman V. Toms, Mikhail S. Balashov, Sergey S. Golubkov, Pavel V. Melnikov, Alexander Yu. Gervald
Summary: Polymer composites with similar properties to PET-based polyester matrices can be obtained by purifying the products of PET glycolysis. A kinetic model of PET homogeneous glycolysis was proposed and verified by experimental data. The model can be used to predict optimal conditions for PET glycolysis and obtain composite materials with desired properties.
Editorial Material
Engineering, Environmental
Barry L. L. Loeb
OZONE-SCIENCE & ENGINEERING
(2023)
Editorial Material
Cell Biology
Julia Bowsher, Elizabeth L. Jockusch, Lisa Nagy
SEMINARS IN CELL & DEVELOPMENTAL BIOLOGY
(2023)
Editorial Material
Pediatrics
C. D. Anthony Herndon, Anthony Caldamone, Yves Heloury, Rosalia Misseri, Caleb Nelson, Raimund Stein
JOURNAL OF PEDIATRIC UROLOGY
(2023)
Editorial Material
History
Fiona Paisley, Tim Rowse
AUSTRALIAN HISTORICAL STUDIES
(2023)
Editorial Material
Psychology, Clinical
Sue Kegerreis
PSYCHODYNAMIC PRACTICE
(2023)
Editorial Material
Medieval & Renaissance Studies
Richard Maber
SEVENTEENTH CENTURY
(2023)
Editorial Material
Religion
Benjamin Harrison
ECCLESIASTICAL LAW JOURNAL
(2023)
Editorial Material
Agronomy
Andreas Boerner
CEREAL RESEARCH COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Claire E. Dingwell, Marc A. Hillmyer
Summary: Highly regioregular EVOH materials synthesized using ring-opening metathesis polymerization (ROMP) have better crystal structure, higher degree of hydrogen bonding, higher glass transition temperature, lower oxygen permeability, and lower water permeability compared to regiorandom EVOH materials.
ACS APPLIED POLYMER MATERIALS
(2023)
Editorial Material
Engineering, Geological
Mike J. Harbottle
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GROUND IMPROVEMENT
(2023)
Editorial Material
Engineering, Marine
Peter Wellens
INTERNATIONAL SHIPBUILDING PROGRESS
(2023)
Editorial Material
Public, Environmental & Occupational Health
Julian Ashton
JOURNAL OF PUBLIC MENTAL HEALTH
(2023)
Editorial Material
Ethics
S. Matthew Liao
JOURNAL OF MORAL PHILOSOPHY
(2023)
Editorial Material
Anthropology
Saverio Kratli
Article
Chemistry, Physical
Brenden D. Hoehn, Elizabeth A. Kellstedt, Marc A. Hillmyer
Summary: Porous materials with nanometer-scale pores have important applications as nanoporous membranes. In this study, ABA triblock copolymers were used as precursors to produce nanoporous polymeric membranes (NPMs) in thin film form by degrading the end blocks. Polycyclooctene (PCOE) NPMs with tunable pore sizes were successfully prepared using solvent casting technique. Oxygen plasma etching was employed to improve the surface porosity and hydrophilicity of the membranes. This study provides a straightforward method to produce tough NPMs with high porosity and hydrophilic surface properties.
