Article
Polymer Science
Nattawat Jabprakon, Phongnarin Chumsaeng, Khamphee Phomphrai
Summary: Ring-opening copolymerization (ROCOP) of cyclic anhydrides and epoxides offers a potential alternative for synthesizing tunable polyesters with wide monomer scopes. The synthesis of AB(x) poly(ester-ether) polymers with tunable ether sequences has gained significant interest. In this study, AB(x) poly(ester-ether) with tunable ether linkages (x = 2.3-5.2) was conveniently synthesized using commercially available tin(ii) 2-ethylhexanoate (SnOct(2)) as the catalyst. The high purity of AB(x) polymers up to 99% was achieved, and the presence of B-x or BxC units accelerated the degradation rates of the polymers compared to conventional alternating (AB)(n) polyesters.
Article
Chemistry, Applied
Zhitao Hu, Xiaohui Cao, Huahua Huang, Yongming Chen
Summary: The copolymerization of ε-caprolactone with a hydrophilic macrolactone via organic catalyst mediated ring-opening polymerization can significantly improve the thermal stability, hydrophilicity, and degradability of the copolymers. Increasing the hydrophilic macrolactone content in the copolymer leads to reduced crystallinity and improved hydrophilic properties, resulting in faster degradation rates. This strategy shows promise for modifying polyester materials.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Chemistry, Applied
Ziyao Gan, Yinbiao Feng, Junjiao Yang, Tianwei Tan, Jing Yang
Summary: This study investigates the copolymerization of Poly(ethylene terephthalate)-poly(ethylene oxide tere-phthalate) (PET-PEOT) with poly(lactic acid) (PLA), and the impact of two copolymerization pathways on the resulting copolymers. It was found that by copolymerizing low molecular weight PET-PEOT with PLA at gradually increasing temperatures, the resulting copolymers could retain an average PLA sequence length of up to 16. Differential scanning calorimeter (DSC) and dynamic mechanical analysis (DMA) showed that these copolymers had a random segment distribution, and the glass transition temperatures decreased with increasing PET-PEOT content. The initial decomposition temperatures of the copolymers, analyzed by thermogravimetric analysis, decreased with increasing PLA content. The mechanical properties and potential degradability of the copolymers have been significantly improved.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Biochemistry & Molecular Biology
Widyantari Rahmayanti, Selvaraj Nagarajan, Ya-Sen Sun, Eamor M. Woo
Summary: This study found that five different aryl polyesters can form ring-banded spherulites with universal characteristics during crystallization. The research explored the correlations between micro/nanocrystal assemblies, grating architectures, and structural iridescent properties. The interior lamellar assembly of arylate polyesters' banded spherulites exhibits periodic birefringence patterns similar to those found in biological structures, resulting in iridescent color.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Georgina L. Gregory, Gregory S. Sulley, Joost Kimpel, Matylda Lagodzinska, Lisa Hafele, Leticia Pena Carrodeguas, Charlotte K. Williams
Summary: This study reports well-defined reprocessable poly(ester-b-carbonate-b-ester) elastomers with impressive physical properties and degradability. The superior performance of these elastomers is attributed to the highly entangled soft segments, fully reversible strain-induced crystallization, and precisely placed Zn-II-carboxylates dynamically crosslinking the hard domains.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Biochemistry & Molecular Biology
Guoqiang Wang, Li Zhang, Xiang Chi
Summary: Due to its superior tensile strength, biodegradability, and biocompatibility, poly(lactic acid) (PLA) has become a growth-oriented biodegradable material. However, its poor ductility has limited its practical applications. To address this, ductile blends were prepared by melt-blending poly(butylene succinate-co-butylene 2,5-thiophenedicarboxylate) (PBSTF25) with PLA, which significantly improved the ductility of PLA. The addition of PBSTF25 promoted cold crystallization and stretch-induced crystallization of PLA, and the resulting blends exhibited improved ductility and processing properties. The toughening effect of PBSTF25 was found to be better than that of poly(butylene succinate).
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Polymer Science
Hideto Tsuji, Sena Nogata, Hirotada Gamo, Kazuhiro Hikima, Atsunori Matsuda, Yuki Arakawa
Summary: This study investigated enantiomeric aromatic poly(lactic acid)s and their crystallization, thermal properties, and degradation. It was found that high molecular weight poly(L-mandelic acid) and poly(d-mandelic acid) exhibited predominant stereocomplex crystallization, while low molecular weight blends showed both stereocomplex and homo-crystallization. The aromatic poly(mandelic acid) had higher glass transition temperatures and lower melting temperatures compared to previously reported poly(lactic acid)s. The thermal degradation temperatures of the blends were higher than those of enantiomeric poly(lactic acid)s and similar to enantiomeric poly(2-hydroxybutanoic acid)s. The study also compared the crystallizability of aromatic poly(mandelic acid) and poly(phenyllactic acid).
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Polymer Science
Jingwei Jiang, Zhichao Wang, Yunlong Sun, Zengxu Qian, Zengwen Cao, Zhipeng Wang, Guangyuan Zhou
Summary: This study successfully synthesized novel polymer materials with low dielectric constant, good thermal resistance, and mechanical properties, and elucidated the relationship between dielectric constant and the number of methylene groups by constructing a model. The obtained polymer material has significant application value in the field of high-frequency communications.
Article
Polymer Science
Jingjing Liu, Mingchen Jia, Yves Gnanou, Xiaoshuang Feng
Summary: This study presents the synthesis of CO2-based triblock copolymers with a central poly(ether carbonate) block surrounded by two polylactide blocks. By adjusting the CO2 pressure during copolymerization, the glass transition temperature of the central block can be fine-tuned, allowing the synthesis of poly(propylene oxide-co-propylene carbonate) with different carbonate versus ether contents. The resulting triblock copolymers exhibit improved ductility compared to the parent copolymers and outperform commercial polyolefins in terms of mechanical properties.
Article
Thermodynamics
Marek Pyda, Marcin Skotnicki, Anna Czerniecka-Kubicka, Iwona Zarzyka
Summary: In this paper, the heat capacity of the liquid state above the glass transition temperature of poly(vinyl methyl ether) (PVME) was investigated. The experimental heat capacity was linked to molecular motions and calculated as the sum of vibrational, external, and conformational contributions. The results showed good agreement between computed and experimental data in the temperature range from 250 to 360 K.
THERMOCHIMICA ACTA
(2023)
Article
Polymer Science
Danijela Kojic, Katharina Ehrmann, Raffael Wolff, Yazgan Mete, Thomas Koch, Juergen Stampfl, Stefan Baudis, Robert Liska
Summary: This study demonstrates the first stereolithographic printing of pure poly(ether-esters) without the need for radical mechanisms to accelerate curing. Spiro-orthoesters as expanding monomers were used to minimize shrinkage stress. With the combination of bifunctional spiro-orthoesters or epoxides, pure aliphatic poly(ether-ester) parts were successfully printed via Hot Lithography at elevated temperatures, achieving precision part size, high resolution, and excellent surface-finish.
Article
Multidisciplinary Sciences
Xiaohui Song, Dengwen Shi, Wenqiang Li, Huadong Qin, Xingguo Han
Summary: This study successfully interweaved scaffolds with composites using fused filament fabrication technology, achieving the goal of filling the pores and enhancing mechanical properties. The results showed that the interweaved scaffolds had good stability and biomechanical performance, and could adapt and maintain stability during the adhesion and proliferation process of bone cells, making them suitable for tissue engineering bone implants.
SCIENTIFIC REPORTS
(2022)
Article
Polymer Science
Huining Ding, Xianmin Wu, Bing Han, Ning Liu, Binyuan Liu, Il Kim
Summary: Highly regioselective ring-opening copolymerizations of 5-norbornene-2,3-dicarboxylic anhydride (NA) and epoxide monomers have been achieved using Cr-III catalysts and specific ligands, allowing for the control of cis/trans regioselectivity in the resulting polyesters by adjusting feed ratio and monomer structure. The resulting polyesters from the copolymerization of NA and epichlorohydrin provide a robust platform for post-modification, with the ring-strained C=C double bonds in the norbornene units facilitating further functionalization through azide-alkene 1,3-dipolar cycloaddition reactions based on desired targets.
Article
Polymer Science
Yan-Chen Wu, Hua-Zhong Fan, Wei Zhang, Meng-Yuan Wang, Zhongzheng Cai, Jian-Bo Zhu
Summary: Biobased materials are attractive alternatives to petroleum-based plastics due to their renewable nature and degradability. In this study, we synthesized a class of seven-membered ring carbonates containing biobased Diels-Alder adduct moieties. These materials exhibited excellent reactivity and could be used to produce functionalizable polymers with a range of thermal and mechanical properties. This research provides a novel design strategy for the synthesis of biobased materials with tunable properties.
Article
Thermodynamics
Ignazio Blanco, Gianluca Cicala, Filippo Samperi, Andrea Scamporrino, Claudio Tosto
Summary: A series of poly(ether sulfone) random copolymers with different loading of diphenolic acid (DPA) units were synthesized and their thermal behavior was comprehensively studied. The copolymers were synthesized from various amounts of 4,4'-dihydroxydiphenylsulfone, DPA, and 4,4'-dichlorodiphenyl sulfone. The degradation activation energy (E-a) was determined and compared with previous studies. The thermal stability evaluation showed good performance, but caution is needed regarding the percentage of pendant carboxylic acid groups, as deterioration of physical properties was observed at 30% content.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Polymer Science
Swapna Valiya Parambath, Deepalekshmi Ponnamma, Kishor Kumar Sadasivuni, Sabu Thomas, Ranimol Stephen
JOURNAL OF APPLIED POLYMER SCIENCE
(2017)
Article
Polymer Science
Reinoud J. Gaymans, Andries W. van Swaaij
JOURNAL OF APPLIED POLYMER SCIENCE
(2011)
Article
Polymer Science
A. C. Ijzer, A. Arun, S. R. Reijerkerk, K. Nijmeijer, M. Wessling, R. J. Gaymans
JOURNAL OF APPLIED POLYMER SCIENCE
(2010)
Article
Polymer Science
G. J. E. Biemond, K. Brasspenning, R. J. Gaymans
JOURNAL OF APPLIED POLYMER SCIENCE
(2012)
Article
Polymer Science
Valiya Parambath Swapna, Thomasukutty Jose, Soney C. George, Sabu Thomas, Ranimol Stephen
JOURNAL OF APPLIED POLYMER SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
G. J. E. Biemond, Reinoud J. Gaymans
JOURNAL OF MATERIALS SCIENCE
(2010)
Article
Engineering, Chemical
Sander R. Reijerkerk, Araichimani Arun, Reinoud J. Gaymans, Kitty Nijmeijer, Matthias Wessling
JOURNAL OF MEMBRANE SCIENCE
(2010)
Article
Materials Science, Composites
V. P. Swapna, Ranimol Stephen, T. Greeshma, C. Sharan Dev, M. S. Sreekala
POLYMER COMPOSITES
(2016)
Review
Polymer Science
Reinoud J. Gaymans
PROGRESS IN POLYMER SCIENCE
(2011)
Article
Materials Science, Multidisciplinary
Valiya Parambath Swapna, Selvin P. Thomas, Thomasukutty Jose, Grace Moni, Soney C. George, Sabu Thomas, Ranimol Stephen
JOURNAL OF MATERIALS SCIENCE
(2019)
Article
Polymer Science
Valiya Parambath Swapna, Padinharu Madathil Gopalakrishnan Nambissan, Selvin P. Thomas, Abitha Vayyaprontavida Kaliyathan, Thomasukutty Jose, Soney C. George, Sabu Thomas, Ranimol Stephen
POLYMER INTERNATIONAL
(2019)
Article
Materials Science, Multidisciplinary
V. S. Abhisha, Aneeta Augustine, Jesna Joseph, Selvin P. Thomas, Ranimol Stephen
JOURNAL OF ELASTOMERS AND PLASTICS
(2020)
Article
Polymer Science
Valiya Parambath Swapna, Abitha Vayyaprontavida Kaliyathan, Vakkoottil Sivadasan Abhisha, Hanna Joseph Maria, Padinharu Madathil Gopalakrishnan Nambissan, Sabu Thomas, Ranimol Stephen
Summary: This study investigates the impact of various organically functionalized polyhedral oligomeric silsesquioxane (POSS) particles on the gas transport properties in poly(vinyl alcohol) (PVA) membranes. The results show that PEG-POSS significantly enhances the CO(2) separation performance of PVA membrane, while Octa-TMA-POSS and m-POSS reduce the permeability of O(2) and N(2) in comparison to pure PVA.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Proceedings Paper
Polymer Science
V. P. Swapna, E. P. Saranya, A. B. Nithya, Sabu Thomas, Ranimol Stephen
MACROMOLECULAR SYMPOSIA
(2016)
Article
Polymer Science
V. P. Swapna, Selvin P. Thomas, K. Suresh, V Saranya, M. P. Rahana, Ranimol Stephen
INTERNATIONAL JOURNAL OF PLASTICS TECHNOLOGY
(2015)
