Article
Chemistry, Physical
Chunyang Bao, Xuhao Zhang, Pengdong Yu, Qingzhong Li, Yusheng Qin, Zhirong Xin
Summary: This study successfully synthesized degradable polyurethane thermosets with high mechanical strength and toughness, with PTMEG-HDI-BA(1.5) exhibiting optimal performance. The toughness of poly(boron-urethanes) even surpasses that of spider dragline silk. The labile nature of boron-urethanes enables rapid degradation of the materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Polymer Science
Oguzhan Oguz, Nicolas Candau, Gregory Stoclet, Eren Simsek, Cagla Kosak Soz, Emel Yilgor, Iskender Yilgor, Yusuf Z. Menceloglu
Summary: In this study, it was demonstrated that geometric confinement of the basic building blocks in sol-cast poly(urethane-urea) copolymer films can control stiffness, strength, extensibility, and toughness. Adjusting soft segment molecular weight and drying temperature can tune the severity of geometric confinement, allowing for the production of materials with different properties.
Article
Polymer Science
Yulong Wang, Yaqiong Li, Maoyong He, Jingjing Bai, Bingxiao Liu, Zhenzhong Li
Summary: In this study, four aliphatic chain extenders were used to synthesize polyurethanes and poly(urethane-urea)s, showing that the microphase structure significantly affects the material performance. The optimal sample exhibited excellent mechanical properties and self-healing performance simultaneously, providing valuable insights for developing self-healing polyurethane materials in the future.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Physical
Kamila Mizera, Kamila Salasinska, Joanna Ryszkowska, Maria Kuranska, Rafal Kozera
Summary: This study aimed to investigate the impact of biobased polyols on the flammability of new bioelastomers. Through various experimental methods, it was found that these polyols can effectively reduce burning and smoke emissions, while also increasing the thermal stability of the elastomers.
Article
Polymer Science
Xiangqian Fan, Xianming Zhai, Lei Liu, Jing Zhang, Lin Li, Jiarong Wang
Summary: This article synthesizes a crosslinked waterborne poly(urethane-urea) (WPUU) and produces waterborne polyacrylate-poly(urethane-urea) (WPUUA) hybrid emulsions through emulsion polymerization. WPUUA films have improved film-forming ability and mechanical properties compared to waterborne polyacrylate (WPA) films. The surface roughness of WPUUA films can also be adjusted by modifying the molar ratio of the raw materials.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Rui Guo, Qiang Zhang, Youshen Wu, Hongbing Chen, Yanghe Liu, Jingjing Wang, Xianglong Duan, Quan Chen, Zhishen Ge, Yanfeng Zhang
Summary: This study presents a polyurethane elastomer with unprecedented mechanical properties for in vivo application as hernia patches. The elastomer, obtained by solvent-free reaction, exhibits extremely high strength and toughness. Abundant and hierarchical hydrogen-bonding interactions hinder crystallization and promote the formation of uniformly distributed hard phase microdomains, resulting in high fracture strength, true stress, elongation-at-break, and fracture energy. 3D printed hernia patches made from this elastomer show outstanding mechanical properties, biocompatibility, and biodegradability. These robust and biodegradable elastomers have great potential for in vivo applications.
ADVANCED MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Kiran R. Adhikari, Inessa Stanishevskaya, Pablo C. Caracciolo, Gustavo A. Abraham, Vinoy Thomas
Summary: In this study, electrospun scaffolds based on a blend of PHH and PDO were characterized, showing high porosity and nanofiber structure. The mechanical properties of the blended scaffold, including elastic modulus, tensile strength, and maximum elongation, were comparable to materials currently used for soft tissue applications. This demonstrates the potential of electrospun PHH/PDO blend for cardiac patches or vascular graft applications mimicking native tissue.
Article
Polymer Science
Hui Wang, Junhuai Xu, Dongming Xing, Xiaosheng Du, Haibo Wang, Zongliang Du, Xu Cheng
Summary: A thermal-triggered self-healing polyurethane composite elastomer was fabricated using crosslinking isocyanate terminated polyurethane with amidoxime-modified silica particles. The elastomer exhibited high tensile strength, good elongation at break, excellent toughness, outstanding fracture energy, and the ability to regain its original mechanical performance and integrity after damage.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Zhen Li, Shuxiang Mei, Lu Luo, Siyuan Li, Xiaoyin Chen, Yuancheng Zhang, Wei Zhao, Xiaomeng Zhang, Ge Shi, Yanjie He, Zhe Cui, Peng Fu, Xinchang Pang, Minying Liu
Summary: This study investigates multiple and two-way reversible shape memory polymers (M/2W-SMPs) and presents a new material with quadruple shape memory effect. The material exhibits excellent performance and has potential applications in high-temperature sensors, actuators, and aerospace equipment.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Polymer Science
Liraz Avraham, Rajashekharayya A. Sanguramath, Orit Cohen, Luba Perry, Shulamit Levenberg, Michael S. Silverstein
Summary: This study successfully synthesized macroporous polymer monoliths based on four different polysaccharides using a template synthesis method in oil-in-water high internal phase emulsions. The nature of the polysaccharide and the polymerization catalyst significantly affected the porous structure. Cells were able to adhere to the walls and penetrate into the porous structures in amine-catalyzed monoliths.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Guoxian Zhang, Chunmei Li, JiaoJun Tan, Mingqi Wang, Zongxu Liu, Yafeng Ren, Ying Xue, Qiuyu Zhang
Summary: In this study, a simple and feasible method for the modification of poly(urethane-urea) (PUU) was proposed. Two different dynamic cross-linking bonds (disulfide linkages and Zn2+/imidazole coordination) were incorporated into the side chain of PUU, resulting in double cross-linking elastomers (PUU-I/Zn-S) with excellent mechanical and healing properties. The PUU-I/Zn-S elastomer exhibited high tensile stress, elongation at break, toughness, and tearing resistance, and could restore its mechanical robustness after self-healing at room temperature or higher temperatures. Furthermore, strain sensors based on PUU-I/Zn-S showed remarkable sensing capability to diverse human body motions.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Applied
Jessica D. O. Rodrigues, Carlos K. Z. Andrade, Rafael L. Quirino, Maria J. A. Sales
Summary: A new material PUAcyl, a non-isocyanate polyurethane synthesized from castor oil, urea, and BF3·OEt2, exhibits promising thermal stability and damping properties, suitable for daily applications such as acoustic coatings.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Polymer Science
Yan Zhao, Yuling Liang, Yingjie Yao, Hao Wang, Tong Lin, Yun Gao, Xiaoliang Wang, Gi Xue
Summary: In this study, partially disentangled ultrahigh molecular weight polyethylene (UHMWPE) was prepared by freeze-extracting, resulting in improved chain mobility. Low-field solid-state NMR using fully refocused H-1 free induction decay (FID) technique was employed to examine the chain segmental mobility during the melting process of UHMWPE with different degrees of entanglement. It was found that less-entangled UHMWPE had a harder time merging into mobile parts after detaching from crystalline lamella during melting. The use of H-1 double quantum (DQ) NMR revealed a difference in intramolecular-nucleated and intermolecular-nucleated PE before melting, but no noticeable difference between PE melts with different degrees of entanglement after melting.
Article
Engineering, Multidisciplinary
Bai Shan, Zhang XiangYu, Zang LeiLei, Ren LiXia, Yuan XiaoYan
Summary: This study demonstrates the potential of using L-arginine-based poly(ester urethane)urea (PEUU) with biodegradable poly(c-caprolactone) (PCL) for vascular grafts. By blending electrospinning with PCL in a given mass ratio, the prepared electrospun PCL/PEUU fibrous membranes show suitable mechanical properties and cell proliferation ability. The PEUU50 electrospun membrane with 1/1 mass ratio of PCL/PEUU exhibits flexibility and mechanical properties matching native blood vessels.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2022)
Article
Engineering, Environmental
Dong-Mei Xie, Ye-Xin Zhang, Yi-Dong Li, Yunxuan Weng, Jian-Bing Zeng
Summary: The study presents a method to fabricate sustainable polyurethanes from renewable castor oil, which exhibit good mechanical properties, reprocessability, and recyclability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Xiaobo Shen, Weiguo Hu, Thomas P. Russell
Article
Polymer Science
Weiguo Hu, Nitin V. Patil, Alex J. Hsieh
Article
Polymer Science
Nihal Kanbargi, Weiguo Hu, Alan J. Lesser
POLYMER DEGRADATION AND STABILITY
(2017)
Article
Chemistry, Multidisciplinary
Vivek Vattipalli, Abdul Mughis Paracha, Weiguo Hu, Huiyong Chen, Wei Fan
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2018)
Article
Biochemistry & Molecular Biology
Oyuntuya Munkhbat, Mine Canakci, Shaokuan Zheng, Weiguo Hu, Barbara Osborne, Alexei A. Bogdanov, S. Thayumanavan
Article
Polymer Science
You-Chi Mason Wu, Weiguo Hu, Yuchen Sun, David Veysset, Steven E. Kooi, Keith A. Nelson, Timothy M. Swager, Alex J. Hsieh
Article
Physics, Applied
Yuchen Sun, You-Chi Mason Wu, David Veysset, Steven E. Kooi, Weiguo Hu, Timothy M. Swager, Keith A. Nelson, Alex J. Hsieh
APPLIED PHYSICS LETTERS
(2019)
Article
Polymer Science
Joshua S. Enokida, Weiguo Hu, Huagao Fang, Brian F. Morgan, Frederick L. Beyer, H. Henning Winter, E. Bryan Coughlin
Article
Chemistry, Physical
Uzodinma Okoroanyanwu, Ayush Bhardwaj, Vincent Einck, Alexander Ribbe, Weiguo Hu, Jacobo Morere Rodriguez, Wayde R. Schmidt, James J. Watkins
Summary: Silicon carbide (SiC) and silicon oxycarbide (SiOC) ceramic/carbon nanocomposites are prepared by photothermal pyrolysis of cross-linked polycarbosilanes and polysiloxanes using a high-intensity pulsed xenon flash lamp, demonstrating excellent performance as supercapacitor electrodes.
CHEMISTRY OF MATERIALS
(2021)
Article
Polymer Science
Alex J. Hsieh, You-Chi Mason Wu, Weiguo Hu, John P. Mikhail, David Veysset, Steven E. Kooi, Keith A. Nelson, Gregory C. Rutledge, Timothy M. Swager
Summary: This study investigates the impact of composition on material properties and reveals the mechanism of high-strain-rate impact response through the design of a novel polyurethane.
Article
Chemistry, Physical
Hui Yang, Muhammad Abdullah, Joeseph Bright, Weiguo Hu, Kevin Kittilstved, Yaobin Xu, Chongmin Wang, Xiangwu Zhang, Nianqiang Wu
Summary: Hydrogen treatment of LLTO nanofibers improved ion conductivity and chemical interaction in the composite electrolyte, leading to stable battery performance at room temperature.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Yao Wu, Qin Hu, Pu Fan, Yufeng Jiang, Wenkai Zhong, Weiguo Hu, Thomas P. Russell
Summary: With the recent development of non-fullerene acceptors, organic solar cells have achieved power conversion efficiencies exceeding 18%. The morphology of the BHJ active layer is crucial in determining device performance, with PTB7-Th/ITIC showing better performance than PTB7/ITIC due to smaller pi-pi stacking distance and domain size.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Polymer Science
Jonathan Cali, Weiguo Hu, Everett Kysor, Olaf Kohlmann
Summary: The aging behavior of polypropylene random copolymer (PP-RCP) reactor powder samples was studied using NMR relaxometry, revealing an increase in crystallinity and a decrease in segmental mobility of the interfacial phase during aging. There was a strong correlation between the population of the amorphous component and the T-2 relaxation time of the interfacial component, potentially due to secondary crystallization of the gamma form on the lateral surface of the scaffold crystallites during ambient temperature aging.
Article
Materials Science, Multidisciplinary
Chinmay Saraf, Elizabeth Stubbs, Weiguo Hu, Todd Emrick, Alan J. Lesser
Summary: This paper investigates the effect of DMMP on epoxy resins, showing that integrating DMMP into epoxy networks can improve flame retardance, stiffness, and reduce heat release, thereby slowing down combustion.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.
