Review
Polymer Science
Ilhan Uzun
Summary: This study investigates the chronological development of X-ray diffraction (XRD) methods for determining the degree of crystallinity of polymers. It proposes a new concept of degree of crystallinity and redraws all related figures. The formulas used in the methods have been updated for better understanding and application in new studies. The study also provides crystallinity values obtained in previous research and examines the applications of these methods in other studies.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Physics, Applied
Mahesh Kumar Yadav, Somnath S. Kundale, Santosh S. Sutar, Tukaram D. Dongale, Pradip Kumar, Neeraj Panwar
Summary: This study fabricated polyvinyl alcohol-graphene oxide (PVA-GO) composite as an active material for resistive switching and demonstrated non-volatile forming free resistive switching properties. The fabricated devices showed good durability and retention, with a well-resolved two-state behavior. The electrical conduction mechanism exhibited ohmic behavior in the low resistance state and space charge-limited conduction mechanism in the high resistance state at high voltage. The resistive switching behavior was explained using an appropriate model.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Thermodynamics
N. Osiecka-Drewniak, Ewa Juszynska-Galazka
Summary: The study presents a comprehensive characterization of the crystallization process of aripiprazole crystal. Results show that the degree of crystallinity calculated from light intensity data analysis, edge detection algorithm, and DSC are in agreement. The parameters of Avrami model, crystal growth dimensionality, and crystallization temperature obtained from POM and DSC methods coincide. The Avrami exponent n suggests three-dimensional crystal growth.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Polymer Science
Isik Isil Nugay, Cagla Kosak, Emre Unsal, Emel Yilgor, Iskender Yilgor, Mukerrem Cakmak
Summary: The orientation behavior of NH and CH chemical groups of poly(ethylene oxide) (PEO)-based polyurethane urea (PUU) during uniaxial stretching was investigated using spectral birefringence and ultrafast IR spectrometers. The study found that high-molecular-weight PEO-based PUUs exhibited microphase morphologies with sharp interfaces, while low-molecular-weight PEO-2000-based PUU exhibited a gradient interphase due to substantial hydrogen-bonding interactions.
Article
Polymer Science
Marta Safandowska, Cezary Makarewicz, Artur Rozanski, Rafal Idczak
Summary: This study investigates the mechanism by which low molecular weight compounds modification improves the oxygen barrier performance of cold-crystalized polylactide (PLA). The results show that incorporating a small amount of modifier into the PLA matrix greatly reduces oxygen transport properties, while further increase in the modifier content leads to deterioration of these properties. Thermal analysis reveals that the presence of modifier in the PLA matrix does not affect the degree of crystallinity. Positron annihilation lifetime spectroscopy (PALS) and density measurements provide insights into the correlation between changes in oxygen permeability parameters and molecular packing in the interlamellar amorphous region. Overall, the nanostructure of the amorphous phase, determined by the content and compatibility of the modifier with the polymer matrix, plays a crucial role in the barrier properties of PLA/modifier systems.
Article
Chemistry, Multidisciplinary
Shahaji P. Kharat, Swati K. Gaikwad, Paul Gaurav Nalam, Rahul C. Kambale, Ajit R. James, Yesh D. Kolekar, C. Ramana
Summary: Barium titanate and its associated ternary metal oxide systems are versatile materials with immense potential for various technological applications in electronics and optoelectronics.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Nazanin Ghaheri, Benjamin J. J. Austen, Gregoire Herzog, Mark Ogden, Franca Jones, Damien W. M. Arrigan
Summary: This study investigates crystallisation at the interface between two immiscible solutions by observing the spontaneous transfer of ions. The results demonstrate the ability to form ionic crystalline materials by exploiting ion transfer processes at the interface between immiscible liquids. The influence of a neutral ionophore in the organic phase on spontaneous formation of BaSO4 was also studied.
Article
Chemistry, Multidisciplinary
Kathleen M. Snook, Leo B. Zasada, Dina Chehada, Dianne J. Xiao
Summary: The morphology of electrically conductive metal-organic frameworks greatly influences their performance in energy storage and electrochemical sensing. This study reveals how partial ligand oxidation influences the morphology of Cu-3(HHTP)(2), a 2D conductive metal-organic framework, and highlights the impact of ligand oxidation on the nucleation and growth of such frameworks.
Article
Physics, Applied
Zhiyuan Xu, Xingmei Shen, Xingrong Wu, Fabin Cao, Liaosha Li
Summary: In this study, Nb2O5 was prepared by the sol-gel method and the crystallization process was investigated through thermal analysis, X-ray diffraction, UV-vis spectra, and Raman spectra. The results showed that amorphous Nb2O5 transformed into a pseudo-hexagonal phase with increasing temperature, leading to changes in crystallization degree, optical properties, and atomic arrangement. The atomic structure of Nb2O5 transitioned from short-range order to medium-range order, and then to long-range order as temperature increased.
MODERN PHYSICS LETTERS B
(2021)
Article
Nanoscience & Nanotechnology
Eilom Saias, Ariel Ismach, Ines Zucker
Summary: This study demonstrates the trade-off between mercuric removal capacity and overall stability of MoS2 adsorption material. Higher growth temperatures result in enhanced stability but poor mercuric removal, while lower growth temperatures produce excellent removal capabilities but poor stability. This research provides essential insights into the delicate balance between mercuric removal and degradation of MoS2 for the implementation of nanotechnologies in large scale systems.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Applied
Farzad Seidi, Mohsen Khodadadi Yazdi, Maryam Jouyandeh, Sajjad Habibzadeh, Muhammad Tajammal Munir, Henri Vahabi, Babak Bagheri, Navid Rabiee, Payam Zarrintaj, Mohammad Reza Saeb
Summary: This review focuses on the crystallization of polysaccharides and their applications, specifically discussing cellulose, chitin, chitosan, and starch. It also provides an overview of the applications of crystalline polysaccharides and nano-polysaccharides, as well as their physical and chemical interactions. The review aims to offer a comprehensive understanding of the relationship between crystallization and properties in polysaccharides.
CARBOHYDRATE POLYMERS
(2022)
Article
Multidisciplinary Sciences
Christopher Delre, Yufeng Jiang, Philjun Kang, Junpyo Kwon, Aaron Hall, Ivan Jayapurna, Zhiyuan Ruan, Le Ma, Kyle Zolkin, Tim Li, Corinne D. Scown, Robert O. Ritchie, Thomas P. Russell, Ting Xu
Summary: By dispersing enzymes with deep active sites, semi-crystalline polyesters can be efficiently degraded in a short period of time, with up to 98% conversion of polyester to small molecules. This method allows for complete elimination of the need to separate and landfill products in compost facilities, with degradation achieved in standard soil composts and household tap water.
Article
Materials Science, Multidisciplinary
Saeideh Hojatzadeh, Esmail Sharifzadeh, Farshad Rahimpour
Summary: A multi-stage model was proposed to predict the creep behavior of semi-crystalline polymer nano-composites, taking into account the impact of nanoparticle aggregation/agglomeration, polymer/particle interphase region, and self/induced crystallization phenomenon. The model involved a specific equivalent box model (EBM) to evaluate the roles of dispersed or aggregated/agglomerated nanoparticle domains, an analytical model to study the characteristics of the polymer/particle interphase, and a standard linear viscoelastic (SLV) model to examine the time-dependent creep behavior. Experimental tests were conducted to verify the theoretical results, showing that increasing nanoparticle content and polymer/particle compatibility enhances the resistance against time-dependent creep.
MECHANICS OF MATERIALS
(2023)
Article
Agriculture, Multidisciplinary
Yueqi An, Shanbai Xiong, Ru Liu, Juan You, Tao Yin, Yang Hu
Summary: The brittleness of surimi gels is related to the cross-linking degree, with water holding capacity decreasing and pore equivalent diameter and fractal dimension showing a trend of first decreasing and then increasing with the increase in cross-links. Controlling cross-links appropriately can regulate the texture of surimi gels and improve product mouthfeel.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2021)
Article
Biochemistry & Molecular Biology
Tao Han, Hongxia Liu, Shulong Wang, Shupeng Chen, Kun Yang, Zhandong Li
Summary: Research on van der Waals heterostructures constructed from different two-dimensional materials, where the distribution, Raman and photoluminescence spectra are analyzed by optical microscopy and Raman spectrometry to study growth mechanisms and optical properties. The study also explains the internal mechanisms of Raman and PL spectral changes through analyzing junction and non-junction regions between 2D-2D vdWs heterostructure materials.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Zhuo-Ting Huang, Guo-Biao Xue, Jia-Ke Wu, Shuang Liu, Huan-Bin Li, Yu-Hui Yang, Feng Yan, Paddy K. L. Chan, Hong-Zheng Chen, Han-Ying Li
CHINESE CHEMICAL LETTERS
(2016)
Article
Polymer Science
Yuhui Yang, Hongzheng Chen, Hanying Li
Article
Chemistry, Physical
Houkuan Tian, Yuhui Yang, Jia Ding, Wanglong Liu, Biao Zuo, Juping Yang, Xinping Wang
Article
Chemistry, Physical
Cuiyun Zhang, Li Li, Junren Chen, Yuhui Yang, Biao Zuo, Jianqiu Li, Xinping Wang
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Polymer Science
Da-Peng Hu, Min Chen, Yu-Hui Yang, Han-Ying Li
CHINESE JOURNAL OF POLYMER SCIENCE
(2020)
Article
Polymer Science
Ziyu Wang, Dandan Sun, Xin Wang, Yuhui Yang, Yun Li, Biao Zuo, Jianhua Huang, Xinping Wang
Summary: The research indicates that connecting lower-T-g blocks at the PMMA chain end can effectively enhance the mobility of the higher-T-g PMMA chain.
Article
Nanoscience & Nanotechnology
Yuhui Yang, Yongming Hong, Xinping Wang
Summary: It has been shown that tailoring the properties of semiconductor/dielectric interfaces with fluorinated polymers can improve the performance of OFETs. This study utilized the diffusion of fluorinated PMMA to construct a fluorine-rich semiconductor/dielectric interface, successfully fabricating bottom-gate OFETs with a solution-processed P3HT semiconductor layer.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Yuhui Yang, Zhexiao Xing, Ziyu Xie, Xinping Wang
Summary: The study utilized a PMMA adsorbed layer to control the chain conformations of polymer chains and achieved the ordered orientation of dipoles of polymer dielectrics. The ordered dipoles decrease energy fluctuations and the formation probability of Frohlich polarons, enhancing carrier transport in OFETs based on polymer dielectrics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Yuhui Yang, Jiali He, Yizhi Zhang, Yongming Hong, Xinping Wang
Summary: Analysis using SFG vibrational spectroscopy detected distinct interface structures between water-based and solvent-based polymer coatings. Water-based PMMA coatings showed SDS and water molecules at the interface, while solvent-based PMMA coatings exhibited direct contact between PMMA chains and the substrate. Heat treatment was found to enhance the interface structure of water-based PMMA coatings, revealing the molecular level origin of the adhesion strength difference between water-based and solvent-based polymer coatings.
APPLIED SURFACE SCIENCE
(2022)
Article
Polymer Science
Zhexiao Xing, Ningtao Zhu, Yuhui Yang, Xinping Wang, Biao Zuo
Summary: Confinement alters polymer dynamics and leads to a reduction in the glass-transition temperature (T-g) of a polymer. The reduction in T-g is related to the enhancement of dynamics at the interface caused by changes in molecular interactions. This study demonstrated that tuning molecular interactions and conformation at the interface can effectively manipulate the confinement effects of polymers, resulting in a greater T-g reduction.
Article
Polymer Science
Yuhui Yang, Quanyin Xu, Tiancheng Jin, Xinping Wang, Simone Napolitano, Biao Zuo
Summary: Deviations of chain conformations from Gaussian statistics induce entropic stress that affects the dynamics of polymer materials. Understanding its role is further complicated by the presence of enthalpic stresses, arising from the concurring change in bond energy and intermolecular interactions. By fabricating oriented poly(methyl methacrylate) brushes free from backbone deformation, the role of entropic stress on the nonisothermal relaxation of chains at both global and local levels was successfully identified. These results provide new insights into the dynamics and fundamental molecular mechanics of oriented, stressful polymer glasses, such as textile fibers.
Article
Polymer Science
Mustafa Kalay, Abidin Esidir, Mahmut Ruzi, N. Burak Kiremitler, Mustafa Serdar Onses
Summary: This study proposes stable and addressable polymer PUFs, utilizing a cross-linkable polymer system, which demonstrates high stochastic characteristics and low-cost production. The performance of the polymer features is evaluated through various analyses, and direct image authentication is achieved using feature matching algorithms.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Jingyu Jin, Guoqiang Lu, Jun Nie, Xiaoqun Zhu
Summary: Photopolymerization technology is limited in the fields of food packaging and biomedicine due to the high migration of small molecules from photoinitiators. In this study, a polymerizable 2-vinyl thioxanthone (ETX) was synthesized to improve the migration stability of photoinitiators. Macromolecular photoinitiators (PPI1, PPI2) were also prepared to further reduce migration. The results showed that the ETX/TEOA system had higher initiation performance and PPI2 displayed favorable initiation ability. Additionally, the migration of ETX, PPI1, and PPI2 in photocured film was significantly reduced. These low-migration photoinitiators have potential applications in the fields of food packaging and biological materials.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Weijie Li, Jun Nie, Yingying Zhao, Xiaoqun Zhu
Summary: This study focuses on the development of high-performance, low-migration photoinitiators. A polymerizable photoinitiator (VBP) was synthesized by introducing an ethylene group into benzophenone, and three different molecular weight single-component photoinitiators (PVBN1-3) were synthesized based on VBP. The results show that these new photoinitiators have stronger absorption ability compared to benzophenone and significantly reduce the migration of initiators and co-initiators, addressing the safety concerns caused by migration.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Seira Morimune-Moriya, Yuki Iwahashi, Mitsuru Nakamura, Daisuke Ogawa, Keiji Nakamura
Summary: This study investigates the effect of plasma treatment on carbon nanotubes (CNTs) and the structure/properties of polyimide (PI) nanocomposites with ultra-low content of CNTs. The results show that plasma treatment introduces isocyanate groups on the surface of CNTs and enhances the interfacial interaction between PI and treated CNTs. This leads to a significant improvement in the mechanical properties of the nanocomposites, with even a small addition of treated CNTs showing a substantial increase in Young's modulus, tensile strength and toughness.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Yuanlong Li, Chaojie Chen, Guoqing Cui, Li Liu, Chao Zhou, Guangfeng Wu
Summary: In this study, a novel ion-conducting hydrogel was fabricated using a straightforward approach. The hydrogel showed excellent tensile properties and high toughness due to physical interactions and covalent binding. Additionally, the introduction of hydroxyethyl cellulose and lithium chloride improved the biocompatibility, mechanical properties, electrical conductivity, and frost resistance of the hydrogel, demonstrating its potential for cold climate applications.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Dengwei Yan, Jinxian Yang, Xuejun Pan, Xiaozheng Duan, Lianwei Li, Mo Zhu
Summary: The influence of backbone length on grafting efficiency during the graft-onto reaction process was investigated. It was found that the polydispersity effect of backbone length does not affect the final grafting efficiency, indicating that the local dynamics of chain segments dominate the graft-onto process.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Zhaoyi Luo, Xianjie Pan, Fanqi Liu, Quanxi Yi, Yanning Zeng, Yunhua Chen, Chaoyang Wang
Summary: This study provides a method to prepare high-performance epoxy materials with good malleability and thermal stability. The materials have self-healing and welding capabilities, thanks to the addition of specific chemical bonds and network structures. They exhibit mechanical properties comparable to commercial epoxy resins and show great potential for sustainable industrial development.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Chaoji Xiong, Hao Wang, Lihua Deng, Kun Liang, Chunhua Wu, Wei Wu, Qian Chen
Summary: In this study, four polyamides were synthesized and their adsorption performances for Hg2+ in aqueous systems were investigated. The polyamides exhibited high adsorption capacities and excellent reusability, with the involvement of sulfur, nitrogen, and oxygen in the chemical adsorption process of Hg2+.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Siim Laanesoo, Olivier Bonjour, Rauno Sedrik, Iris Tamsalu, Patric Jannasch, Lauri Vares
Summary: The insertion of rigid aliphatic or aromatic building blocks in polymer structures is an effective way to synthesize high -Tg polymer materials. In this study, a series of isosorbide-2-aryl carboxylate-5-methacrylate monomers (ArIMAs) were synthesized by functionalizing isosorbide 5-methacrylate with various aromatic lignin-inspired esters. These monomers were polymerized to obtain high molecular-weight poly(aryl carboxylate isosorbide methacrylates) (PArIMAs). The resulting polymers showed high glass transition temperatures and thermal stability, making them suitable for use as high-performance plastics and coatings.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Yuqian Wu, Weijie Xu, Jianliang Li, Zhangfeng Zhong, Liqing Huang, Shengke Li, Huaping Tan
Summary: This study investigates the improvement of degradation and drug release characteristics of dynamic Schiff base-mediated natural polysaccharide hydrogels using tannic acid (TA), leading to enhanced stability and functionality.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Xi Zhang, Xiangli Kong, Xin Zhou, Yiyan Gao, Yibo Sun, Guanghui Gao, Wei Liu, Kai Shi
Summary: Conductive hydrogels have great development prospects in flexible strain sensors, but long-term direct contact with human skin can cause bacterial infection. A hydrogel with antibacterial, biocompatibility, and toughness was designed and manufactured using a freeze-thaw method. The hydrogel maintains tensile properties and fatigue resistance at low temperatures and is resistant to bacteria. Therefore, hydrogel sensors can be used to monitor human movements.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Wei Zhang, Jiangang Yu, Mingyang Wu, Rui Li, Anqiang Zhang, Yaling Lin
Summary: In this study, polyacrylamide containing quaternary ammonium salts (PAM-X) were synthesized and found to effectively inhibit soil-borne pathogenic fungi while maintaining the balance of microbial population in soil. PAM-X also showed low toxicity to earthworms and fish, providing a new method for the prevention and control of soil-borne fungal diseases.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Jiawen He, Haojie Yu, Li Wang, Jian Yang, Yanhui Zhang, Wenbing Huang, Chenguang Ouyang
Summary: This review discusses the use of polymeric hydrogels for atmospheric water harvesting (AWH), including the mechanism of water sorption, fabrication methods, and strategies for optimizing the structure of hydrogels. The extended applications of hygroscopic photothermal hydrogels, such as agricultural irrigation and dehumidification, are also explored. The challenges and prospects of using polymeric hydrogels for AWH are summarized.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Ying Du, Shuaishuai Lu, Yuanna Sun, Qingshan Li, Xinhai He
Summary: This study introduces a method to improve the performance of hydrogels by incorporating proline, resulting in hydrogels with excellent stretchability, high conductivity, and long-term stability. The hydrogel remains flexible and conductive even at ultra-low temperatures.
EUROPEAN POLYMER JOURNAL
(2024)
