Article
Polymer Science
Liang He, Guo Lin, Xiaobo Liu, Lifen Tong
Summary: In this study, self-reinforced cross-linked polyarylene ether nitrile films were fabricated and their properties were finely tuned by controlling the crystallinity of PEN-OH. The CPEN films exhibited excellent performance and offered a new approach for designing high-performance polymeric dielectric materials.
Article
Polymer Science
Akihiko Toda
Summary: The crystallization kinetics of poly(butylene terephthalate) under high supercooling was investigated using Temperature-Modulated Fast Scanning Calorimetry (TM-FSC). The study found a temperature dependence of crystal growth rate and compared it with the peak time of heat flow during isothermal crystallization. The crystal growth rate was found to be practically determined by a mobility factor near the glass transition.
Article
Materials Science, Ceramics
Sajad Sohrabi, Reza Gholamipour
Summary: The addition of a small amount of Nb in the metallic glass samples studied resulted in a lower crystallization activation energy, indicating that Nb microalloying makes crystallization transformation easier. Moreover, the Nb minor addition delayed the onset of crystallization but accelerated the crystallization progress, resulting in a narrower crystallization transformation region. Additionally, the Avrami exponents for both non-isothermal and isothermal conditions were higher in the Nb-containing sample, indicating increased nucleation rates in this glassy alloy.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Semen E. Lapuk, Marat A. Ziganshin, Radik A. Larionov, Timur A. Mukhametzyanov, Christoph Schick, Alexander V. Gerasimov
Summary: Robust determination of parameters governing the stability of amorphous drugs is crucial in modern pharmaceutics. The kinetic stability of these systems greatly impacts their practical applications. This study determined the critical cooling rates and kinetic parameters of cold crystallization for four slowly crystallizing sulfonamides. The Nakamura crystallization model demonstrated good prognostic ability by determining the stability time profile of drug systems prone to crystallization from non-isothermal thermokinetic data.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Polymer Science
Tiziana Bardelli, Claudia Marano, Francesco Briatico Vangosa
Summary: This study systematically investigated the crosslinking kinetics of Sylgard184 polydimethylsiloxane under isothermal and dynamic conditions. The results showed that rheological analysis was more sensitive over longer periods of time compared to thermal analysis. The gel point occurred at alpha(R) = 0.53, while alpha(C) was around 0.30 at the gel point, indicating that about 30% of the bonds involved in the crosslinking process were sufficient to create an infinite network. A modified version of Kamal's autocatalytic model was able to fit and predict the experimental findings.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Kepa Zulueta, Alex Arrillaga, Philipp S. Stelzer, Inaki Martinez
Summary: In this study, the cure kinetics of an epoxy-based carbon fiber SMC were characterized using DSC and MDR techniques, with results indicating that the MDR technique provides more accurate results.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Thermodynamics
Xiaoshi Zhang, Jason D. Alexander, Jiho Seo, Anne M. Gohn, Matthew J. Behary, Richard P. Schaake, Ralph H. Colby, Alicyn M. Rhoades
Summary: The interior structure of PEEK composite pellets was reconstructed using ultra-high-resolution X-ray computed tomography (XCT), and different slicing methods were analyzed. For samples with thickness less than 50μm, PEEK samples sliced perpendicular to the fiber flow direction showed good filler homogeneity and lower coefficient of variation compared to samples sliced along the fiber flow direction. This conclusion was supported by further studies on the crystallization kinetics of PEEK and its composites.
THERMOCHIMICA ACTA
(2023)
Article
Materials Science, Ceramics
Hongwei Guo, Shouyi Guo, Yibo Gao, Lei Liu, Longxing Chi, Yun Bai, Relva C. Buchanan, Yuxuan Gong
Summary: Glass has excellent friction, lubricating properties, and thermal stability, making it widely used in mechanical processing and other applications. This study analyzed the nucleation and crystal growth kinetics of SBBC system glasses and determined their crystallization kinetic parameters. The effects of time, temperature, and crystal phase on the crystallization rate curves were established. The crystal precipitation process of SBBC system glasses was verified through SEM images, and the negative effect of early crystallization on lubricating properties was observed.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Polymer Science
Chiah-Hsiung Tseng, Ping-Szu Tsai
Summary: The crystallization kinetics and behavior of solvent-precipitated nylon 66 (SP PA66) were studied using DSC, POM, and XRD. The Avrami equation and modified Avrami equations were used to describe the isothermal and nonisothermal crystallization of SP PA66. The results showed that SP PA66 had higher crystallization rate constant, crystal perfection, and different crystal morphology and size compared to neat PA66.
Article
Nanoscience & Nanotechnology
Shamshad A. Khan, Imtayaz H. Khan, M. Shaheer Akhtar, Ismail Ekmekci, Tae-Geum Kim, Mohamed Hashem, Najm M. Alfrisany, Hassan Fouad, Archana Srivastava
Summary: This study examined the structure, crystallization kinetics, and physical characteristics of Se85Te15-xAgx (x = 3, 6, 9, and 12) chalcogenide glasses. The crystallization kinetics in these glasses were studied using various methods. Bulk alloys of Se85Te15-xAgx were created through the melt quenching process, and their amorphous nature was confirmed using HRXRD. The crystallization kinetics of the glasses were studied using non-isothermal DSC measurements, and the different characteristic temperatures were determined from DSC thermograms.
SCIENCE OF ADVANCED MATERIALS
(2023)
Article
Thermodynamics
S. P. Magalhaes da Silva, Monica A. Silva, Jose M. Oliveira
Summary: This study investigated the non-isothermal cold crystallization behaviors of cork-polymer composites based on polylactic acid matrix. The results showed that cork powder residues act as a nucleating agent, accelerating the crystallization rate and reducing the half-time crystallization values. Additionally, the addition of cork was found to decrease the cold crystallization temperature of the PLA matrix.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Polymer Science
Shouang Wu, Bocheng Wang, Xiaoling Xu, Chonggang Wu, Tao Hu, Xuan Zheng, Xinghou Gong
Summary: The addition of S-MA compatibilizer had a positive impact on the dispersion and crystallization behavior of SBS in PLA blends. The study found that SBS exhibited both plasticization and dilution effects under different conditions, with the effects being enhanced with increasing S-MA content.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Ceramics
A. D. Plekhovich, A. M. Kut'in, E. E. Rostokina, M. E. Komshina, K. V. Balueva, K. F. Ignatova, V. S. Shiryaev
Summary: The study investigated the crystallization behavior and melting of phases in the BaO-B2O3-Bi2O3 glass-forming system using differential scanning calorimetry. By analyzing the crystallization parameters and composition of crushed glass samples, the study identified compositions with high stability against crystallization and recommended time-temperature modes for synthesizing glass-ceramics.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Polymer Science
Yoshitomo Furushima, Christoph Schick, Akihiko Toda, Hideaki Takahashi, Toshiumi Tatsuki, Satoshi Fujiwara, Kazuma Okada, Masatoshi Ohkura
Summary: Fast scanning calorimetric experiments were conducted to investigate the effect of pre-nucleation on the crystallization and melting kinetics of low-isotacticity polypropylene (LT-PP). The presence of crystal nuclei accelerated the isothermal crystallization rate of LT-PP, but had no effect on the melting kinetics of secondary crystallized LT-PP. Moreover, increasing amounts of crystal nuclei resulted in a decrease in the maximum primary crystallization, which can be attributed to the formation of uncrystallizable defects between the crystalline domains.
Article
Polymer Science
Chia-Hsiung Tseng, Ping-Szu Tsai
Summary: This study synthesized a series of new biobased copolyamides and investigated their structures, behaviors, and crystallization kinetics. The results showed that the composition of the copolyamides affected their mechanical properties and thermal stability.
Article
Chemistry, Multidisciplinary
Lifen Tong, Yajie Wang, Yong You, Ling Tu, Renbo Wei, Xiaobo Liu
Article
Engineering, Electrical & Electronic
Yaqi Chen, Lifen Tong, Guo Lin, Weixi Zhang, Qinglin Zeng, Xiaobo Liu
Summary: Advanced carbon materials with tunable priority and composition, such as nitrogen self-doped porous carbon materials (NPCM), have shown promising potential as electrode materials for high-performance supercapacitors. The NPCM exhibited moderate specific surface area and nitrogen content, leading to a great specific capacitance attributed to appropriate pore structure and functional groups derived from heteroatom doping.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Polymer Science
Shuning Liu, Chenchen Liu, Zhongxiang Bai, Weixi Zhang, Lifen Tong, Xiaobo Liu
Summary: Polyarylene ether nitrile (PEN) based on biphenol exhibits high glass transition temperature, tensile strength, and low elongation at break. Improved PEN random copolymers with higher elongation at break and excellent mechanical, thermal, and dielectric properties have been synthesized, showing potential for high-temperature resistant applications in insulated cables.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Tiange Lan, Weixi Zhang, Yajie Wang, Shuning Liu, Chenchen Liu, Lifen Tong, Xiaobo Liu
Summary: h-BN-GO fillers have been designed using a simple ultrasonic blending method, leading to the creation of flexible dielectric films with high mechanical properties and thermal stability in various industries.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Engineering, Multidisciplinary
Linsen Zuo, Kui Li, Dengxun Ren, Mingzhen Xu, Lifen Tong, Xiaobo Liu
Summary: By modifying the aramid fiber, a composite material with improved performance, including surface morphology, interfacial adhesion strength, and interlaminar shear strength, was obtained.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Chen-Jiang Wu, Li-Fen Tong, Wei-Xi Zhang, Xiao-Bo Liu
Summary: This study focuses on improving the performance of PEN by synthesizing crystalline copolymers HQ/BPA-PEN, which exhibit excellent thermal and mechanical properties, with HQ/BPA-PEN85 copolymer showing the best results. These copolymers have potential applications in high temperature resistant materials and electronic materials.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Chemistry, Physical
Shuning Liu, Ling Tu, Chenchen Liu, Lifen Tong, Zhongxiang Bai, Guo Lin, Kun Jia, Xiaobo Liu
Summary: This study focuses on preparing high-temperature resistant composites by introducing nitrile-functionalized agents on the surface of multiwalled carbon nanotubes. The resulting composites exhibit excellent mechanical, thermal, and dielectric properties, making them suitable for energy storage applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Linsen Zuo, Chenjiang Wu, Lifen Tong, Xiaobo Liu
Summary: Aramid fiber (AF)-reinforced composite with polyarylene ether nitrile terminated with phthalonitrile (PEN-t-Ph) modification shows improved performance, with the molecular weight of PEN-t-Ph having a significant impact on mechanical properties and interface compatibility of the composite laminate. Adjusting the molecular weight of PEN-t-Ph resin can enhance the overall performance of the composite laminate, providing new possibilities for AF-reinforced materials.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Multidisciplinary
Chenjiang Wu, Linsen Zuo, Lifen Tong, Xiaobo Liu
Summary: In this study, a crystalline PEN copolymer was synthesized using random copolymerization method and modified through heat treatment and thermal stretching. The final sample showed excellent performance with high thermal decomposition temperature, mechanical tensile strength, low dielectric constant, and low dielectric loss. This new effective method provides potential application value for modified PEN copolymers in high temperature resistance and electronics.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Yaqi Chen, Lifen Tong, Guo Lin, Xiaobo Liu
Summary: In this study, SWCNTs/phthalocyanine polymer composite derived self-nitrogen-doped graphene-like porous carbon (SPCM) was synthesized through a simple solution blending and mechanical stirring method. The SPCM showed high specific capacitance and excellent stability as an electrode material for supercapacitors.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Coatings & Films
Yunqing Xia, Shuai Zhang, Lifen Tong, Shuning Liu, Guo Lin, Zhongxiang Bai, Yi He, Xiaobo Liu
Summary: This study introduces poly(arylene ether nitrile) (PEN) as a protective coating on metallic substrates for the first time, and incorporates cyano-functionalized multiwalled carbon nanotubes (MWCNTs-CN) to enhance corrosion resistance and mechanical performance. The electrochemical results demonstrate outstanding corrosion resistance and improved tensile strength of the MWCNTs-CN/PEN coating. This work provides a novel insight in high-performance protective coating.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Polymer Science
Ying Zhu, Lifen Tong, Xiaobo Liu
Summary: A novel series of polyarylene ether nitrile (PEN) random copolymers with higher T-g and improved mechanical and electrical properties were synthesized. The performance of PEN random copolymer could be controlled by adjusting the mole ratio of BP to ND. The copolymers with 15% ND exhibited the best comprehensive performances.
HIGH PERFORMANCE POLYMERS
(2022)
Article
Polymer Science
Liang He, Lifen Tong, Xiaobo Liu
Summary: A novel high-temperature-resistance phthalonitrile end-capped polyarylene ether nitrile (HTR-PEN-Ph) film was fabricated via cross-linking reaction, showing excellent thermal and mechanical properties. It has great potential for industrial manufacturing.
HIGH PERFORMANCE POLYMERS
(2022)
Article
Engineering, Electrical & Electronic
Tianrui Li, Chenjiang Wu, Chenchen Liu, Liang He, Yingfa Liu, Yunqing Xia, Guo Lin, Lifen Tong, Xiaobo Liu
Summary: This study investigated the influence of carbon nanotubes (CNTs) content on the crystallization behavior and dielectric properties of semi-crystalline polyarylene ether nitrile (PEN). The results showed that the introduction of CNTs significantly improved the crystallization properties of the PEN/CNTs composite, resulting in increased heat resistance, good mechanical strength, and toughness.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Polymer Science
Liang He, Lifen Tong, Yunqing Xia, Guo Lin, Ting Wang, Wanru Zhang, Yingfa Liu, Xiaobo Liu
Summary: A novel polymer was prepared by combining phthalonitrile end-capped polyarylene ether nitrile (PEN-Ph) and bisphthalonitrile (BPh) using post-solid phase chemical reaction technology. The mechanical properties of the PEN-Ph/BPh composite materials were significantly improved by changing the pre-polymerization time of BPh. Furthermore, the composite films exhibited excellent thermal properties and dielectric stability, making them suitable for use in high-temperature electronic fields.
