Article
Polymer Science
Xiaodong Yang, Bin Yu, Hui Sun, Nan Wang, Peng Liu, Jiangli Feng, Xiaogang Cui
Summary: The study investigated the crystallization kinetics, morphology, and structure of ECTFE using DSC, POM, and XRD, revealing various patterns of crystallization processes and changes in crystalline degree.
Article
Polymer Science
Beata Misztal-Faraj, Marcelina Ciupak, Ryszard Pecherski, Leszek Jarecki
Summary: The study analyzes the development of polymorphic composition in the isothermal crystallization process of unstressed amorphous PLLA, and predicts the relationship between the transformation degree of individual polymorphs and crystallization temperature as well as the overall transformation degree.
Article
Thermodynamics
Ahmadreza Abbasi, Ali Naeim Abadi, Farkhondeh Hemmati, Jamshid Mohammadi-Roshandeh, Tara Farizeh
Summary: This study evaluates the influences of SBS, NC, and m-SEBS on the non-isothermal crystallization kinetics of PA12 using various theoretical models. The interrelations among the crystallization kinetics variables, morphology, and molecular dynamics of PA12/SBS rubber/NC mixtures were thoroughly investigated. The results show that the PA crystallization rate increases with the compatibilizer level, reaches a maximum value with NC loading and SBS content, and is affected by the heterogeneity of nucleation sites provided by NC platelets and SBS particle surfaces.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Polymer Science
Xincheng Guo, Xiaoyu Xu, Zhuyu Bai, Xiaolang Chen, Jun Qin
Summary: The study investigated the crystallization behaviors of PP composites with LDH and SLDH, showing that they affect the crystallinity and crystallization rate of PP. LDH acts as a heterogeneous nucleating agent, resulting in differences in nucleation capacity and crystallization rate compared to SLDH.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Polymer Science
Beata Misztal-Faraj, Leszek Jarecki, Ryszard B. Pecherski
Summary: This paper formulates a kinetic model for the polymorphic crystallization of uniaxially oriented amorphous poly(L-lactide) based on the Hoffman-Lauritzen theory. The model considers the entire ranges of crystallization temperatures and amorphous orientation factor. The model predicts that the crystallization to the stable α form is controlled by the rate of transformation from the amorphous phase to α'.
Article
Materials Science, Multidisciplinary
Janos Molnar, Ors Sepsi, Balint Gaal, Zita Zuba, Monika Dobrzynska-Mizera, Alfred Menyard
Summary: This study introduces a novel method to estimate the morphology of semicrystalline polymers based on experimental crystallization conversion curves, utilizing a fast and accurate probabilistic numerical simulation method to handle the crystallization process. The method was successfully used to predict haze of injection-molded samples, demonstrating the reliability and applicability of the new approach.
MATERIALS & DESIGN
(2021)
Article
Polymer Science
Mohammed Naffakh, Pablo Rica, Carmen Moya-Lopez, Jose Antonio Castro-Osma, Carlos Alonso-Moreno, Diego A. Moreno
Summary: In this study, hybrid nanocomposite materials were prepared by solution blending PLLA with 2D-WS2, revealing that the incorporation of 2D-WS2 influences the crystallization rate and final crystallinity of PLLA, while increasing the nanosheet content leads to a transition from retardation to promotion of crystallization. The double-melting peaks observed were mainly derived from melting-recrystallization-melting processes upon heating, highlighting the potential of PLLA/hybrid nanocomposites in targeted applications.
Article
Chemistry, Applied
Zhenxing Cai, Gengfei Yang, Hui Zhao, Xiaobo Chen, Chaohe Yang
Summary: The crystallization kinetics of para-xylene was measured using morphology and DSC methods. Solubility data from DSC experiments were fitted using activity coefficient model and solid-liquid phase equilibrium theory, while the rates of nucleation, growth, aggregation, and breakage were determined from morphological experiments. A population balance equation was used to model particle size distribution and validated with experimental data. The effects of crystallizer operating temperature and residence time on product yield were investigated, suggesting an optimal temperature and residence time for the crystallization process. The models developed can be applied in process design and optimization.
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2023)
Article
Polymer Science
How Wei Benjamin Teo, Van Thai Tran, Kaijuan Chen, Kim Quy Le, Hejun Du, Jun Zeng, Kun Zhou
Summary: This study simulated the isothermal crystallization process of PA12 using a phase field model and proposed a temperature-dependent spherulite morphology. The model can be used to evaluate the properties of printed parts.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
Shan Zhang, Chao Wei, Jingwang Lv, Haoran Zhang, Zhilin Shi, Xinyu Zhang, Mingzhen Ma
Summary: The crystallization kinetics of Zr50Cu34Al8Ag8 bulk metallic glass under non-isothermal conditions was studied using differential scanning calorimetry. The activation energies were calculated and the crystallization mechanism was explored, revealing that the crystallization is mainly governed by diffusion-controlled three-dimensional growth.
Article
Metallurgy & Metallurgical Engineering
Jiangling Li, Feifei Lai, Mei Leng, Qingcai Liu, Jian Yang, Shan Ren, Ming Kong
Summary: The study revealed that the morphology of cuspidine changes from dendritic to blocky shapes with variations in temperature and basicity, indicating alterations in internal structure.
IRONMAKING & STEELMAKING
(2021)
Article
Chemistry, Multidisciplinary
Aboulfazl Barati, Pixiang Wang, Shaoyang Liu, Erfan Dashtimoghadam
Summary: Plastics were developed to change our world for the better, but plastic pollution has become a serious global environmental crisis. This work presents an in-depth analysis of the non-isothermal crystallization kinetics of recycled polyethylene terephthalate (rPET) and recycled polypropylene (rPP) blends. The study investigates the effect of pyromellitic dianhydride (PMDA) on crystallization kinetics and phase morphology of the blends. The findings have significance for the recycling/upcycling of thermoplastics through non-isothermal fabrication processes.
Article
Chemistry, Multidisciplinary
Nurshahzanani Shahrir, Siti Nurul'ain Yusop, Nornizar Anuar, Hamizah Mohd Zaki, Yoichi Tominaga
Summary: This work investigates the impact of solvents on the morphology of urea crystals through experimental and molecular modeling approaches. The research finds that the aspect ratios of urea crystals grown in different polar protic solvents vary significantly. The study attempts to establish a correlation between various factors and crystal morphology but finds that these factors cannot accurately predict the aspect ratios of the crystals.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Polymer Science
How Wei Benjamin Teo, Kaijuan Chen, Van Thai Tran, Hejun Du, Jun Zeng, Kun Zhou
Summary: This study investigates the shrinkage phenomenon of PA12 during crystallization process, with different cooling rates affecting its crystallization behavior and crystal shrinkage. The crystallization shrinkage of PA12 is found to be closely related to the exothermic reaction during the crystallization process, and XRD suggests that shrinkage are related to crystal growth.
Article
Engineering, Chemical
Yi Dang, Jiali Ai, Jindong Dai, Chi Zhai, Wei Sun
Summary: This paper investigates the influence of environmental conditions on dendritic morphology and explores the application of the phase-field method and cellular automaton method. It is found that the result of the phase-field method can be approximated by adjusting the parameters of the cellular automaton model.
