Article
Polymer Science
Janetty Jany Pereira Barros, Carlos Pereira Soares, Esperidiana Augusta Barretos de Moura, Renate Maria Ramos Wellen
Summary: This study investigates the effect of gamma radiation on the interaction between kraft lignin and PBAT/PLA blend. The results show that irradiation promotes the miscibility and compatibility of PBAT/PLA/lignin. The crystallization peak of PBAT/PLA/lignin shifts to lower temperatures and the crystallization rate decreases after irradiation.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
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
Polymer Science
Ana Beatriz de Sousa Barros, Janetty Jany Pereira Barros, Suellen Veloso Corte Real Coutinho, Ananda Karoline Calvacanti Albuquerque, Danilo Diniz Siqueira, Andreas Ries, Renate Maria Ramos Wellen
Summary: This study investigates the thermal stability of crosslinking polyethylene (XPE) in different environments. The results show that XPE has higher thermal stability compared to PE, with 0.5XPE exhibiting the best performance.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Alireza Bahramian
Summary: In this study, the environmental sustainability, mechanical durability, and thermal stability of PET-based nanocomposite films were evaluated compared to pure PET. The addition of different nanoparticles had significant effects on the properties of the samples, with the interaction of SiO2NPs with PET chains showing the most promising improvement in sample performance.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Saeed Dolatshah, Shervin Ahmadi, Amir Ershad-Langroudi, Hedieh Jashni
Summary: This study investigated the synergistic effect of different chain extenders and catalysts on the rheological behavior of PET, finding that a combination of PMDA and PENTA at 1.5% and 0.5% respectively resulted in the best rheological properties for modified PET. Additionally, DBTDL acted as an accelerator for chain extension reaction, improving the rheological properties of PET by increasing the chain extending rate. Thermal properties of modified PET were also studied using differential scanning calorimetry.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Thermodynamics
Daniele Sonaglioni, Elpidio Tombari, Simone Capaccioli
Summary: Fast scanning calorimetry is a useful experimental technique that can suppress reorganization processes. This paper proposes a new method for estimating the dynamical thermal lag and provides a novel interpretation of heat flow losses due to the sample. The use of glass to liquid transition is also shown as a new method to reveal static thermal gradients.
THERMOCHIMICA ACTA
(2023)
Article
Engineering, Environmental
Hajo Bitter, Susanne Lackner
Summary: Differential scanning calorimetry (DSC) can be used to quantify microplastics, with improved detection accuracy and limits achieved through defined pre-heating and cooling steps. The method is shown to be feasible for environmental samples, with quantification limits and accuracy demonstrated for various polymers such as PE, PET, PP, and PA6.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Medicinal
Tamaki Miyazaki, Ryo Mizoguchi, Keisuke Ueda, Taeko Shinozaki, Mie Kamoto, Yoshihiro Takeda, Satoshi Sakuma, Naoya Ito, Michiko Momo, Kohsaku Kawakami
Summary: High inter-laboratory reproducibility is crucial for collaborative experiments among multiple laboratories. In this study, we aimed to establish a protocol for isothermal storage tests to ensure consistent data quality from all participating laboratories. Sharing a detailed protocol similar to the experimental section of general papers was not sufficient for achieving high inter-laboratory reproducibility. By investigating the causes of data variations among laboratories, we gradually refined the protocol to improve reproducibility. Specific instructions on sample temperature control during transfer contributed to reducing variability. Our findings also revealed differences in the physical stabilities of amorphous drugs when prepared in differently shaped aluminum pans designed for various differential scanning calorimeters.
JOURNAL OF PHARMACEUTICAL SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Jolanta Tomaszewska-Gras, Mahbuba Islam, Liliana Grzeca, Anna Kaczmarek, Emilia Fornal
Summary: This study aimed to describe the thermal properties of selected cultivars of flaxseed oil using the DSC technique. Findings revealed characteristics of crystallization and melting profiles, as well as the influence of temperature and heating rate on the stability of flaxseed oil during thermal oxidation. Negative correlations were observed between unsaturated fatty acid content and thermal properties.
Article
Polymer Science
Fatemeh Razmjoo, Ehsan Sadeghi, Milad Rouhi, Reza Mohammadi, Razieh Noroozi, Saeede Safajoo
Summary: The study found that PVA blend films with Zedo gum had better properties compared to pure PVA films, but some properties may decrease with higher ZG content. However, films with higher ZG concentration are suitable for packaging various food and non-food products.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
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
Chemistry, Medicinal
Ekaterina Bogdanova, Anna Millqvist Fureby, Vitaly Kocherbitov
Summary: The paper presents a DSC study on ice crystallization and melting in a sucrose-water system. It investigates the influence of cooling and heating rates on the thermal behavior of sucrose-water solutions and explores the reasons for the existence of two steps on DSC heating curves. The results show that diffusion of water can be a limiting factor for ice growth and melting in the sucrose-water system.
JOURNAL OF PHARMACEUTICAL SCIENCES
(2022)
Article
Environmental Sciences
Lucas Kurzweg, Sven Schirrmeister, Maurice Hauffe, Yasmin Adomat, Martin Socher, Kathrin Harre
Summary: This study presents a potential method for comprehensive microplastic monitoring in river sediments, combining electrostatic separation, density separation, and differential scanning calorimetry. The method allows for efficient processing of large sample masses and robust results, overcoming current limitations in microplastic analysis. It can be applied for monitoring microplastics in highly polluted sediments.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Engineering, Multidisciplinary
Raja Elarem, Talal Alqahtani, Sofiene Mellouli, Gaber A. El Awadi, Salem Algarni, Lioua Kolsi
Summary: This study investigates the impact of dispersed aluminum (Al) and copper (Cu) nanoparticles on the thermophysical properties of paraffin wax. The results show that the dispersion of nanoparticles can decrease the melting temperature and increase the solidification temperature of paraffin wax. However, it also increases the dynamic viscosity and limits the dispersion. Moreover, the nanocomposites with mass fractions of 2% Al and 1% Cu exhibit better enhancements in thermal storage characteristics compared to higher mass fractions.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
