Article
Polymer Science
Alexandre Perrot, Jan Hyrsl, Jan Bandzuch, Simona Wanousova, Jiri Hajek, Jan Jencik, Tomas Herink
Summary: DCPD modified UPRs are commonly used for hulls, decks, and bathroom facilities due to advantages like low shrinking, reduced styrene emission, lower cost, and fast curing. However, these materials become more brittle and have lower glass transition temperatures and chemical resistance after curing. The quality of DCPD can be adjusted using a unique distillation process, and the influence of MeDCPD on UPR properties has been examined, showing softer and brittle material at higher concentrations. Adjusting the unsaturation degree allows successful incorporation of MeDCPD in UPR formulation.
Article
Polymer Science
Moritz Stuck, Irina Krenz, Benedikt Schulze Koekelsum, Susanne Boye, Brigitte Voit, Reinhard Lorenz
Summary: The study focused on the influence of different curing conditions and styrene concentrations on the resin properties, demonstrating that the Tg of the network can be increased by applying new thermal curing profiles and increasing the styrene content. Additionally, the partial substitution of problematic styrene with substances like maleic anhydride was found to significantly improve the reactivity and mechanical properties of the resin.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Lazaros Papadopoulos, Lamprini Malletzidou, Dimitra Patsiaoura, Andreas Magaziotis, Eleni Psochia, Zoi Terzopoulou, Konstantinos Chrissafis, Charles Markessini, Electra Papadopoulou, Dimitrios N. Bikiaris
Summary: This study aimed to prepare unsaturated polyester resins with biobased content using renewable feedstocks, evaluating their synthesis by various spectroscopical techniques and utilizing reactive diluent for processing. Acrylic acid was then introduced as cross-linking agent to produce thermosetting resins, which were evaluated using DSC, XPS, FTIR, and TGA techniques.
APPLIED SCIENCES-BASEL
(2021)
Article
Green & Sustainable Science & Technology
Bo Sun, Jie Zhang, Maolin Wang, Shixiang Yu, Yao Xu, Shuheng Tian, Zirui Gao, Dequan Xiao, Guosheng Liu, Wu Zhou, Meng Wang, Ding Ma
Summary: The authors developed a two-step catalytic process to convert PLA into methyl methacrylate, achieving sustainable valorization of waste PLA and reducing CO2 emissions.
NATURE SUSTAINABILITY
(2023)
Article
Materials Science, Characterization & Testing
Yu Gao, Haoxiang Li, Haijun Ji, Liqun Zhang, Xinxin Zhou, Runguo Wang
Summary: A novel high light transmittance material was synthesized through piecewise bulk polymerization, demonstrating high transparency, suitable thermal decomposition temperature, and low glass transition temperature for optical device applications. Contact angle tests and simulation calculations were conducted to explore factors affecting the hydrophilicity of the material surface.
Article
Chemistry, Physical
Fukai Chu, Shuilai Qiu, Shenghe Zhang, Zhoumei Xu, Yifan Zhou, Xiaoyu Luo, Xin Jiang, Lei Song, Weizhao Hu, Yuan Hu
Summary: The lack of research on structure-activity relationship and interaction mechanism between unsaturated polyester resins (UPR) and flame retardants has posed challenges for developing high-efficiency flame retardants in industry. This study synthesized various polymeric flame retardants and evaluated their thermal stabilities, uncovering the interaction mechanisms and rules for improving flame retardancy of UPR composites. Key findings included the role of gaseous phase flame retardant mechanism and the effectiveness of phosphorus structures and sulfone groups in enhancing flame retardant efficiency.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Environmental
Xiong-Lei Wang, Wen-Li An, Fei Tian, Yang Yang, Xu Zhao, Ping-Ping Xu, Shimei Xu, Yu-Zhong Wang
Summary: This study obtained styrene-maleic acid copolymer (SMC) by selectively and completely cleaving ester groups from waste thermosetting unsaturated polyester resins (WTUPR), which was then integrated with polyvinyl alcohol to form amphiphilic aerogels with low density and high absorption capacity for both water and oily liquids.
Article
Polymer Science
Poovathungal Abdulrahman Jeemol, Suresh Mathew, Chethrappilly Padmanabhan Reghunadhan Nair
Summary: Blending unsaturated polyester resin (UPR) with itaconimide-end terminated polyethers can significantly improve the mechanical properties of the UPR, resulting in enhanced impact strength and fracture toughness. The distribution of the polyether chains in the cured matrix, influenced by the reactivity ratios of styrene and the polyether macromer, plays a crucial role in determining the properties of the blend.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Materials Science, Characterization & Testing
Se Hyeon Ju, Eun Jin Jeong, Hui Il Jeon, Yong Seok Kim, Youngjae Yoo, Sungmin Park
Summary: This study investigates the miscibility, rheological properties, and physical/optical properties of PC/PMMA-co-PPhMA blends. It was found that the blends exhibited a single glass transition behavior and differences in blend homogeneity were observed. PMMA-co-PPhMA with 14 mol% PhMA showed the best miscibility and phase homogeneity. Increasing the weight percentage of PMMA-co-PPhMA improved the scratch resistance but reduced the optical transparency. The PC/PMPA-2 blend demonstrated optimal rheological, mechanical, and optical properties. This study provides insights into PC-based blend materials for various industrial applications.
Article
Biochemistry & Molecular Biology
Bo-Yeong Yu, Hoang Hai Ngo, Won Jun Choi, Young-Sam Keum
Summary: In this study, it was observed that dimethyl itaconate (DMI) inhibits melanogenesis in B16F10 cells by decreasing the expression of microphthalmia-associated transcription factor (MITF) and its target genes. DMI also reduces the level of melanocortin 1 receptor (MC1R) and the production of alpha-melanocyte stimulating hormone (alpha-MSH), resulting in the inhibition of extracellular signal-regulated kinase 1/2 (ERK1/2) and MITF activities. The structure-activity relationship (SAR) study reveals that the alpha,beta-unsaturated carbonyl group in DMI is necessary for inhibiting melanogenesis, and knocking down Nrf2 attenuates this inhibition.
Article
Engineering, Environmental
Samira Akbari, Andrew Root, Mikael Skrifvars, Sunil Kumar Ramamoorthy, Dan Akesson
Summary: Unsaturated polyester resins derived from oil-based monomers have limited applicability in high-temperature environments due to their low thermal stability. This study focuses on developing bio-based solventless unsaturated polyester resins, and results show that resins based on 2,5-furandicarboxylic acid have superior thermomechanical properties compared to commercial reference resins.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Materials Science, Multidisciplinary
Yong Li, Jiehao Qu, Zenghui Dai, Junyi Jiang, Jiajia Fu, Feiya Fu, Xiangdong Liu
Summary: The article presents a successful design of a highly bio-based family of unsaturated polyester resins by copolymerizing isosorbide with other green monomers, resulting in high-performance thermosetting resins with excellent glass transition temperature, storage modulus, and tensile strength. The incorporation of isosorbide units into the resins shows a favorable effect on thermal stability. Additionally, the compatibility between the isosorbide-containing resins and cotton fibers after reinforcement suggests potential for composite fabrication.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Polymer Science
Shuang-Lin Hu, Ying-Ming Li, Wen-Juan Hu, Jose Hobson, De-Yi Wang
Summary: A highly efficient flame retardant, MA-DOPO, was designed through a nucleophilic substitution reaction and showed promising improvement in tensile strength and flame retardancy of UPR composites. The flame-retarding mechanism involves the release of inert gas in the gas phase and catalytic carbonation in the condensed phase.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Chemistry, Multidisciplinary
Przemyslaw Paczkowski, Nadiia V. Sigareva, Borys M. Gorelov, Mariia I. Terets, Yurii I. Sementsov, Mykola T. Kartel, Barbara Gawdzik
Summary: The new scientific direction focuses on developing different nanocomposites and studying their properties. This study explores the use of carbon nanostructures in polymer matrices to expand the functionality of nanocomposites. The results show that the addition of multi-walled carbon nanotubes improves the mechanical and thermomechanical properties of the materials without significantly impacting their gloss.
Article
Engineering, Biomedical
Kentaro Hata, Hiroshi Ikeda, Yuki Nagamatsu, Chihiro Masaki, Ryuji Hosokawa, Hiroshi Shimizu
Summary: A novel nanoporous silica filler was developed and added to PMMA-based resins to improve their mechanical and physicochemical properties, suggesting potential for enhancing the strength and durability of polymer-based dental prostheses.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2022)
Article
Materials Science, Paper & Wood
Maja D. Markovic, Sanja Seslija, Vukasin Dj Ugrinovic, Matjaz Kunaver, Vesna V. Panic, Rada Pjanovic, Pavle M. Spasojevic
Summary: pH- and magnetic-sensitive hybrid hydrogels based on PMAA, NC, CMC and MN were prepared for ibuprofen delivery. Increasing wt% of NC and MN led to decreased swelling behavior and cumulative ibuprofen release in the hybrid hydrogels. The release kinetics of ibuprofen can be easily tuned by changing one hydrogel component.
Article
Engineering, Chemical
Vukasin Ugrinovic, Vesna Panic, Pavle Spasojevic, Sanja Seslija, Bojan Bozic, Rada Petrovic, Djordje Janackovic, Djordje Veljovic
Summary: This paper reports on the synthesis of PMAA/gelatin IPN hydrogels with adjustable properties through free-radical polymerization; it investigates the influence of different components in the precursor solution on the hydrogels' properties. The hydrogels exhibit pH sensitivity and promote cell proliferation.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Engineering, Biomedical
Maja D. Markovic, Julijana D. Tadic, Sanja Savic, Ivana Z. Matic, Tatjana P. Stanojkovic, Dusan Z. Mijin, Vesna V. Panic
Summary: This study investigates the potential of a hydrophilic carrier based on poly(methacrylic acid) and casein for encapsulation and controlled release of a novel poorly water-soluble compound. The results show that the carrier has great potential for application in leukemia treatment.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
(2022)
Article
Chemistry, Applied
Maja D. Markovic, Vesna V. Panic, Sanja Savic, Vukasin Dj Ugrinovic, Rada Pjanovic, Milica M. Spasojevic, Pavle M. Spasojevic
Summary: Materials sensitive to external stimuli are considered safe and effective tools in responding to specific demands in disease therapy. Thermo sensitive hydrogels based on poly(N-isopropylacrylamide) (P(NIPAAM)) have been extensively studied for targeted drug delivery. However, the abundance of stimuli in the human body often requires multiple responsive groups to act simultaneously for optimal therapeutic effects.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Polymer Science
Olga Pantic, Milica Spasojevic, Enis Dzunuzovic, Marija S. Nikolic, Sanja Savic, Maja Markovic, Pavle Spasojevic
Summary: The present study aimed to prepare fully bio-based unsaturated polyester resins (UPRs) with comparable properties to commercial formulas. The optimal prepolymer formulation using the same set of diacids and different diols or mixtures was determined, and bio-based dimethyl itaconate was used as a reactive diluent. The obtained resins were analyzed for their rheology, structural, thermal, thermomechanical, and mechanical properties. The choice of diols in the prepolymer formulation was found to significantly affect the properties of the UPRs.
Article
Engineering, Environmental
Maja D. Markovic, Milica M. Svetozarevic, Vesna V. Panic, Sanja I. Savic, Aleksandra D. Masulovic, Pavle M. Spasojevic, Rada Pjanovic
Summary: This study presents the successful synthesis of pH-sensitive hydrogels based on poly(methacrylic acid) (PMAA) using a new green initiation system involving vitamin C and hydrogen peroxide (VC/H2O2). The proposed initiation system offers advantages such as cost-effectiveness and eco-friendliness, and can be carried out under ambient conditions. The obtained PMAA hydrogels are characterized using various techniques, and their potential for encapsulation and controlled release of antioxidant phenolic compounds is investigated. The study demonstrates that the controlled release of phenolic compounds can enhance their bioavailability and therapeutic effects.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Vesna V. Panic, Jelena D. Jovanovic, Ivanka G. Popovic, Sanja I. Savic, Maja D. Markovic, Pavle M. Spasojevic, Borivoj K. Adnadjevic
Summary: High concentrations of hydrophobic MFI zeolite were successfully embedded in poly(meth-acrylic acid) network, resulting in the synthesis of PMAA-MFI composite hydrogels. The effects of zeolite concentration on various properties of the composite hydrogels were investigated, including structural parameters, morphological properties, water swelling ability, thermal degradation mechanism and stability, and mechanical properties. The composites exhibited improved density, crosslinking density, mechanics, and lower swelling degree compared to pure PMAA gel, while maintaining a porous structure with uniformly dispersed zeolite particles. The correlations between composition and properties were established, allowing for tailored design of PMAA-MFI composite hydrogels for specific applications.
Review
Chemistry, Multidisciplinary
Andreia F. Sousa, Rafael Patricio, Zoi Terzopoulou, Dimitrios N. Bikiaris, Tobias Stern, Julia Wenger, Katja Loos, Nadia Lotti, Valentina Siracusa, Anna Szymczyk, Sandra Paszkiewicz, Konstantinos S. Triantafyllidis, Alexandra Zamboulis, Marija S. Nikolic, Pavle Spasojevic, Shanmugam Thiyagarajan, Daan S. van Es, Nathanael Guigo
Summary: This review focuses on the importance of replacing the polymer resin PET, discussing various potential PET alternatives from biomass such as bio-PET, PEF, and PTF. While these biobased polymers may play a significant role in various applications in the future, their cost competitiveness remains a major obstacle to wider deployment. Social, political, and legal frameworks, along with supportive financial schemes, are driving rapid changes in the development and adoption of these renewable alternatives.
