Article
Polymer Science
I Zaborniak, P. Chmielarz
Summary: Radical polymerization techniques utilizing naturally occurring substances, such as riboflavin, are being rapidly developed towards more sustainable and environmentally friendly approaches. Riboflavin's unique structure and biological activity make it an excellent target for radical polymerization, with its versatile properties that allow for easy modification to incorporate additional functional groups. Recent advances in utilizing riboflavin structure to mediate free radical polymerization and controlled polymerization techniques offer environmentally friendly and easily scalable methods for the preparation of functional polymer materials with diverse applications.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Polymer Science
Iris Lamparth, David Wottawa, Jorg Angermann, Pascal Fassler, Robert Liska, Yohann Catel
Summary: This study investigated the effects of four new urethane-based AFCT agents on dental composites, which can improve mechanical properties and reduce shrinkage force, providing effective technological support for the formulation of low-shrinkage materials.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Polymer Science
Henry Foster, Martina H. Stenzel, Robert Chapman
Summary: Compared to conventional techniques, photoinitiated electron/energy transfer-reversible addition-fragmentation chain transfer (PET-RAFT) allows for better control over the polymerization of multiblock star copolymers, avoiding the generation of termination products. This technique is also tolerant to oxygen, enabling the automated synthesis of multiblock star copolymers at short block lengths, providing a useful approach for screening the effect of polymer composition on solution structure.
Article
Polymer Science
Esra Duygu Aracier, Oya Aydin Urucu, Emrah Cakmakci
Summary: The study aimed to prepare an efficient adsorbent for toxic dye removal, which can be reused multiple times and fits the Langmuir adsorption model.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Tadashi Kanbara, Mizuki Arase, Miyu Tanaka, Airi Yamaguchi, Koto Tagami, Tomoko Yajima
Summary: In this study, synthesis methods for fluorine-containing polymers were developed using photoirradiation halogen bonding. Sequential polymerization resulted in fluoroalkyl-alkyl-alternating polymers, while chain polymerization produced polymers with perfluoroalkyl terminals. Block polymers were also synthesized through successive chain polymerization.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Polymer Science
Arwa Almusa, Antonio H. S. Delgado, Paul Ashley, Anne M. Young
Summary: The aim of this study was to develop a rapid method for determining the chemical composition, solvent evaporation rates, and polymerization kinetics of dental adhesives. Different adhesives showed significant differences in filler content, monomers, solvents, and polymerization extent, which is important for understanding their properties.
Article
Materials Science, Multidisciplinary
Eletria Biswas, Julio Antonio Conti Silva, Mujibur Khan, Rafael Lopes Quirino
Summary: Natural and renewable polymers have been considered as alternatives to petroleum-based plastics due to environmental concerns. However, some of these polymers exhibit poor mechanical properties. In this study, composites based on tung and linseed oil resins were prepared using starch as reinforcement. The addition of starch increased the room temperature storage modulus of the composites.
Article
Polymer Science
Wiktoria Tomal, Dominika Krok, Anna Chachaj-Brekiesz, Joanna Ortyl
Summary: New meta- and para-cyanoderivatives of 1,4-di(styryl)benzene and 1,3-di(styryl)benzene were synthesized and investigated as photosensitizers in various photopolymerization processes with iodonium salt. Experimental confirmation of initiation mechanism and detailed spectroscopic analysis were performed. Real-time FTIR testing showed high efficiency of the proposed cyanoderivatives in photopolymerization, with additional applications including 3D printing, fiber-reinforced composites, and MWCNTs nanocomposites.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Peng Sun, Yuquan Li, Bo Qin, Jiang-Fei Xu, Xi Zhang
Summary: A novel hot melt adhesive SEA with super high adhesion strength and excellent multiple reusability has been developed. SEA exhibits the highest adhesion strength in bonding stainless steel and retains over 80% of the original adhesion strength even after six times of reuse.
ACS MATERIALS LETTERS
(2021)
Article
Polymer Science
Monika Topa-Skwarczynska, Filip Petko, Dominika Krok, Mariusz Galek, Joanna Ortyl
Summary: This study introduces five completely new iodonium derivatives of biphenyl-based iodonium salts, differentiated by the push-pull structure of chromophores determined by the positions of methoxy and trisilyl groups in the biphenyl rings. The influence of the methoxy grouping in the biphenyl ring on the push-pull effect was explained, and their spectroscopic and electrochemical properties were determined. For the first time, the possibility of using these compounds as high-performance initiators of cationic and radical polymerization was presented and described. New two-component initiator systems composed of iodonium salts and thiadiazole derivatives for preparing new-generation dental composites have also been proposed. The thiadiazole derivative was a very effective alternative to camphorquinone, commonly used in the dental industry. Completely new organic matrix compositions and a new curing mechanism have also been proposed by introducing monomers that polymerize according to radical and cationic mechanisms. As a result, dental composites with significantly reduced polymerization shrinkage compared to commercially available materials were obtained. Finally, a new photoinitiating system we have developed makes it possible to obtain new composites that are an exciting alternative to materials currently used in dentistry.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Loic Buchon, Jean-Michel Becht, Laurent Rubatat, Wei Wang, Hua Wei, Pu Xiao, Jacques Lalevee
Summary: This research synthesized and characterized four potential phosphine oxide photoinitiators and evaluated their efficiency in photopolymerization at 405 nm wavelength. Two of the obtained photoinitiators showed better performance than the widely used commercial photoinitiator. Additionally, one of the synthesized photoinitiators was successfully used in 3D printing of thermoplastics and exhibited lower cytotoxicity compared to the benchmark structure.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
You-Chi Mason Wu, Gloria Chyr, Hyunchang Park, Anna Makar-Limanov, Yuran Shi, Joseph M. Desimone, Zhenan Bao
Summary: This study reports a modular system for the production of degradable and recyclable thermosets via photopolymerization. The system utilizes a polyurethane backbone to impart strong mechanical properties to the plastic, while the use of hemiacetal ester linkages allows for easy degradation. Functional polyurethane diol can be regenerated through a simple purification process.
Review
Polymer Science
Zhuoqun Wang, Antoine Debuigne
Summary: Synthetic polymers have a wide range of applications, but there is still a need for improvement and functionalization. The radical polymerization of exo-methylene heterocyclic compounds (MHCs) offers more possibilities compared to acyclic vinyl monomers. Recent advancements in the radical polymerization of MHCs and the various macromolecular structures and applications it provides are discussed. The limitations and future prospects of MHCs as well as the development of bio-based MHCs are also highlighted.
Review
Polymer Science
Evangelia C. Vouvoudi
Summary: This review article summarizes the synthesis, properties, and characteristics of flowable dental polymeric materials, and provides perspectives on material optimization and comments on radiopacity and translucency.
Article
Dentistry, Oral Surgery & Medicine
Benjamin Grob, Michael Simonis, Robert Liska, Yohann Catel
Summary: The potential of ethyl-2-(tosylmethyl)acrylate (ASEE) as a chain transfer agent for low-shrinkage dental composites is evaluated. It is found that by using specific photoinitiator systems, composites containing ASEE can be formulated with excellent mechanical properties, high double bond conversion, good network homogeneity, and low shrinkage force. Additionally, the incorporation of suitable photoinitiator systems does not affect the ambient light working time of the uncured composites.
