Article
Polymer Science
Helena Oliver-Ortega, Shiyu Geng, Francesc Xavier Espinach, Kristiina Oksman, Fabiola Vilaseca
Summary: The study focused on utilizing bacterial cellulose from kombucha tea fermentation as a reinforcing nanofiber network in PMMA matrix, leading to the creation of lightweight, porous nanocomposites with excellent mechanical properties. The nanofibrils in the KBC network had diameters ranging between 20-40 nm and exhibited high crystallinity (>90%). The prepared nanocomposites showed uniform structure, high stiffness, and were homogeneously impregnated with the PMMA matrix, demonstrating the potential of KBC as a template for polymer nanocomposites.
Article
Polymer Science
Amir Saeid Pakdel, Elina Niinivaara, Emily D. Cranston, Richard M. Berry, Marc A. Dube
Summary: Cellulose nanocrystals (CNCs) with different surface properties were incorporated into emulsion-based pressure-sensitive adhesives (PSAs) to modify their properties. CNCs with higher hydrophilicity and surface charge showed less association with latex particles and resulted in nanocomposites with lower strain-softening behavior and improved PSA properties.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Chuanwei Miao, Michelle Zhao, Wadood Y. Hamad
Summary: In this study, a new and facile method for preparing CNC/polymer nanocomposite latices via surfactant-free emulsion polymerization was reported. The distribution of CNCs in the latex particles could be controlled by adjusting the reaction procedures, resulting in improved mechanical properties of the nanocomposite latices. Unlike typical Pickering emulsion polymerization, this process does not require intense mechanical shearing and offers a scalable approach for preparing stable CNC/polymer nanocomposite latices that can be used in various applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Thermodynamics
Lina Dayse Alcantara Rodrigues, Lilia Muller Guerrini, Mauricio Pinheiro de Oliveira
Summary: The study found that with an increase in the content of cationic cassava starch (CCS), the grafting percentage of the polymer film decreased, and the thermal and mechanical properties showed a direct relationship with the CCS content and grafting percentage. Higher grafting percentage improved thermal stability but reduced elongation at break.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Polymer Science
Josue A. Torres-Avalos, Leonardo R. Cajero-Zul, Milton Vazquez-Lepe, Fernando A. Lopez-Dellamary, Antonio Martinez-Richa, Karla A. Barrera-Rivera, Francisco Lopez-Serrano, Sergio M. Nuno-Donlucas
Summary: The study focused on the synthesis of polymer nanocomposites with functionalized carbon nanotubes through in situ emulsion polymerization. Characterization techniques such as FT-IR and Raman spectroscopies were used to investigate the chemical structure and drug release capability. The release profile of hydrocortisone in some nanocomposites was found to be influenced by a change in hydrogen bond balance.
Article
Materials Science, Composites
Yinan Sun, Xiangchi Liu, Tingting Liu, Baijun Liu, Mingyao Zhang
Summary: Polyacrylate latexes with uniform particle size and excellent dispersion were successfully synthesized via emulsion copolymerization. The effect of grafting agent type on the residual double bonds of the seed latex was investigated. The PVC/ACR blend prepared by emulsion grafting polymerization reached a brittle-toughness transition at an ACR content of 8 phr, and showed significantly improved impact strength compared to traditional ACR-prepared PVC/ACR blend.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Shuo Li, Ruchira Colaco, Anne Staubitz
Summary: Diazocine-functionalized initiators were synthesized for controlled radical polymerizations, and their efficiency in polymerizations of methyl acrylate and methacrylate was tested. The initiation of the reactions required high amounts of reducing agents and catalysts. Additionally, violet light irradiation during the reactions caused retardation or termination of the anilide compound.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Engineering, Chemical
Vida A. Gabriel, Pascale Champagne, Michael F. Cunningham, Marc A. Dube
Summary: Nanocellulosic materials can be used as green materials for property modification in latex polymers, especially cellulose nanocrystals. It was found that the nanocrystals are sensitive to the ionic strength of the aqueous phase in latexes. By adjusting the surfactant-initiator systems, it is possible to successfully incorporate nanocrystals in-situ in emulsion polymerization for stable latex production.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Polymer Science
Hyun Jin Kim, Fumi Ishizuka, Rhiannon P. Kuchel, Shunsuke Chatani, Hiroshi Niino, Per B. Zetterlund
Summary: The synthesis of high-strength and tough polymer nanocomposites has attracted significant interest for industrial applications. In this study, the authors successfully synthesized polymer nanocomposites reinforced with nanodimensional polymeric worms using a simple and environmentally friendly synthesis process. The results showed that the cross-linking of the core-segments significantly influenced the reinforcement efficiency. This research expands the understanding of using PISA-derived worms as reinforcing fillers.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Polymer Science
Sujey G. Castellanos, V. Vladimir A. Fernandez-Escamilla, Miguel A. Corona-Rivera, Karla J. Gonzalez-Iniguez, Arturo Barrera, Francisco J. Moscoso-Sanchez, Edgar B. Figueroa-Ochoa, Israel Ceja, Martin Rabelero, Jacobo Aguilar
Summary: Coagulative nucleation in the copolymerization of methyl methacrylate-butyl acrylate (MMA-BA) is reported under monomer-starved conditions in latexes with high solid content and low surfactant concentrations. The use of semicontinuous emulsion heterophase polymerization (SEHP) allows the synthesis of latex with high colloidal stability. The study investigates the particle size, surfactant coverage area, particle coagulation rate, and other parameters during the copolymerization process.
Article
Acoustics
K. A. Cherednichenko, A. R. Sayfutdinova, A. Kraynov, B. Anikushin, V. Ignatiev, M. I. Rubtsova, S. A. Konstantinova, D. G. Shchukin, V. A. Vinokurov
Summary: A new method for the synthesis of nanofibrillar cellulose/polystyrene composite is proposed, which involves ultrasonic treatment of styrene emulsion in cellulose-water solution. This method eliminates the need for additional heating and significantly reduces the synthesis time compared to previous methods. Comprehensive analysis indicates that the mechanical, physical, and biodegradable properties of the composite obtained by the ultrasonic method are comparable to those obtained by the conventional thermal method.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Polymer Science
Shoucun Zhang, Shengyan Wang, Yujing Bian, Min Xue, Shengwei Guo, Wenli Wu
Summary: In this study, methyl methacrylate/methacrylic acid copolymers were synthesized by precipitation copolymerization using AIBN as the initiator. The effects of pressure, initiation concentration, MA concentration, and water content on the synthesis were investigated. The results showed that the concentration of MA or AIBN greatly influenced the molecular weight, with a maximum of 213 kDa. The morphology of the samples exhibited certain degree of agglomeration, and most samples were obtained as free-flowing powder with numerous spherical bulges.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Hamza Mahmoud Aboelanin, Stepan Podzimek, Vladimir Spacek
Summary: This study focuses on the detailed characterization of the molecular structure and dilute solution properties of highly dense star-like polymers of poly(methyl methacrylate) and poly(n-butyl methacrylate). The comparison of refractive index increment with corresponding linear homopolymers was conducted. The prepared polymers were characterized using size exclusion chromatography, multi-angle light scattering detector, and online viscometer. The obtained data allowed for the determination of arm distribution, average number of arms per molecule, and molar mass dependency of the draining factor. The relation between the number of arms per molecule and molar mass was estimated and compared with true values.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Mahmood Yakdel, Gholam Hossein Zohuri, Seyed Mahmood Arabi, Pedram Hosseinpour
Summary: Improving water-based polymer's properties using silicon compounds has gained significant attention. In this study, a novel siloxane-based crosslink agent was synthesized and used for emulsion copolymerization of methyl methacrylate, butyl acrylate, and acrylic acid. The incorporation of the crosslinker led to increased particle size and decreased viscosity of the latexes, as well as improved electrostatic stability. The crosslinking agent also affected the decomposition temperature and residual weight fraction of the copolymer.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Polymer Science
Stanislaw Sosnowski, Ryszard Szymanski, Francesca Lorandi, Mateusz Olszewski, Julian Sobieski, Rongguan Yin, Michael R. Bockstaller, Krzysztof Matyjaszewski
Summary: Numerical simulations showed that statistical copolymers with 1:1 BA/MMA composition have the highest contribution of alternating sequences, while batch ATRP of a 1:1 BA/MMA mixture generates gradient copolymers with diminished fraction of alternating sequences. A method for preparing statistical BA/MMA copolymers with the highest fraction of alternating sequences through normal ATRP copolymerization with MMA feeding was proposed to maximize the amount of alternating sequences in the copolymers.
Article
Materials Science, Composites
Alexandra Ouzas, Elina Niinivaara, Emily D. Cranston, Marc A. Dube
POLYMER COMPOSITES
(2019)
Article
Polymer Science
Jaime C. Cazotti, Alexander T. Fritz, Omar Garcia-Valdez, Niels M. B. Smeets, Marc A. Dube, Michael F. Cunningham
MACROMOLECULAR RAPID COMMUNICATIONS
(2019)
Article
Engineering, Chemical
Vida A. Gabriel, Marc A. Dube
MACROMOLECULAR REACTION ENGINEERING
(2019)
Review
Engineering, Chemical
Zahra Dastjerdi, Emily D. Cranston, Richard Berry, Carole Fraschini, Marc A. Dube
MACROMOLECULAR REACTION ENGINEERING
(2019)
Article
Food Science & Technology
Shidan Cummings, Esther Trevino, Yujie Zhang, Michael Cunningham, Marc A. Dube
Article
Engineering, Chemical
Yujie Zhang, Michael F. Cunningham, Niels M. B. Smeets, Marc A. Dube
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
Review
Engineering, Chemical
Shidan Cummings, Yujie Zhang, Niels Smeets, Michael Cunningham, Marc A. Dube
Article
Engineering, Chemical
Javier A. Gomez-Reguera, Eduardo Vivaldo-Lima, Vida A. Gabriel, Marc A. Dube
Article
Engineering, Chemical
Alison J. Scott, Vida A. Gabriel, Marc A. Dube, Alexander Penlidis
Editorial Material
Engineering, Chemical
Tizazu Mekonnen, Marc A. Dube
Article
Engineering, Chemical
Yujie Zhang, Michael F. Cunningham, Marc A. Dube
MACROMOLECULAR REACTION ENGINEERING
(2020)
Article
Chemistry, Applied
Jaime C. Cazotti, Alexander T. Fritz, Omar Garcia-Valdez, Niels M. B. Smeets, Marc A. Dube, Michael F. Cunningham
CARBOHYDRATE POLYMERS
(2020)
Meeting Abstract
Chemistry, Multidisciplinary
Elina Niinivaara, Alexandra Ouzasi, Carole Fraschini, Richard Berry, Marc Dube, Emily Cranston
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Meeting Abstract
Chemistry, Multidisciplinary
Stephanie Kedzior, Zahra Dastjerdi, Alexandra Ouzas, Michael Kiriakou, Elina Niinivaara, Carole Fraschini, Richard Berry, Marc Dube, Emily Cranston
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Article
Engineering, Chemical
Anahita Nasiri, Jim Wearing, Marc A. Dube
