Article
Chemistry, Multidisciplinary
Serap Kavlak
Summary: Functional amide-based copolymer/clay nanocomposites were synthesized by in situ interlamellar copolymerization, showing improved thermal stability and resistance to thermal degradation, indicating potential as new high-performance nanomaterials.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Pharmacology & Pharmacy
Ritabrita Goswami, Victor Lehot, Yagiz Anil cicek, Harini Nagaraj, Taewon Jeon, Terry Nguyen, Stefano Fedeli, Vincent M. Rotello
Summary: Current strategies for intracellular protein delivery face challenges of endosomal entrapment and degradation. This study presents a simple approach of protein modification using citraconic anhydride to impart an overall negative charge, enabling assembly with positively charged nano vectors. Anhydride-modified proteins were electrostatically assembled with a cationic guanidinium-functionalized polymer, demonstrating efficient cytosolic protein delivery. The platform retained protein function and effectively killed cells through intracellular enzymatic activity.
Article
Nanoscience & Nanotechnology
Min Su Yim, Yeon Sil Hwang, Jeong Kyu Bang, Dae-Woong Jung, Jun Min Kim, Gi-Ra Yi, Gaehang Lee, Eun Kyoung Ryu
Summary: The study successfully synthesized DOX-AuNP with excellent biocompatibility and potential for tumor treatment, and utilized PET for tumor diagnosis. By releasing DOX in cancer cells and aggregating AuNPs via electrostatic attraction, DOX-AuNP showed high uptake in HeLa cancer cells and PET tumor images in cancer mouse models.
NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE
(2021)
Article
Polymer Science
Hans R. Kricheldorf, Steffen M. Weidner
Summary: The research showed that 2,2'-dihydroxybiphenyl is the most successful cocatalyst for bismuth subsalicylate in ring-opening polymerization of l-lactide, and optimization of reaction time and temperature is crucial for achieving high weight average molecular weights. Additionally, some unusual transesterification reactions were discovered, and triphenylphosphine was found to be an effective catalyst poison.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
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
Engineering, Environmental
Hongjie Zhang, Qiao Zhang, Qiuquan Cai, Qiaojie Luo, Xiaojun Li, Xiaodong Li, Kai Zhang, Weipu Zhu
Summary: Aliphatic polyesters are widely used in biomedicine due to their biodegradability, biocompatibility, and controllable mechanical properties. Polycondensation is a versatile method for their synthesis, but traditional catalysts may have biotoxicity issues. Magnesium compounds were used as catalysts for polycondensation, resulting in bioactive polyesters with osteogenic and anti-inflammatory properties. The bioactive polyester showed higher bone regeneration than commercial PLA film in guided tissue regeneration, indicating promising applications in the biomaterial field.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Polymer Science
Douglas R. Hayden, Alwin Papegaaij, Bart Reuvers, Paul Buijsen, Cor Koning
Summary: New, highly rigid bio-based building blocks were synthesized from renewable raw materials by reacting an imide made from citraconic anhydride and glycine with sorbic acid. These renewable building blocks were incorporated into alkyd resins and evaluated as white paints, showing promising properties that even outperform some standard commercial alkyd resins. To further enhance sustainability, turning these highly bio-based alkyd resins into stable aqueous emulsions is necessary.
POLYMER INTERNATIONAL
(2021)
Article
Polymer Science
Ang Shen, Jinggang Wang, Shugang Ma, Xuan Fei, Xiaoqin Zhang, Jin Zhu, Xiaoqing Liu
Summary: Polyesters with high T-g from renewable resources are crucial for expanding their application range. A series of copolyesters, PBSF, were synthesized from BHEPS, BDO, and FDCA, with increasing BHEPS content leading to higher T-g but lower M-w. PBSF-65 was identified as a promising polyester for various applications requiring high transparency and heat resistance, with specific properties suitable for baby bottles, children's toys, kitchen appliances, and beverage packaging.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Takayoshi Katoh, Yukiko Ogawa, Yoshihiro Ohta, Tsutomu Yokozawa
Summary: The ester-ester exchange reaction proved to be faster than the ester-alcohol exchange reaction, leading to the successful synthesis of high-molecular-weight polyesters under various conditions. The copolymerization of different compounds through ester-ester exchange also resulted in the formation of new copolymers with confirmation from C-13 NMR spectroscopy and DSC thermal analysis.
JOURNAL OF POLYMER SCIENCE
(2021)
Article
Polymer Science
Huining Ding, Xianmin Wu, Bing Han, Ning Liu, Binyuan Liu, Il Kim
Summary: Highly regioselective ring-opening copolymerizations of 5-norbornene-2,3-dicarboxylic anhydride (NA) and epoxide monomers have been achieved using Cr-III catalysts and specific ligands, allowing for the control of cis/trans regioselectivity in the resulting polyesters by adjusting feed ratio and monomer structure. The resulting polyesters from the copolymerization of NA and epichlorohydrin provide a robust platform for post-modification, with the ring-strained C=C double bonds in the norbornene units facilitating further functionalization through azide-alkene 1,3-dipolar cycloaddition reactions based on desired targets.
Article
Polymer Science
Mateus Hofmann, Mario Garrido, Marina Machado, Joao R. Correia, Joao C. Bordado
Summary: Research on biobased thermoset resins has been overlooked compared to biobased thermoplastics. This study developed low-molecular weight macromolecules with a high bio-content, suitable for various fiber-reinforced polymer production techniques. The resulting resins exhibited comparable mechanical and thermomechanical behavior to petrochemical-based counterparts, making them greener alternatives for high-performance structural applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Yue Ding, Shilin Li, Jingxi Wang, Yuanyuan Liu, Liming Dong, Xihua Du, Dan Huang, Tianhao Ai, Junhui Ji
Summary: This paper synthesized poly(butylene succinate-co-diethylene glycol succinate) (PBSD) copolymers to improve the nonenzymatic hydrolysis of poly(butylene succinate) (PBS). The results showed that the contact angle and water uptake of the copolymer increased significantly, indicating microphase separation occurred. PBSD copolymers exhibited high tensile strength, elongation at break, and decomposition temperature. The weight loss of PBSD copolymers was greater in acidic conditions compared to neutral conditions and simulated seawater. PBSD copolymers have the potential to be utilized as water degradable materials for environmental pollution control.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Applied
Kamal Aly, Hany M. Abd El-Lateef, Nasr Yehia, A. Khodairy, Marwa M. Sayed, Mahmoud Abd El Aleem Ali Ali El-Remaily
Summary: A novel series of unsaturated polyesters containing indazole moiety were successfully prepared using interfacial polycondensation technique, showing high thermal stability and different morphology structure. These polyesters demonstrated strong corrosion protection performance on X65-steel in sulfuric acid solution, acting as efficient inhibitors of mixed type corrosion.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Polymer Science
Zhoufeng Wang, Taoguo Ding, Junwei Hu, Bolin Wang, Yingying Liu, Guoxin Ding
Summary: A series of aromatic polyesters were prepared and investigated for their properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Georgina L. Gregory, Gregory S. Sulley, Joost Kimpel, Matylda Lagodzinska, Lisa Hafele, Leticia Pena Carrodeguas, Charlotte K. Williams
Summary: This study reports well-defined reprocessable poly(ester-b-carbonate-b-ester) elastomers with impressive physical properties and degradability. The superior performance of these elastomers is attributed to the highly entangled soft segments, fully reversible strain-induced crystallization, and precisely placed Zn-II-carboxylates dynamically crosslinking the hard domains.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
