Results 101 to 110 of about 3,024 (217)

Polycarbonate Vitrimers and Dynamic Co‐Networks From Epoxide/Carbon Dioxide Copolymerization

Macromolecular Rapid Communications, EarlyView.
This work demonstrates how CO2‐derived poly(propylene carbonate) and poly(cyclohexene carbonate) backbones influence vitrimer thermo‐mechanical behavior. By tuning backbone composition, epoxide crosslinker chemistry and blend ratios, the crosslinked materials span a wide property window, from highly extensible to stiff, glassy networks, establishing an
Satej S. Joshi, Sophia Aracri, Mark D. Foster, James M. Eagan   +3 more
wiley   +1 more source

Exploring the Reproductive Toxicity of Bisphenol S Through a Network Toxicology and Molecular Docking Analysis

Pediatric Discovery, EarlyView.
Utilizing network toxicology, molecular docking, and dynamic simulations to investigate the potential reproductive toxicity of bisphenol S (BPS). ABSTRACT The aim of this study was to investigate the potential reproductive toxicity of bisphenol S (BPS) and the related molecular mechanisms through a network toxicology approach.
Siyuan Wang, Yan Fu, Xu Huang, Qitong Guo, Xiangqin Zheng, Shengde Wu, Lianju Shen, Guanghui Wei   +7 more
wiley   +1 more source

Thermoresistive Sensors Based on Eco‐Friendly Carbon Dioxide‐Derived Polymeric Poly(Cyclohexene)carbonate Loaded With Reduced Graphene Oxide and Carbon Black

Polymer Engineering &Science, EarlyView.
Thermoresistive sensing materials derived from eco‐friendly polymers for broad‐range temperature measurements. ABSTRACT Carbon dioxide‐derived polycarbonates (CO2‐PCs) present a sustainable alternative to standard bisphenol A polycarbonates (BPA‐PCs), as they are synthesized from the reaction between epoxide and carbon dioxide (CO2). In fact, these eco‐
Ane Martín‐Ayerdi, Luis Rubio‐Peña, Nikola Peřinka, Sergio Merillas, Itziar Oyarzabal, José Luis Vilas‐Vilela, Pedro Costa, Senentxu Lanceros‐Méndez   +7 more
wiley   +1 more source

Extension of Isoconversional Analysis to Diffusion‐Controlled Epoxy Cure Kinetics: Comparison With Model‐Fitting Approaches

Polymer Engineering &Science, EarlyView.
Extending isoconversional analysis of DSC data to diffusion‐controlled regimes captures the rise in apparent activation energy upon vitrification and yields TTT diagrams of RTM6 epoxy resin that remain accurate when diffusion, rather than chemistry, governs the cure rate.
Didina‐Ramona‐Casandra Cârstea, Sihem Zaidi, Daniel Sanchez‐Rodriguez, Jordi Farjas, Andrei Rotaru, Josep Costa   +5 more
wiley   +1 more source

Viscoelastic Modeling of Stress Relaxation in Model High‐Performance Covalent Adaptable Networks

Journal of Polymer Science, EarlyView.
Covalent adaptable networks, often referred to as vitrimers, contain a certain fraction of bonds that are able to exchange with other bonds. The ability of this bond exchange to relax stress or result in flow of the material depends on the concentration and specific concentration of these bonds in ways that can be quantified.
Broderick Lewis, Benjamin R. Hafner, Cheol Park, Joseph M. Dennis, Kenneth R. Shull   +4 more
wiley   +1 more source

Comparison of Calorimetry and NMR Relaxometry Measurements of Epoxy Cure Kinetics

Journal of Polymer Science, EarlyView.
Single‐sided NMR monitors epoxy cure in three DGEBA/diamine systems, alongside benchmark DSC measurements. Fitting both datasets to a Kamal‐Malkin kinetic model shows NMR‐derived rate constants typically exceed DSC values, revealing an offset between gelation and chemical conversion.
Olivia Cassara, Kayla Copeman, Sydney Joyce Tate, Jack Ballenger, Tyler Meldrum   +4 more
wiley   +1 more source

Chemical Recycling as a Tool for Enabling a Second Life for Polyesters

SusMat, EarlyView.
This review presents the elucidation of the life cycle of main polyesters, detailing end‐of‐life methods, with focus of solvolysis technologies, then an analysis of LCA and TEA on literature data, an original data analytic, and, finally, a current industrial mapping of the main processes with a critical perspective on the plastic life‐cycle ecosystem ...
Nícolas Soares Urruth, Cristian de Oliveira Romera, Caio Gomide Otoni, Bruno Francisco Oechsler, Pedro Henrique Hermes de Araújo, Claudia Sayer   +5 more
wiley   +1 more source

Comprehensive Evaluation of Bisphenol A Toxicity Reveals Neurobehavioral, Metabolic, and Reproductive Impairments in Girardia tigrina

Environmental Toxicology, EarlyView.
ABSTRACT Bisphenol A (BPA), a common industrial chemical used in plastics and consumer products, is increasingly detected in aquatic environments, raising serious concerns about its potential ecological impacts. This study evaluated the sublethal and acute toxic effects of BPA on the freshwater planarian Girardia tigrina, a recognized model for ...
Raquel de Jesus Selestrino, Felipe Schaly, Welligton Luciano Braguini   +2 more
wiley   +1 more source

Internal Bisphenol Analogue Exposure in an Elderly Chinese Population: Knowledge from Dietary Exposure

Toxics
Due to its endocrine-disrupting effects and neurotoxicity, Bisphenol A (BPA) has been banned from some products and some countries; therefore, alternatives are increasingly being used.
Xinjie Duan, Mengyuan Liang, Beibei Wei, Jie Gu, Qian Zhao, Guixiang Ji, Shengyang Jin, Huanhuan Chen   +7 more
doaj   +1 more source

Bisphenols and Phthalates in Bottled Mineral Water: First Evidence of Co‐Occurrence, Estrogenic Activity, and Health Risk in Brazil

Environmental Toxicology, EarlyView.
ABSTRACT Bisphenol A (BPA), its structural analogs, and phthalates are synthetic chemicals widely used, with documented endocrine‐disrupting activity. This study aimed to develop and validate a selective multiresidue analytical method for the simultaneous determination of BPA, 10 bisphenol analogs, and six phthalates in PET‐bottled mineral water.
Giulia Boito Reyes, Lucas Correia Gonçalves, Fernanda Cristina Iba Molinari, José Eduardo Gonçalves   +3 more
wiley   +1 more source