Results 1 to 10 of about 89,438 (264)

Synthesis and characterization of branched multiblock copolymers of polyhydroxybutyrate (PHB) autoxidized fatty acid and polymethylmethacrylate (PMMA) [PDF]

open access: yesScientific Reports
The branched multiblock copolymer based on fatty acid, methyl methacrylate and PHB was first time synthesized. Autoxidation is the reaction of unsaturated fatty acids with air oxygen leading to macroperoxide initiators. Poly (3-hydroxy butyrate), PHB, is
Baki Hazer   +2 more
doaj   +2 more sources

Physicochemical Characterization of Polyvinyl Pyrrolidone: A Tale of Two Polyvinyl Pyrrolidones [PDF]

open access: yesACS Omega, 2020
Of several samples of polyvinyl pyrrolidone (PVP) used to coat and stabilize freshly manufactured aqueous dispersions of silver nanoparticles, one batch gave anomalous results: the dispersion maintained continued stability, even on extensive dilution. Our efforts to understand this desirable feature concluded that the generally used spectral method of ...
Laura Karina Mireles   +4 more
openaire   +3 more sources

Biobased Poly(itaconic Acid-co-10-Hydroxyhexylitaconic Acid)s: Synthesis and Thermal Characterization

open access: yesMaterials, 2020
Renewable vinyl compounds itaconic acid (IA) and its derivative 10-hydroxyhexylitaconic acid (10-HHIA) are naturally produced by fungi from biomass. This provides the opportunity to develop new biobased polyvinyls from IA and 10-HHIA monomers.
Y. Aso   +8 more
semanticscholar   +1 more source

Synthesis and Characterization of Polyvinyl Alkyl Ester and Polyvinyl Alcohol Homopolymers and Blends of Polyvinyl Alkyl Esters

open access: yesJournal of Polymer and Biopolymer Physics Chemistry, 2021
Polyvinyl alkyl esters (PVAe) are a family of macromolecules in which the ester side chains (pendant groups) increase in molar mass and hydrophobicity and decrease in structural polarity as the number of carbons in the pendant group increases. These PVAe are commonly used in adhesives, industrial coatings, plasticizers, textile finishes, chewing gum ...
Ronald P. D’Amelia   +1 more
openaire   +1 more source

Accuracy of different impression materials in parallel and nonparallel implants

open access: yesDental Research Journal, 2015
Background: A precise impression is mandatory to obtain passive fit in implant-supported prostheses. The aim of this study was to compare the accuracy of three impression materials in both parallel and nonparallel implant positions.
Mahroo Vojdani   +2 more
doaj   +1 more source

Hydrogels: Properties and Applications in Biomedicine

open access: yesMolecules, 2022
Hydrogels are crosslinked polymer chains with three-dimensional (3D) network structures, which can absorb relatively large amounts of fluid. Because of the high water content, soft structure, and porosity of hydrogels, they closely resemble living ...
T. Ho   +8 more
semanticscholar   +1 more source

Self-Healing Liquid Metal Magnetic Hydrogels for Smart Feedback Sensors and High-Performance Electromagnetic Shielding

open access: yesNano-Micro Letters, 2023
Hydrogels exhibit potential applications in smart wearable devices because of their exceptional sensitivity to various external stimuli. However, their applications are limited by challenges in terms of issues in biocompatibility, custom shape, and self ...
Biao Zhao   +10 more
semanticscholar   +1 more source

Plastic waste and its management strategies for environmental sustainability

open access: yesCase Studies in Chemical and Environmental Engineering, 2021
The massive consumption of a wide range plastic products has generated a huge amount of plastic waste. There is a need to provide awareness of their uses and routine management as a part of our lifestyle. Nowadays, plastics are increasingly being used in
Niyitanga Evode   +4 more
semanticscholar   +1 more source

Microplastics affect sedimentary microbial communities and nitrogen cycling

open access: yesNature Communications, 2020
Microplastics are ubiquitous in estuarine, coastal, and deep sea sediments. The impacts of microplastics on sedimentary microbial ecosystems and biogeochemical carbon and nitrogen cycles, however, have not been well reported. To evaluate if microplastics
M. Seeley   +3 more
semanticscholar   +1 more source

Advances in wound dressing based on electrospinning nanofibers

open access: yesJournal of Applied Polymer Science, 2023
In recent years, there has been a significant focus on bioactive dressings suitable for treating chronic and acute wounds. Electrospinning nanofibers are considered advanced dressing options due to their high porosity and permeability to air and water ...
Xiaotong Zhang   +6 more
semanticscholar   +1 more source

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