Results 41 to 50 of about 3,997,963 (398)

Chirality analysis of helical polymers

open access: yesChemistry Teacher International, 2020
Optically active macromolecules, having a preferred- or single-handed helical conformation, play important roles in polymeric materials and in life. This article presents how helical polymers can be assessed from a view of chirality.
Nakano Tamaki   +2 more
doaj   +1 more source

Decomposition rate and biochemical fate of carbon from natural polymers and microplastics in boreal lakes

open access: yesFrontiers in Microbiology, 2022
Microbial mineralization of organic compounds is essential for carbon recycling in food webs. Microbes can decompose terrestrial recalcitrant and semi-recalcitrant polymers such as lignin and cellulose, which are precursors for humus formation.
Jussi S. Vesamäki   +5 more
doaj   +1 more source

Low-density PMMA/MAM nanocellular polymers using low MAM contents: Production and characterization [PDF]

open access: yes, 2019
Low-density nanocellular polymers are required to take advantage of the full potential of these materials as high efficient thermal insulators. However, their production is still a challenging task.
Athanassiou, Athanassia   +5 more
core   +1 more source

Thermal and Structure Analysis Based on Exfoliation of Clay in Thermosensitive Polymer by in-situ Polymerization

open access: yesIndonesian Journal of Chemistry, 2019
Poly(N-vinylcaprolactam) (PNVCL) offers superior characteristics as a thermoresponsive polymer for various potential applications. An attractive procedure, namely in-situ polymerization, was used to prepare NVCL/clay nanocomposite in different clay ...
Marwah Noori Mohammed   +2 more
doaj   +1 more source

Digital Light Processing of 2D Lattice Composites for Tunable Self‐Sensing and Mechanical Performance

open access: yesAdvanced Engineering Materials, EarlyView., 2023
The study presents the mechanical and in situ sensing performance of digital light processing‐enabled 2D lattice nanocomposites under monotonic tensile and repeated cyclic loading, and provides guidelines for the design of architectures suitable for strain sensors and smart lightweight structures.
Omar Waqas Saadi   +3 more
wiley   +1 more source

Enzymatic Platforms for Sensitive Neurotransmitter Detection

open access: yesSensors, 2020
A convenient electrochemical sensing pathway was investigated for neurotransmitter detection based on newly synthesized silole derivatives and laccase/horseradish-peroxidase-modified platinum (Pt)/gold (Au) electrodes.
Sylwia Baluta   +4 more
doaj   +1 more source

Effect of polymer-polymer interactions on the surface tension of colloid-polymer mixtures [PDF]

open access: yes, 2003
The density profile and surface tension for the interface of phase-separated colloid-polymer mixtures have been studied in the framework of the square gradient approximation for both ideal and interacting polymers in good solvent. The calculations show that in the presence of polymer-polymer excluded volume interactions the interfaces have lower widths
arxiv   +1 more source

Representing Polymers as Periodic Graphs with Learned Descriptors for Accurate Polymer Property Predictions [PDF]

open access: yesarXiv, 2022
One of the grand challenges of utilizing machine learning for the discovery of innovative new polymers lies in the difficulty of accurately representing the complex structures of polymeric materials. Although a wide array of hand-designed polymer representations have been explored, there has yet to be an ideal solution for how to capture the ...
arxiv  

Coarse-graining polymers as soft colloids [PDF]

open access: yesPhysica A 306, 251 (2002), 2001
We show how to coarse grain polymers in a good solvent as single particles, interacting with density-independent or density-dependent interactions. These interactions can be between the centres of mass, the mid-points or end-points of the polymers. We also show how to extend these methods to polymers in poor solvents and mixtures of polymers.
arxiv   +1 more source

A Variational Beam Model for Failure of Cellular and Truss‐Based Architected Materials

open access: yesAdvanced Engineering Materials, EarlyView., 2023
Herein, a versatile and efficient beam modeling framework is developed to predict the nonlinear response and failure of cellular, truss‐based, and woven architected materials. It enables the exploration of their design space and the optimization of their mechanical behavior in the nonlinear regime. A variational formulation of a beam model is presented
Konstantinos Karapiperis   +3 more
wiley   +1 more source

Home - About - Disclaimer - Privacy