Results 31 to 40 of about 23,424,289 (221)

Accelerated crystallization and crystal-crystal transition of PB induced by PP with optimized content

open access: yesPolymer Testing, 2023
Isotactic polybutene-1 (PB)/isotactic polypropylene (PP) blends, typical crystalline/crystalline polymer blends with low-melting-temperature (Tm) PB and high-Tm PP, exhibit complicated interactions between their components in both molten and solid states.
Xiangjie Yan   +5 more
doaj  

EPR Spectroscopy Investigation of Cu2+ Ions Adsorbed in Tannin-Formaldehyde Resins of Mimosa (Acacia mearnsii) Bark Extracts

open access: yesJournal of Spectroscopy, 2015
The chemical environment of Cu2+ ions adsorbed in tannin-formaldehyde resins of Acacia mearnsii bark extracts, prepared from polybutene, is investigated by EPR spectroscopy at 300 K. The spectrum is simulated considering two isolated axial Cu(II) species
Marcelo H. Herbst, Ney V. Vugman
doaj   +1 more source

Dimensionless Investigations on Energy Conversion and Analysis of Interlayer Time in Laser‐Based Powder Bed Fusion of Polymers for Polyamide 12 with Nanoadditives and Polypropylene

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores the energy conversion in powder bed fusion of polymers using laser beam for polyamide 12 and polypropylene powders. It combines material and process data, using dimensionless parameters and numerical models, to enable the prediction of suitable printing parameters.
Christian Schlör   +9 more
wiley   +1 more source

Design and Evaluation of 3D‐Printed Polylactic Acid Composites Reinforced with Biodegradable Bamboo Powder and Jute Powder

open access: yesAdvanced Engineering Materials, EarlyView.
The study investigates 3D‐printed polylactic acid (PLA) composites with biodegradable bamboo and jute powder fillers. Mechanical, thermal, structural properties, and rheological behavior are discussed to evaluate composite performance. Morphological characterization indicates uniform dispersion and adhesion of the fillers in the PLA matrix with the ...
Vimukthi Dananjaya   +3 more
wiley   +1 more source

Sustainable 4D Printed Meta Biocomposite Materials for Programmable Structural Shape Changing

open access: yesAdvanced Materials, EarlyView.
In this work, the architecture of a plant fiber cell wall is simplified to design novel concepts of 4D printed tubular moisture‐driven structural actuators, using the hygromorphic properties of continuous flax fiber (cFF) reinforced materials named meta biocomposites.
Melvin Josselin   +4 more
wiley   +1 more source

Plastics of the Future? Interdisciplinary Review on Biobased and Biodegradable Polymers: Progress in Chemistry, Societal Views, and Environmental Implications

open access: yesAngewandte Chemie International Edition, Accepted Article.
Global demand to reduce polymer waste and microplastics pollution has increased in recent years, prompting further research, development, and wider use of biodegradable and biobased polymers (BBPs). BBPs have emerged as promising alternatives to conventional plastics, with the potential to mitigate the environmental burdens of persistent plastic waste.
Sara T. R. Velasquez   +5 more
wiley   +1 more source

Imino‐Pyrrole Zn(II) Complexes for the Rapid and Selective Chemical Recycling of Commodity Polymers

open access: yesAngewandte Chemie International Edition, Accepted Article.
Three imino‐pyrrole zinc complexes were prepared and applied to the rapid degradation of PLA and the depolymerisation of BPA‐PC and PET. PLA alcoholysis proceeded rapidly at a range of conditions, including reflux in air. Remarkable activity was demonstrated for the solvent‐free methanolysis of PLA at mild conditions with full conversion reached in 11 ...
Jack A. Stewart   +5 more
wiley   +1 more source

Bioelectronics with Topological Crosslinked Networks for Tactile Perception

open access: yesAdvanced Physics Research, EarlyView.
The recent advances in 3 different topological crosslinked networks are summarized, focusing on their assembly methods, structural characteristics, and device performance decoupling. Also, the ionic and electronic transport mechanisms, which provide insights into ionic‐electronic coupling, are elaborated.
Mingqi Ding, Pengshan Xie, Johnny C. Ho
wiley   +1 more source

Nanofiber‐based polymer electrolyte membranes for fuel cells

open access: yesCarbon Energy, EarlyView.
Recent advances in electrospun nanofibers and natural nanofibers for fuel cell polyelectrolyte membranes are systematically summarized. Both advantages and disadvantages of nanofiber‐based polyelectrolyte membranes are also highlighted in improving the performance of fuel cells (PEMFCs and AEMFCs) and practical applications.
Ning Liu   +7 more
wiley   +1 more source

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