Results 71 to 80 of about 3,671 (259)

Preparing oxidizer coated metal fuel particles [PDF]

open access: yes, 1974
A solid propellant composition of improved efficiency is described which includes an oxidizer containing ammonium perchlorate, and a powered metal fuel, preferably aluminum or beryllium, in the form of a composite.
Shafer, J. I., Simmons, G. M.
core   +1 more source

Carbon‐based materials from renewable sources: Challenges and perspectives with a focus on green coconut

open access: yesJournal of Chemical Technology &Biotechnology, Volume 101, Issue 3, Page 477-493, March 2026.
Abstract This article presents a comprehensive examination of agricultural production, biomass generation, and its transformation into biochar, with a particular emphasis on green coconut waste as a primary resource. It underscores the link between agriculture and substantial biomass output, shedding light on the ecological issues associated with solid
Yslaine Andrade de Almeida   +4 more
wiley   +1 more source

Biodegradation Behavior of Neat PLA Fibers Under Controlled Industrial Composting Conditions: Fiber Characterization and Physical Changes During the Composting Process

open access: yesJournal of Applied Polymer Science, Volume 143, Issue 8, February 20, 2026.
Poly(lactic) acid (PLA) biodegradability in fiber form is relatively unexplored. This study shows that the drawing of the fibers during production affects the mechanical properties but slows down the biodegradation of the PLA. Biodegraded undrawn fibers showed peeling whereas drawn fibers showed crack formation on the surface.
Jose Alejandro Fernandez   +2 more
wiley   +1 more source

Geometric Optimization and Mechanical Performance Enhancement of Auxetic Structures for High‐Impact Applications Through Fused Deposition Modeling

open access: yesAdvanced Engineering Materials, Volume 28, Issue 3, 4 February 2026.
This study explores the mechanical performance of three auxetic structures, identifying a re‐entrant‐star hybrid as the most effective for impact absorption. Finite element simulations and experiments demonstrate significant gains in energy absorption and flexural strength after geometric optimization. This study investigates the mechanical performance
Malik Hassan   +4 more
wiley   +1 more source

Studio della propagazione della frattura in polibutene per tubi [PDF]

open access: yes, 2007
Il Polibutene-1 isotattico (i-PB1) è un materiale polimerico usato per la produzione di tubi per il trasporto di fluidi in pressione. In questo lavoro si sono studiati due tipi di i-PB1 prodotti da Basell che differiscono per grado di isotatticità.
L. Andena, M. Rink, R. Frassine
core   +1 more source

A biodegradable polylactic acid–polybutylene adipate terephthalate–starch polymer blend for geotextile applications

open access: yesPolymer International, Volume 75, Issue 2, Page 111-120, February 2026.
Biodegradable polymer blends are environmentally friendly materials with the ability to tailor material properties according to requirements. Abstract Geotextiles are typically used to stabilize steep earthen structures to prevent landslides. Usually, such geotextiles are made from petrol‐based polymers (such as polypropylene), but the use of ...
Michael Cordin   +5 more
wiley   +1 more source

Fractionated and Confined Crystallization of Polybutene-1 in Immiscible Polypropylene/Polybutene-1 Blends

open access: yesChinese Journal of Polymer Science, 2018
In this work, the crystallization of immiscible polypropylene (PP)/polybutene-1 (PB) blends, in particular the effect of crystal morphology of PP (HTC, high Tm component) on the subsequent crystallization behavior of PB (LTC, low Tm component) was studied.
Yao Xu   +3 more
openaire   +2 more sources

Crystal structures and polymorphism of polymers: Influence of defects and disorder [PDF]

open access: yes, 2018
The crystal structures and the polymorphism of polymers are described on the basis of the main principles that define the conformation of polymer chains in the crystalline state and the modes of packing of macromolecules.
Auriemma, Finizia   +3 more
core   +1 more source

The Role of Soil Microorganisms in Microplastic Biodegradation: Mechanisms, Carbon Preferences, and Ecological Impacts

open access: yesEnvironmental Microbiology Reports, Volume 18, Issue 1, February 2026.
This work explores the complex relationship between soil carbon availability and microplastic biodegradation, highlighting competition and symbiosis among microorganisms, the repurposing of microplastic‐derived polymers, and the impact of soil organic carbon on microbial substrate preferences and carbon use efficiency variability.
Mohammad Yaghoubi Khanghahi   +3 more
wiley   +1 more source

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