Results 31 to 40 of about 888 (168)

Highly integrated, alignment healing, and full‐recyclable multifunctional flexible devices based on dynamic covalent bonds

Smart Molecules, EarlyView.
This study addresses stability, repair, and recycling in flexible devices using polymers with identical dynamic bonds but incompatible backbones. This enables robust integration, precise self‐healing, and full recyclability. We demonstrate optoelectronic sensors that, after damage, magnetically self‐assemble and heal upon heating.
Xianfei Cao, Yong Qi, Wenbin Niu, Bingtao Tang, Shufen Zhang   +4 more
wiley   +1 more source

AMMONIUM PERCHLORATE AND AMMONIUM PERCHLORATE- HYDROXYL TERMINATED POLYBUTADIENE SIMULATED COMBUSTION DOI 10.5028/jatm.2012.04014811

Journal of Aerospace Technology and Management, 2012
The combustion simulation of ammonium perchlorate was carried out with the software Chemkin, in two steps: the burning behavior of pure ammonium perchlorate and the one of formulated ammonium perchlorate with hydroxyl terminated polybutadiene binder.
Rene Francisco Boschi Gonçalves, Koshun Iha, Francisco Bolivar Correto Machado, José Atílio Fritz Fidel Rocco   +3 more
doaj  

Cloisite 15Aº nanoclay as an effective PTC for the epoxidation of hydroxyl terminated polybutadiene (HTPB)

Polímeros, 2014
A simple method is reported for the epoxidation of hydroxyl-terminated polybutadiene (HTPB) by using in-situ generated dimethyl dioxirane (DMD) as an oxidant and Cloisite 15Aº nanoclay as a phase-transfer catalyst (PTC).
Mir Mohammad Alavi Nikje, Maryam Gholi Nataj   +1 more
doaj   +1 more source

Synthesis and Characterization of an Azido Nitrofurazanyl Ether: An Energy‐Rich Heterocyclic Plasticizer With a Low Glass Transition Temperature

Propellants, Explosives, Pyrotechnics, Volume 51, Issue 8, Page 1365-1374, August 2026.
ABSTRACT We report on the synthesis and characterization of 3‐(2‐(2‐azidoethoxy)ethoxy)‐4‐nitro‐1,2,5‐oxadiazole (NFPEG2N3), which is a liquid nitrofurazanyl ether that was designed to be an energy‐rich plasticizer for glycidyl azide polymer (GAP)‐ and nitrocellulose (NC)‐based formulations.
P. Lieber, A. Omlor, U. Schaller, T. M. Klapötke   +3 more
wiley   +1 more source

Influence of Hydroxyl-Terminated Polybutadiene (HTPB) on the Mechanical and Electrical Properties of Epoxy Phenol Novolac Resin [PDF]

Mechanics of Advanced Composite Structures
Epoxy phenol novolac resin is among the most widely used matrix materials in the fabrication of composite structures. Incorporating elastomeric droplets into the matrix is one approach to enhancing the properties of composite materials.
Mahmoud Heydari, Komeil Pahlavani Bidgoli   +1 more
doaj   +1 more source

Design, Production and Evaluation of 3D-Printed Mold Geometries for a Hybrid Rocket Engine

Aerospace, 2021
The feasibility of 3D-printed molds for complex solid fuel block geometries of hybrid rocket engines is investigated. Additively produced molds offer more degrees of freedom in designing an optimized but easy to manufacture mold.
Benedict Grefen, Johannes Becker, Stefan Linke, Enrico Stoll   +3 more
doaj   +1 more source

Purification and Properties of Polyvinyl Nitrate and Its Compatibility With Solid Oxidizers

Propellants, Explosives, Pyrotechnics, Volume 51, Issue 8, Page 1224-1234, August 2026.
ABSTRACT Polyvinyl nitrate (PVN) is a nitrate‐ester energetic binder that can be produced directly from polyvinyl alcohol—a cheap commodity feedstock—thereby offering potential cost and supply‐chain advantages over binders based on nitrocellulose and other specialty polymers.
Stephen Spice, Monica C. Chandwani, Carole A. Morrison, Colin R. Pulham   +3 more
wiley   +1 more source

Study of physico-chemical properties of raw materials for solid propellant

Авіаційно-космічна техніка та технологія, 2022
In the study of the physicochemical properties of low molecular weight polybutadiene rubber with functional hydroxyl groups (Hydroxyl Terminated Poly Butadien – HTPB), which is a raw material for solid rocket fuel (SRP), an experimental batch of rubber ...
Viktor Muratov, Sergey Borisenko, Nikolay Koshevoy, Anatoliy Sanin, Maxim Kravchenko   +4 more
doaj   +1 more source

Long‐Term Marine‐Induced Aging Mechanisms in FDM‐Printed PC, ABS and HIPS: Molecular and Microstructural Evolution

Macromolecular Materials and Engineering, Volume 311, Issue 7, July 2026.
ABSTRACT Additive manufacturing by fused deposition modelling (FDM) has expanded the use of engineering thermoplastics in environments where long‐term durability remains insufficiently characterized. In this work, the molecular and microstructural aging mechanisms of FDM‐printed polycarbonate (PC), acrylonitrile–butadiene–styrene (ABS) and high‐impact ...
Esperanza Díaz, Yolanda Merodio, Igor Puerto, José Manuel Zubeldia‐Reina, Xabier León   +4 more
wiley   +1 more source

Controllable Energy Release of Boron@Tannic Acid@Ammonium Perchlorate Energetic Microunits Governed by Cu Single Atoms

Rare Metals, Volume 45, Issue 7, July 2026.
ABSTRACT Controllable energy release in solid propellants has always been a challenging technology, and extensive efforts have been devoted to the synthesis and application of catalysts to achieve its controllable release. In this study, tannic acid (TA) and its complexes (TA‐Cu) were introduced into boron@ammonium perchlorate (B@AP) composites using ...
Yong Kou, Ben Liu, Ronghuan Yang, Yongjun Gu, Xiaolong Fu, Qiangqiang Lu, Jiahao Yu, Jun Di, Guigao Liu, Lei Xiao, Fengqi Zhao, Wei Jiang, Gazi Hao   +12 more
wiley   +1 more source