Results 51 to 60 of about 883 (166)

Olefin Polymerizations Oriented by Rational Designs of Group‐13 Compounds

The Chemical Record, Volume 26, Issue 3, March 2026.
In coordination olefin polymerization chemistry, boron and aluminum compounds play important roles in both catalyst components and monomers. This personal account introduces our recent progress on the development of catalyst systems featured by the design of group‐13 counteranions, as well as the application of boronic acid‐crosslinked polyolefins to ...
Ryo Tanaka, Yu Zou
wiley   +1 more source

Acúmulo de cargas elétricas em propelente sólido compósito com matriz de polibutadieno líquido hidroxilado

Química Nova, 2014
Composite solid propellants prepared with HTPB prepolymer - Hydroxyl Terminated Polybutadiene, AP - Ammonium Perchlorate as oxidizer and aluminum particles as an additive metal, have characteristics of high electrical resistivity.
Silvio Manea, Gabriela Knippelberg B. Manea, Koshun Iha, José A. F. F. Rocco   +3 more
doaj   +1 more source

Comparative Assessment of Energetic Plasticizers Including NFPEG3N3 in a GAP/HMX Formulation: Mechanics, Stability, Combustion, and Performance

Propellants, Explosives, Pyrotechnics, Volume 51, Issue 2, Page 269-276, February 2026.
ABSTRACT We examine the new energetic plasticizer 3‐(2‐(2‐(2‐azidoethoxy)ethoxy)ethoxy)‐4‐nitro‐1,2,5‐oxadiazole (NFPEG3N3), three reference compounds (BDNPA/F, Bu‐NENA, and DNDA‐57), and a plasticizer‐free control in a fixed HMX/GAP composite. NFPEG3N3 provides the strongest low‐temperature properties, yielding the lowest formulation glass transition ...
Patrick Lieber, Uwe Schaller, Thomas M. Klapötke   +2 more
wiley   +1 more source

Síntese de poliuretanos modificados por óleo de mamona empregados em materiais energéticos

Química Nova, 2013
The aim of this work was to synthesize a polyurethane polymer matrix using castor oil as a polymer chain modifier, whose characteristics can be adjusted for use as a binder in the manufacture of energetic materials such as propellant and pyrotechnics for
Roberta Jachura Rocha, José Eduardo Salgueiro Lima, Susane Ribeiro Gomes, Koshun Iha, José Atílio Fritz Fidel Rocco   +4 more
doaj   +1 more source

Optimizing Epoxy Vitrimer Composites With Sustainable Cellulose Nanofibril Reinforcements: Enhancing Thermal Dimensional Stability While Preserving Dynamic Covalent Behavior

Polymer Composites, Volume 47, Issue 1, Page 164-175, 10 January 2026.
A vitrimer nanocomposite based on nanofibrillated cellulose was fabricated using controlled resin infiltration, without the need for any functionalization. It exhibited excellent thermal dimensional stability and recyclability, positioning it as a promising material for next‐generation, eco‐responsible composites and protective coating aligned with ...
Isis Castro‐Cabrera, Armand Fahs, Sophie Berlioz, Pascal Carriere   +3 more
wiley   +1 more source

Processing, Characterization, and Detonation Testing of Explosive/Wax/Graphite Charges With CL‐20/HMX Cocrystals

Propellants, Explosives, Pyrotechnics, Volume 51, Issue 1, Page 31-38, January 2026.
Increased detonation performance of a explosive formulation with CL‐20/HMX cocrystal compared to the HMX and RDX based OWC and HWC. ABSTRACT Granulates of explosive/wax/graphite formulations, oktogen/wax/graphite formulation (OWC), hexogen/wax/graphite formulation (HWC), PBX‐formulation of the FhG ICT (PHX) 151, and PHX 153 with 1,3,5,7‐tetranitro‐1,3 ...
Michael Herrmann, Peter Gerber, Tobias Baust   +2 more
wiley   +1 more source

Prediction of Propellant Electrostatic Sensitivity Based on Small-Sample Machine Learning Models

Aerospace
Hydroxyl-terminated-polybutadiene (HTPB)-based composite solid propellants are extensively used in aerospace and defense applications due to their high energy density, thermal stability, and processability.
Fei Wang, Kai Cui, Jinxiang Liu, Wenhai He, Qiuyu Zhang, Weihai Zhang, Tianshuai Wang   +6 more
doaj   +1 more source

Preliminary research of composite rocket propellants with hexogen and titanium oxide powder [PDF]

Scientific Technical Review, 2018
Composite solid propellants based on ammonium perchlorate/hydroxyl-terminated polybutadiene/isophorone dyisocyanate including two levels of hexogen (RDX) are presented in this paper. The mass of RDX increased in relation to oxidant, with constant bimodal
Rodić Vesna, Bogosavljević Marica, Milojković Aleksandar, Mijatov Slavko   +3 more
doaj  

Estudo da decomposição térmica de propelente sólido compósito de baixa emissão de fumaça Study of thermal decomposition of a smokelles propellant

Química Nova, 2008
The thermal decomposition of hydroxyl-terminated polybutadiene (HTPB)/ammonium nitrate (AN) based propellants, so called smokeless formulations, and raw materials were investigated by differential scanning calorimetry (DSC) and thermogravimetry (TG). The
Jony Andrade, Antonio Gonçalves Frutuoso, Koshun Iha, José Atílio Fritz Fidel Rocco, Eduardo M. Bezerra, Jivaldo do Rosário Matos, Maria Encarnación Vázquez Suárez-Iha   +6 more
doaj   +1 more source

Calculation for Primary Combustion Characteristics of Boron-Based Fuel-Rich Propellant Based on BP Neural Network

Journal of Combustion, 2012
A practical scheme for selecting characterization parameters of boron-based fuel-rich propellant formulation was put forward; a calculation model for primary combustion characteristics of boron-based fuel-rich propellant based on backpropagation neural ...
Wu Wan'e, Zhu Zuoming
doaj   +1 more source