Results 51 to 60 of about 4,253 (212)

Transverse relaxation characteristic and stress relaxation model considering molecular chains of HTPB coating based on pre-strained thermal aging

open access: yesDefence Technology, 2021
In order to accurately describe the transverse relaxation characteristic and stress relaxation modulus of HTPB coating during pre-strain thermal aging process, a one month thermal aging test was carried out at 70 °C with pre-strain of 0%, 3%, 6% and 9 ...
Yong-qiang Du   +3 more
doaj   +1 more source

Thermo‐Mechanical Evaluation of Novel Composite Propellant Formulations Based on Styrene‐Ethylene/Butylene‐Styrene Block Copolymer

open access: yesPropellants, Explosives, Pyrotechnics, Volume 50, Issue 11-12, Page 117-126, December 2025.
ABSTRACT Two novel composite propellant formulations have previously been produced from a binder consisting of the thermoplastic elastomer styrene‐ethylene/butylene‐styrene (SEBS) and a solid filler, either ammonium perchlorate (AP) or 1,3,5‐trinitro‐1,3,5‐triazinane (RDX).
Peter J. Wilkinson   +2 more
wiley   +1 more source

Hydroxyl-terminated polybutadiene liner curing process monitoring using non-collinear ultrasonic wave mixing technique

open access: yesAIP Advances
The Hydroxyl-Terminated Polybutadiene (HTPB) liner in solid rocket motors is a viscoelastic material formed through the polymerization and gelation of HTPB and toluene diisocyanate.
Dawei Wang, Yuxin Xie, Xinyi Gao
doaj   +1 more source

Study on the interfacial interaction between ammonium perchlorate and hydroxyl-terminated polybutadiene in solid propellants by molecular dynamics simulation

open access: yese-Polymers, 2022
The interfacial interaction between the main oxidant filler ammonium perchlorate (AP) and hydroxyl-terminated polybutadiene (HTPB) matrix in AP/HTPB propellants were studied via an all-atom molecular dynamics simulation.
Dong Ge   +6 more
doaj   +1 more source

Large Supramolecular Patterns in Photoactive Chiral Liquid Crystals for Light‐Controllable Soft Micromechanical Systems

open access: yesSmall Structures, Volume 6, Issue 12, December 2025.
Revolving chiral patterns are induced by an ultraviolet light beam in frustrated films of photoactive chiral nematics. The uniformity and regularity of the rotation depend on the ratio of the pattern size to the diameter of the light spot. The rotation is interrupted when this ratio reaches about eight.
Darina Darmoroz   +2 more
wiley   +1 more source

Sustainable Synthesis of Polyurethane Using Hydroxyl‐Terminated Polybutadiene (HTPB) Derived From the Degradation of Butadiene Rubber with Fatty Alcohol

open access: yesMacromolecular Materials and Engineering, Volume 310, Issue 11, November 2025.
This study proposes a synthesis route for polyurethanes (PUs) derived from bio‐based polyols. The polyols were obtained through metathesis depolymerization of butadiene rubber using fatty alcohol (a castor oil derivative) as a chain transfer agent to produce hydroxyl‐terminated polybutadiene (HTPB).
Manuel Burelo   +8 more
wiley   +1 more source

Exploring Effect of a Ternary Filler System on Low Hysteresis and Improved Wet Grip Properties of Sustainable and Fuel‐Efficient Tyre Tread Formulations

open access: yesMacromolecular Materials and Engineering, Volume 310, Issue 10, October 2025.
This study investigates the mechanical, thermal, and dynamic mechanical properties of an eco‐friendly, green tyre tread compound, focusing on a ternary filler (CB, exfoliated graphite/modified silica) system. These findings establish modified silica as a key enabler in the development of next‐generation green tyres, offering a high‐performance ...
Bijina V   +3 more
wiley   +1 more source

Study on Thermal Degradation Characteristics and Regression Rate Measurement of Paraffin-Based Fuel

open access: yesEnergies, 2015
Paraffin fuel has been found to have a regression rate that is higher than conventional HTPB (hydroxyl-terminated polybutadiene) fuel and, thus, presents itself as an ideal energy source for a hybrid rocket engine.
Songqi Hu   +4 more
doaj   +1 more source

A Structural Integrity Perspective for the Assessment of Ageing in Composite Solid Propellants

open access: yesPropellants, Explosives, Pyrotechnics, Volume 50, Issue 10, Page 152-158, October 2025.
ABSTRACT Composite solid propellants (CSPs) are critical materials in the defence and aerospace industries, known for their complex mechanical behaviour and susceptibility to ageing. This study explores the application of Principal Component Analysis (PCA) to discriminate the ageing degradation of CSPs based on structural integrity parameters.
Mario Martínez   +3 more
wiley   +1 more source

Amine‐AlH3 Adducts as Energetic Materials for a New Generation of Solid Fuels

open access: yesChemistry – A European Journal, Volume 31, Issue 40, July 17, 2025.
New amine‐AlH₃ adducts offer a more environmentally friendly, high‐energy alternative to conventional rocket propellants, and exhibit ultra‐fast ignition. They can be synthesized by mechanochemical method under hydrogen pressure starting from aluminum metal directly or by wet chemical processes with AlH3.
Xiaoran Liu   +4 more
wiley   +1 more source

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