Results 191 to 200 of about 10,094 (259)

Mesoscopic Damage Evolution of Hydroxyl‐Terminated Polybutadiene Propellants under Biaxial Tension

Propellants, explosives, pyrotechnics
This study conducted systematic in‐situ tensile scanning tests on hydroxyl‐terminated polybutadiene (HTPB) propellant under biaxial tensile conditions. It successfully acquired in‐situ experimental data at different tensile ratios.
Bin Yuan, Hongfu Qiang, Xueren Wang, Tiezhu Chen, Chunguo Yue   +4 more
semanticscholar   +1 more source

High-Pressure Combustion Characteristics of Hydroxyl-Terminated Polybutadiene Propellants

Journal of Propulsion and Power, 2023
Combustion mechanisms of propellants under high pressures are necessary to solve the problems of a high burning rate pressure exponent in high-pressure solid rocket motors. In this study, the combustion characteristics of hydroxyl-terminated polybutadiene (HTPB) propellants were investigated by analyzing the burning rate, the quenched surface, and the ...
Jinchao Han, Songqi Hu, Linlin Liu, Pengxiang He   +3 more
openaire   +1 more source

Polyurethane based on hydroxyl‐terminated polybutadienes

British Polymer Journal, 1971
AbstractButadiene has been found to homopolymerise and copolymerise with other reactive vinyl monomers to yield unique liquid polymers which are terminated with reactive allylic hydroxyl groups. Through the use of an isocyanate cure reaction they offer a route to liquid castable general purpose elastomers, capable of reinforcement with various fillers ...
openaire   +1 more source

The Role of Polytetrahydrofuran (PTHF) as Reactive Plasticizer on the Processing and Performance of Hydroxyl‐Terminated Polybutadiene (HTPB)‐Based Polyurethane Elastomers

Journal of Applied Polymer Science
Despite better processing and flexibility, conventional plasticizers, being unbound additives, tend to migrate, which adversely affects the structural integrity of the end product by modifying mechanical properties.
N. Tahir, Syazana Ahmad Zubir
semanticscholar   +1 more source

Investigating the Impact of Systematic Hard Segment Modulation on Performance of Hydroxyl Terminated Polybutadiene (HTPB) Thermoset Polyurethane Elastomers

Journal of Applied Polymer Science
Despite the versatility and extensive applications of hydroxyl‐terminated polybutadiene (HTPB)‐based thermoset polyurethanes (PUs), research on tailoring their performance through hard‐segment modulation is limited.
N. Tahir, Syazana Ahmad Zubir
semanticscholar   +1 more source

Combinations of hydroxyl‐terminated polybutadiene and boron

Journal of Polymer Science: Polymer Chemistry Edition, 1985
AbstractMixing and curing experiments with suspensions of boron in hydroxyl‐terminated polybutadiene (HTPB) have been performed. In kneading experiments on a plastograph very high viscous masses with bad curing properties were obtained. The experiments indicated that HTPB is attached with its OH groups to acidic impurities on the surface of the boron ...
openaire   +1 more source

Studies on Hydroxyl Terminated Polybutadiene Toughened Phenolic Resin

High Performance Polymers, 2006
Phenolic novolac was modified with hydroxyl terminated polybutadiene (HTPB) using resole as compatibilizer. These systems were characterized by differential scanning calorimetry, and IR analysis. Neat resin castings were prepared with varying percentages of HTPB.
C. Nirmal, S. N. Maithi, T. Padmavathi, A. Vanaja, R. M. V. G. K. Rao   +4 more
openaire   +1 more source

Thermal Degradation Behavior of Thermally‐Oxidized Hydroxyl‐Terminated Polybutadiene (HTPB): An Assessment of Thermal Stability

ChemistrySelect
Thermal analysis was performed on different thermally oxidized hydroxyl‐terminated polybutadiene (HTPB) samples, varying in molecular weights, polydispersities, and viscosities.
Muhammad Irfan, Ji Jun Xiao
semanticscholar   +1 more source

Modern Competing Flames Model for Composite Ammonium Perchlorate/Hydroxyl-Terminated Polybutadiene Propellant Combustion

Journal of Propulsion and Power, 2023
The competing flames model, also termed the Beckstead–Derr–Price model, for steady-state heterogeneous propellant combustion has been widely used but has not been sufficiently updated in decades or compared to modern propellant combustion databases.
James C. Thomas, E. Petersen
semanticscholar   +1 more source

Untangling the Efficient Boron-Initialized Hydroxyl-Terminated Polybutadiene Combustion for High Energetic Solid Propulsion Systems.

Journal of Physical Chemistry A
Highly energetic boron (B) particles embedded in hydroxyl-terminated polybutadiene (HTPB) thermosetting polymers represent stable solid-state fuel. Laser-heating of levitated B/HTPB and pure HTPB particles in a controlled atmosphere revealed spontaneous ...
Grace L Rizzo, Souvick Biswas, Dongwon Ka, Xiaolin Zheng, R. Kaiser   +4 more
semanticscholar   +1 more source