Results 41 to 50 of about 11,171 (240)
Materials & DesignConventional polyurethanes for implants suffer from hydrolytic/oxidative degradation due to ester/ether bonds. To overcome this, in this research, we have developed aging-resistant implantable medical polyurethanes to address the issue of their limited ...
Minghui Cui +9 more
doaj +1 more source
A study of solid ramjet fuel containing boron–magnesium mixtures
Propulsion and Power Research, 2017 Solid fuel ramjets (SFRJ) are known for their operational simplicity and high specific impulse. The performance of the SFRJ propulsion system is directly tied to the energy density and combustion behavior of the fuel.
EricT. Sandall +4 more
doaj +1 more source
, 1980 A process for preparing dianhydrides that are miscible with hydroxyl prepolymers at moderate temperatures and can cure hydroxyl prepolymers to elastomers at moderate temperatures is disclosed.
Ingham, J. D., Rhein, R. A.
core +1 more source
Recent advances of non‐invasive sensors for smart wearable respiratory monitoring
VIEW, EarlyView.Respiration contains rich physiological and pathological information, making it one of the most fundamental and continuous vital signs. Respiration monitoring is a non‐invasive and simple, but incredibly powerful, tool for assessing health, managing disease, and tracking fitness.
Jianhui Chen +8 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 +4 more
doaj +1 more source
Role of strain induced crystallization and oxidative crosslinking in fracture properties of rubbers [PDF]
, 2014 Tensile properties and crack propagation properties, especially critical strain energy release rate in mode I, GIC, have been used to investigate fracture properties of elastomers and their relationships with microstructure.
BROUDIN, Morgane +5 more
core +5 more sources
Polymer Composites, Volume 47, Issue 5, Page 3983-3993, 10 March 2026.Lignin dispersion in carboxylated nitrile rubber (XNBR) is enhanced at 7% carboxylic acid, significantly improving the composite's compressive mechanical performance for sealing applications. ABSTRACT Lignin is a promising biobased material that enhances the sustainability of rubber composites as a reinforcing filler.
Gustavo Ninho Campos +6 more
wiley +1 more source
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 +3 more
doaj
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 +1 more
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Modelling , of Polyurethanes Based on Hydroxyl- Terminated Polybutadiene
Defence Science Journal, 1998 Forty formulations based on four different grades ofhydroxyl-terminated polybutadiene, HTPB(hydroxyl value 20- 40 mg KOHlg) at r = [NCO] / [OH] values in the range 0.7 -1.0 with varyingamounts of trimethylol propane and butane diol and containing 86 per cent solid loading wereconsidered to test the applicability of a.-model of Marsh, et al.
Manohar Singh +3 more
openaire +1 more source