Abstract: This paper presents results from research concerning the effect of nitrated hydroxyl-terminated polybutadiene (NHTPB), content up to 3%, on the physico-chemical, physico-mechanical and ballistic properties of heterogeneous rocket propellants based on hydroxyl-terminated polybutadiene (HTPB), ammonium perchlorate (AP) and aluminium powder.
Synthesis and characterization of polybutadiene-containing polyurethanes. Mark B. Rossman University of Massachusetts Amherst Follow this and additional works at:https://scholarworks.umass.edu/theses This thesis is brought to you for free and open access by [email protected] Amherst. It has been accepted for inclusion in Masters Theses 1911 -
Poly bd ® and Krasol resins are low molecular weight, hydroxyl-terminated homopolymers of butadiene. These hydroxyl-terminated polybutadiene (HTPB) resins are characterized by low volatiles content, low glass transition temperatures, excellent hydrophobicity and a high level of reactive functionality.
Hydroxyl-terminated Polybutadiene, Hydroxyl-terminated Polybutadiene Suppliers Directory - Find variety Hydroxyl-terminated Polybutadiene Suppliers, Manufacturers, Companies from around the World at polybutadiene rubber,hydroxyl-terminated polybutadiene htpb,polybutadiene polymer, Polymer
Hydroxyl-terminated polybutadiene (HTPB) is an oligomer of butadiene terminated at each end with a hydroxyl functional group. It reacts with isocyanates to form polyurethane polymers. HTPB is a translucent liquid with a color similar to wax paper and a viscosity similar to corn syrup.
RCS Hydroxyl-terminated Polybutadiene (HTPB) resin has a functionality of 2.4 - 2.6, which results in a higher crosslink density than lower functionality HTPB with the better room temperature curatives (like our modified MDI isocyanate), without resorting to other ingredients that can adversely affect the cure chemistry.
Hydroxyl-terminated polybutadiene (HTPB) with high cis-1,4 content (>95.0%) has been prepared via a two-step method by taking commercial butadiene rubber (BR9000) as a starting material, including ...
The hydroxyl terminated polybutadiene (HTPB) used in this work was prepared by free radical polymerization using hydrogen peroxide as initiator and was received from HEMRL Pune, India, as a gift sample. The molecu-lar weight and polydispersity of the HTPB was deter-mined by using gel permeable chromatography (GPC) technique.
A novel approach is proposed for estimating the average molecular weight between crosslinks (M̄ c) from the functionality distribution of hydroxyl-terminated polybutadiene (HTPB). The functionality distribution of four free-radically polymerised HTPB prepolymers of varying hydroxyl content and molecular weight was determined by a combination ...
Raw Materials and Chemicals Hydroxyl-Terminated Polybutadiene Liquid Resins for Adhesives Applications Hydroxyl-terminated polybutadiene resin-based polyurethane elastomers offer solutions to strenuous applications in the sealants and adhesives market.
Hydroxyl-terminated polybutadiene [r]: Known as HTPB, a polymer of butadiene, is a thick, sticky liquid, available with different viscosities, used as a binder for plastic-bonded explosives and solid-fuel rocket engines, as an adhesive and sealant, and as a feedstock for polyurethane production [e]
Inc, Exton, Pa., is reportedly the first to be made from hydroxyl-terminated polybutadiene. Poly bd 2035 and three other related TPU grades have a novel multiblock structure and a polybutadiene backbone that gives greater resistance to strong acids and bases than standard TPUs.
A series of high-performance hydroxyl-terminated polybutadiene liquid resins* (series A resins) is used worldwide in adhesives, sealants, and electrical applications due to their low glass-transition (Tg) temperatures (-75°C), hydrophobicity, acid-base resistance, and excellent dielectric properties.
Ammonium perchlorate (AP)-based composite propellants have been a workhorse in the field of solid rocket propulsion for more than five decades. This type of propellant typically contains a multi-modal distribution of AP (NH 4 ClO 4) grains (∼20 to 200 mm) embedded in the hydroxyl-terminated polybutadiene (HTPB) matrix. The physiochemical ...
Polybutadiene, hydroxyl terminated average Mw ~2,400, average Mn ~1,200; CAS Number: 69102-90-5; find Sigma-Aldrich-387665 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich.
Hydroxyl Terminated. Poly bd ® resins are low molecular weight, hydroxyl-terminated homopolymers of butadiene. These hydroxyl-terminated polybutadiene (HTPB) resins are characterized by low volatiles content, low glass transition temperatures, excellent hydrophobicity and a highly reactive functionality.
Micro-structural Effect on Hydroxy Terminated Poly Butadiene (HTPB) Prepolymer and HTPB Based Composite Propellant. Abhijit Dey *, Arun K. Sikder and Javaid Athar. Energetic Materials Research Division, High Energy Materials Research Laboratory (Defense Research & Development Organization), Sutarwadi, Pune, India
The decomposition chemistry and kinetics of hydroxyl-terminated polybutadiene (HTPB), hydroxyl-terminated polyethyleneglycol adipate (HTPA), and diisocyanate cross-linked HTPB (diisocyanates = TDI, IPDI, and DDI) were determined by TGA, DSC, and IR spectroscopy at 10°C/min and by SMATCH/FTIR at 250°–350°C/s.
Read "Hydroxyl-terminated polybutadiene, Polymer Bulletin" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Hydroxyl-terminated polybutadiene is within the scope of WikiProject Polymers which aims to improve the coverage of polymer-related articles in Wikipedia. If you are interested, you may visit the project page and join with us. Feel free to leave messages at the project talk page.
EPOXIDIZED, HYDROXYL TERMINATED POLYBUTADIENE RESIN Poly bd® 605E TYPICAL PHYSICAL AND CHEMICAL PROPERTIES DESCRIPTION Poly bd ® 605E is an, epoxidized polybutadiene resin offering the compounder a variety of functionalities for formulating finished products. The 605E resin is hydroxyl terminated and brings hydrophobicity, flexibility and
How is Hydroxy-Terminated Polybutadiene (Polymer, propellant) abbreviated? HTPB stands for Hydroxy-Terminated Polybutadiene (Polymer, propellant). HTPB is defined as Hydroxy-Terminated Polybutadiene (Polymer, propellant) frequently.
nature : liquid hydroxy terminated polybutadiene prepolymers (also known as HTPB) as a binder for the main composite propellant. By hydroxyl plastic, solid oxidizer (ammonium perchlorate, etc.), metal fuels (aluminum, etc.) and other functional additives evenly mixed, with the two isocyanate curing reaction derived.
High price is identified as main restraints in the hydroxyl-terminated polybutadiene market, which is expected to hinder the market growth in the coming years. The high price of the polymer is significantly higher as compared to solid polybutadiene rubber, which is expected to directly affect it usage by small manufacturers.
Liquiflex-H is commercially available hydroxyl terminated polybutadiene (HTPB) produced by Petroflex. It was analyzed by 1 H and 13 C NMR spectroscopy with regard to three main hydroxylated end groups. The NMR assignments related to three main alcoholic functions has raised some controversy in the literature and is considered further in our ...
Hydroxyl-terminated polybutadiene (HTPB) with high cis-1,4 content (>95.0%) has been prepared via a two-step method by taking commercial butadiene rubber (BR9000) as a starting material, including the one-pot synthesis of aldehyde-group-terminated polybutadiene (ATPB) in high efficiency and the subsequent reduction reaction.
Hydroxy terminated polybutadiene is a low molecular weight telechelic, translucent liquid rubber which finds a wide range of applications. The presence of double bonds and hydroxyl end groups can ...
This paper reports the synthesis and properties of nitrated hydroxy-terminated polybutadiene (NHTPB), an energetic binder which combines the excellent elastomeric properties of hydroxy-terminated polybutadiene (HTPB) with the energy associated with nitrate-ester groups, and is potentially useful in propellant, explosive and pyrotechnic systems.
17 Özgür Hocaoğlu, Tülay Özbelge, Fikret Pekel, Saim Özkar, Fine-tuning the mechanical properties of hydroxyl-terminated polybutadiene/ammonium perchlorate-based composite solid propellants by varying the NCO/OH and triol/diol ratios, Journal of Applied Polymer Science, 2002, 84, 11, 2072Wiley Online Library
Home → Density of Polymers (by density) Chemical Name Density (g/cc) ... Polybutadiene, cis & trans-36% trans: 0.90: Poly(vinyl 2-ethylhexyl ether) 0.904: Polyisoprene:
Copyright © 2019. Richest Group All rights reserved.