Results 151 to 160 of about 1,563 (196)

Characterization of hydroxyl-terminated polybutadiene

Polymer Bulletin, 1994
Liquiflex is a commercial hydroxyl terminated polybutadiene (HTPB) produced by Brazilian technology. It was characterized with respect to molecular weight, functionallty, microstructure and hydroxyl group types. The results were compared with those obtained for R45M and R45TH Atochem products.
W. D. Vilar, S. M. C. Menezes, L. Akcelrud   +2 more
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Characterization of hydroxyl-terminated polybutadiene

Polymer Bulletin, 1997
The structures of hydroxyl terminated polybutadienes (HTPB) obtained by free radical polymerization of butadiene in ethanol medium initiated by thermal and photochemical hydrogen peroxide decomposition were studied. The incorporation of alcohol in the polymer chain ends was evidenced by 1 H and 13 C NMR spectroscopy.
W. D. Vilar, M. T. M. Moutinho, S. M. C. Menezes, F. M. B. Coutinho   +3 more
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Reaction between azide molecule with hydroxyl terminated polybutadiene

, 2018
S.134.1-134.9In previous work the compatibility between azide molecules and HTPB was discussed in terms of Gel Permeation Chromatography (GPC) and continuously recording Vacuum Stability Test (VST) results.
Ferrapontoff Lemos, Mauricio, Dörich, Manuela, Keicher, Thomas, Bohn, Manfred A., Mendes, C.   +4 more
openaire   +2 more sources

Characterization of hydroxyl-terminated polybutadiene

Polymer Bulletin, 1995
A comparison between the molecular structure of conventional and low molecular weight hydroxyl terminated polybutadienes (HTPBs) is presented. The conventional HTPB samples were R45M, R45HT (Atochem), Liquiflex P and H (Petroflex, Brazil), and the low molecular weight ones were R20LM (Atochem) and two laboratory synthesized materials.
W. D. Vilar, S. M. C. Menezes, L. Akcelrud   +2 more
openaire   +1 more source

Molecular characterization of hydroxyl‐terminated polybutadienes

Journal of Applied Polymer Science, 1984
AbstractA comparative study has been made on the functionality distribution of two hydroxyl terminated polybutadiene products which are used largely as prepolymers for sealants, adhesives, and solid propellants. They are known to possess nearly the same molecular characteristics.
Hiroshi Inagaki, Nobuo Donkai, Akihisa Saitoh, Yukio Zenitani   +3 more
openaire   +1 more source

Laser pyrolysis of hydroxyl-terminated polybutadiene

Journal of Propulsion and Power, 1996
A method was developed for measuring the dynamic regression rate and plume transmission loss during laser pyrolysis of polymeric binder materials. This method was applied to an investigation of the thermal decomposition of hydroxyl-terminated polybutadiene.
D. R. Esker, M. Q. Brewster
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The molecular characteristics of hydroxyl‐terminated polybutadiene

British Polymer Journal, 1985
AbstractThree samples of a commercial hydroxyl‐terminated polybutadiene, Arco R45M. were characterised with respect to number‐average and weight‐average molar mass, intrinsic viscosity, number‐average hydroxyl functionality and effective functionality for gelation.
Peter R. Regan, Hoon Hong Teo, Colin Booth, Anthony V. Cunliffe, Alan L. Hudd   +4 more
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Dynamic shearing resistance of hydroxyl-terminated polybutadiene (HTPB)

Journal of Applied Physics, 2021
Hydroxyl-terminated polybutadiene (HTPB) is a widely used polymeric binder in polymer-bonded explosives (PBXs) and solid rocket propellants. Even though used in small fractions, the elastomeric binder absorbs much of the impact energy and therefore requires careful modeling of its mechanical behavior to accurately simulate the response of PBXs when ...
Pinkesh Malhotra, Tong Jiao, David L. Henann, Rodney J. Clifton, Pradeep R. Guduru   +4 more
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Azo initiators for the preparation of hydroxyl‐terminated polybutadienes

Journal of Polymer Science: Polymer Chemistry Edition, 1983
AbstractAzo compounds such as di(4‐hydroxybutyl)‐2,2′‐azobisisobutyrate, di(3‐hydroxybutyl)‐2,2′‐azobisisobutyrate, di(2‐hydroxypropyl)‐2,2′‐azobisisobutyrate, and di(2‐hydroxyethyl)‐2,2′‐azobisisobutyrate were prepared and used as initiators for the preparation of hydroxyl‐terminated polybutadienes (HTPBs) of molecular weight (M̄n) ranging from 2000 ...
B. B. Idage, S. P. Vernekar, N. D. Ghatge   +2 more
openaire   +1 more source

Functionality Distribution of Carboxyl- and Hydroxyl-Terminated Polybutadiene

Journal of Macromolecular Science: Part A - Chemistry, 1973
Abstract Elurion from silica gel was used to fractionate liquid polymers according to the number of chemically reactive groups per molecule (the functionality). Methods are presented for the functionality fractionation of high and low functionality carboxyl-terminated polybutadiene (CTPB).
M. S. Chang, D. M. French, P. L. Rogers
openaire   +1 more source