Results 181 to 190 of about 10,094 (259)
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Laser pyrolysis of hydroxyl-terminated polybutadiene
Journal of Propulsion and Power, 1996A 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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Synthesis of Azide-Functionalized Hydroxyl-Terminated Polybutadiene
Journal of Energetic Materials, 2016This article reports ways to functionalize hydroxyl-terminated polybutadiene (HTPB) by azide groups to impart energetic properties to the polymer. Two different synthetic approaches were explored to synthesize azide-functionalized hydroxyl-terminated polybutadiene (azide-HTPB).
Chandra Shekhar Pant +4 more
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Properties of hydroxyl‐terminated polybutadiene‐urethane systems
Journal of Applied Polymer Science, 1971AbstractThe properties of liquid hydroxyl‐terminated polybutadiene (HTPB) stocks crosslinked with isocyanates of different functionalities were intensively investigated. The stocks were modified by inclusion of small proportions of various low molecular weight diols to increase the urethane concentration. The following studies were carried out: (1) the
John P. Consaga, David M. French
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The molecular characteristics of hydroxyl‐terminated polybutadiene
British Polymer Journal, 1985AbstractThree 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 +4 more
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Propellants, explosives, pyrotechnics
Conventional solid propellants have used ammonium perchlorate (AP) as the efficient oxidizer; however, it emits toxic HCl gas during combustion. Therefore, employing green oxidizers such as ammonium nitrate (AN) is one approach to reduce exhaust ...
Prabhat Dattakumar Phondekar +1 more
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Conventional solid propellants have used ammonium perchlorate (AP) as the efficient oxidizer; however, it emits toxic HCl gas during combustion. Therefore, employing green oxidizers such as ammonium nitrate (AN) is one approach to reduce exhaust ...
Prabhat Dattakumar Phondekar +1 more
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Polymer, 2016
Abstract A series of hydroxyl functionalized polybutadienes has been prepared by combining the oxidolysis and reduction of cis-polybutadiene rubber (BR). For the first time, multi-hydroxyl polybutadiene (MHPB) with α,ω- and intrachain hydroxyl groups was synthesized through the simultaneous reduction of –CHO and epoxy groups in epoxidized aldehyde ...
Qinzhuo Zhou +4 more
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Abstract A series of hydroxyl functionalized polybutadienes has been prepared by combining the oxidolysis and reduction of cis-polybutadiene rubber (BR). For the first time, multi-hydroxyl polybutadiene (MHPB) with α,ω- and intrachain hydroxyl groups was synthesized through the simultaneous reduction of –CHO and epoxy groups in epoxidized aldehyde ...
Qinzhuo Zhou +4 more
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Terminal functionalized hydroxyl‐terminated polybutadiene: An energetic binder for propellant
Journal of Applied Polymer Science, 2009AbstractWe report the functionalization of hydroxyl terminated polybutadiene (HTPB) backbone by covalently attaching 1‐chloro‐2, 4‐dinitrobenzene (DNCB) at the terminal carbon atoms of the HTPB. The modification of the HTPB by the DNCB does not alter the unique physico–chemical properties and the microstructure of the parent HTPB.
Rajavelu Murali Shankar +2 more
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, 2023
Seeking to parameterize models for simulating the deflagration of hydroxyl-terminated polybutadiene type R45M, we employed atomistic molecular dynamics (MD) methods to obtain estimates for some of R45M’s transport and thermophysical properties. Estimates
Jeffrey D Veals +4 more
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Seeking to parameterize models for simulating the deflagration of hydroxyl-terminated polybutadiene type R45M, we employed atomistic molecular dynamics (MD) methods to obtain estimates for some of R45M’s transport and thermophysical properties. Estimates
Jeffrey D Veals +4 more
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Functionality Distribution of Carboxyl- and Hydroxyl-Terminated Polybutadiene
Journal of Macromolecular Science: Part A - Chemistry, 1973Abstract 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
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, 2023
Seeking additional validation of a paradigm for modeling the deflagration of hydroxyl-terminated polybutadiene type R45M that is predicated on the nascent gaseous products of its pyrolysis being represented by 6-ethenyl-2,8,12,16-octadecetetraene (EODT ...
Michael McQuaid +3 more
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Seeking additional validation of a paradigm for modeling the deflagration of hydroxyl-terminated polybutadiene type R45M that is predicated on the nascent gaseous products of its pyrolysis being represented by 6-ethenyl-2,8,12,16-octadecetetraene (EODT ...
Michael McQuaid +3 more
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