A Viscometric study of mixtures with Hydroxyl-terminated polybutadiene (HTPB) and short chain diols used in the formulations of solid composite propellants

Abstract Hydroxyl-terminated polybutadiene (HTPB) is widely used in the formulations of solid propellants used in rocket motors. Furthermore, in general, chain extenders and short chain diols, such as 1,4-butanediol and 1,2-propanediol, can also be used in propellant formulations to improve mechanic...

Full description

Saved in:
Bibliographic Details
Published in:Anais da Academia Brasileira de Ciências 2021-01, Vol.93 (suppl 4), p.e20201729-e20201729
Main Authors: CUNHA, BRUNO C.C. DA, DOMINGUES, MARCELA G., ROCCO, JOSÉ A.F.F.
Format: Article
Language:English
Subjects:
Chain extenders
MULTIDISCIPLINARY SCIENCES
propellant
solid propulsion
viscometry
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Abstract Hydroxyl-terminated polybutadiene (HTPB) is widely used in the formulations of solid propellants used in rocket motors. Furthermore, in general, chain extenders and short chain diols, such as 1,4-butanediol and 1,2-propanediol, can also be used in propellant formulations to improve mechanical properties, especially tensile strength. However, the incorporation of these diols can result in a considerable increase in the viscosity of the mixture during the processing of propellants. Thus, the present study evaluated the compatibility of these diols with the HTPB prepolymer, through a viscometric study, with the aim to determine the order of addition that results in greater homogeneity for the mixture. It was concluded that 1,4-butanediol, due to its larger chain size, has better compatibility with HTPB resin than 1,2-propanediol. On top of that, it was found that when the resin is added first, it results in mixtures with greater compatibility.
ISSN:0001-3765
1678-2690
1678-2690
DOI:10.1590/0001-3765202120201729