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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of ferric acetylacetonate catalyst concentration on the cure of polyurethane based on hydroxy terminated polybutadiene and isophorone diisocyanate

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Author(s):
Willian César Paterlini [1] ; Edson Cocchieri Botelho [2] ; Luís Cláudio Rezende [3] ; Vera Lucia Lourenço [4] ; Mirabel Cerqueira Rezende [5]
Total Authors: 5
Affiliation:
[1] Universidade Estadual Paulista. Instituto de Química
[2] Centro Técnico Aeroespacial. Instituto Tecnológico de Aeronáutica. Departamento de Física
[3] Centro Técnico Aeroespacial. Instituto Tecnológico de Aeronáutica. Divisão de Química
[4] Centro Técnico Aeroespacial. Instituto Tecnológico de Aeronáutica. Divisão de Química
[5] Centro Técnico Aeroespacial. Instituto de Aeronáutica e Espaço. Divisão de Materiais
Total Affiliations: 5
Document type: Journal article
Source: Química Nova; v. 25, n. 2, p. 221-225, 2002-05-00.
Abstract

The reaction between hydroxy-terminated polybutadiene and isophorone diisocyanate constitutes the base of the curing process of the most composite solid propellant used in the propulsion of solid rocket propellant. In this work, differential scanning calorimetry and viscosity measurements were used to evaluate the effect of the ferric acetylacetonate catalyst concentration on the reaction between HTBR and IPDI. These analyses show one exotherm, which shifts to lower temperatures as the catalyst concentration increases. The viscosity analyses show that the increase of temperature causes, at first, a reduction in the mixture viscosity, reaching a minimum range called gelification region (increasing the crosslinking density). (AU)