Non-isothermal DSC and rheological curing of ferrocene-functionalized, hydroxyl-terminated polybutadiene polyurethane

The curing reaction of a novel linear segmented polyurethane (PU) based on a functional metallo-polyol derivative of hydroxyl-terminated polybutadiene (HTPB), (ferrocenylbutyl)dimethylsilane-grafted HTPB, and isophorone diisocyanate (IPDI) is studied under non-isothermal conditions. This reaction is...

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Bibliographic Details
Published inReactive & functional polymers Vol. 107; pp. 60 - 68
Main Authors and, Beatriz Lucio, de la Fuente, José Luis
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.2016
Subjects
Chemorheology
DSC
Kinetic
Metallo-polyol
Non-isothermal
Polyurethane
Non-isothermal
Kinetic
DSC
Metallo-polyol
Polyurethane
Chemorheology
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Summary:The curing reaction of a novel linear segmented polyurethane (PU) based on a functional metallo-polyol derivative of hydroxyl-terminated polybutadiene (HTPB), (ferrocenylbutyl)dimethylsilane-grafted HTPB, and isophorone diisocyanate (IPDI) is studied under non-isothermal conditions. This reaction is of particular interest in advanced composite energetic materials for the aeronautic technology. Differential scanning calorimetry (DSC) indicates that the curing mechanism involves multiple reactions, which was further substantiated by a rheological analysis. Rheometry was used to analyse the chemorheological behaviour through the evolution of both complex viscosity (η⁎) and storage modulus (Gʹ) at four different heating rates. The profiles obtained for the viscosity were applied to four- and six-parameter Arrhenius models. The curves of rheological conversion degree were also obtained from the elastic modulus data, and values for the activation energy of this polyaddition reaction were estimated by the application of Kissinger's method.
ISSN:1381-5148
DOI:10.1016/j.reactfunctpolym.2016.08.002