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International Journal of Energetic Materials and Chemical Propulsion

Publicado 6 números por año

ISSN Imprimir: 2150-766X

ISSN En Línea: 2150-7678

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.7 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 0.7 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00016 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.18 SJR: 0.313 SNIP: 0.6 CiteScore™:: 1.6 H-Index: 16

Indexed in

MIXING OF HYDROXYL-TERMINATED POLYBUTADIENE AND BORON

Volumen 2, Edición 1-6, 1993, pp. 190-195
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v2.i1-6.80
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SINOPSIS

Mixing tests between boron and hydroxyl terminated polybutadiene ( HTPB ) often result in high viscous slurries. A research program about boron impurities and boron-HTPB mixtures was performed to explain this phenomenon. The viscosity of the mixture increases only if the shear Is sufficiently high. The evolution of the increase in viscosity stops when the stirring is discontinued. The gel permeation chromatography analysis of the boron-HTPB mixtures indicates the formation of very high molecular mass species, albeit the most of the polymer remains unmodified. The same result is obtained with boric anhydride or boric acid. The acidities were measured on a suspension of boron in a solvent by a potentiometric method. There are three acidities : a weak acidity ( pK =11 ), a middle ( pK between 7 and 9 ), and at times a strong ( pK = 4 ). The phenomenon described above is linked to the boron acidity. The results show that the HTPB hydroxy1 groups are linked to the boron surface with the acid impurities.

CITADO POR
  1. Hu Xiu Li, Zhou Wei Liang, Xiao Le Qin, Jian Xiao Xia, Influence of Acidic Impurities on Rheological Properties of Boron/Agglomerated Boron and HTPB Slurry, Advanced Materials Research, 815, 2013. Crossref

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