Documents disponibles écrits par cet auteur

Ammonium polyphosphate with crystalline form V by ammonium dihydrogen phosphate process / Gousheng Liu in Industrial & engineering chemistry research, Vol. 49 N° 12 (Juin 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5523–5529 Titre : Ammonium polyphosphate with crystalline form V by ammonium dihydrogen phosphate process Type de document : texte imprimé Auteurs : Gousheng Liu, Auteur ; Xinchun Liu, Auteur ; Jianguo Yu, Auteur Année de publication : 2010 Article en page(s) : pp. 5523–5529 Note générale : Chemistry engineering Langues : Anglais (eng) Mots-clés : Ammonium  polyphosphate  Crystalline  form  V  Condensation  water-solubility Résumé : Ammonium polyphosphate (APP) with crystalline form V (APP-V) was prepared through the reaction of ammonium dihydrogen phosphate and urea at high temperature and under dry ammonia atmosphere. Effects such as raw material ratios, ammoniation, condensation temperature, and condensation time were examined. Its water-solubility was tested and compared with those of industrial APP-I and APP-II. FTIR, XRD, and TGA techniques were used to characterize this product. The thermal degradation of APP-V was examined and compared with that of APP-I and APP-II; the molecular structure of this APP-V was speculated and discussed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100453a [article] Ammonium polyphosphate with crystalline form V by ammonium dihydrogen phosphate process [texte imprimé] / Gousheng Liu, Auteur ; Xinchun Liu, Auteur ; Jianguo Yu, Auteur . - 2010 . - pp. 5523–5529. Chemistry engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5523–5529 Mots-clés : Ammonium  polyphosphate  Crystalline  form  V  Condensation  water-solubility Résumé : Ammonium polyphosphate (APP) with crystalline form V (APP-V) was prepared through the reaction of ammonium dihydrogen phosphate and urea at high temperature and under dry ammonia atmosphere. Effects such as raw material ratios, ammoniation, condensation temperature, and condensation time were examined. Its water-solubility was tested and compared with those of industrial APP-I and APP-II. FTIR, XRD, and TGA techniques were used to characterize this product. The thermal degradation of APP-V was examined and compared with that of APP-I and APP-II; the molecular structure of this APP-V was speculated and discussed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100453a

A novel process to prepare ammonium polyphosphate with crystalline form II and its comparison with melamine polyphosphate / Gousheng Liu in Industrial & engineering chemistry research, Vol. 49 N° 23 (Décembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 23 (Décembre 2010) . - pp. 12148–12155 Titre : A novel process to prepare ammonium polyphosphate with crystalline form II and its comparison with melamine polyphosphate Type de document : texte imprimé Auteurs : Gousheng Liu, Auteur ; Wenyan Chen, Auteur ; Jianguo Yu, Auteur Année de publication : 2011 Article en page(s) : pp. 12148–12155 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ammonium  polyphosphate  Crystalline Résumé : P4O10 is highly deliquescent and reactive; techniques using non-P4O10 process are not only required for environmental protection, but also for consideration of safety and cost in industrial-scale production. A non-P4O10 process to prepare ammonium polyphosphate with crystalline form II (APP-II) was proposed by heating the mixture of diammonium hydrogen phosphate (DAP) and melamine under wet ammonia. Its water solubility, FT-IR, XRD, and 31P NMR spectra were compared with those of commercial APP-II and melamine polyphosphate (MPoly), and interesting results were obtained. Thermogravometric analysis (TGA) showed the synthesized APP-II had better thermal stability than commercial APP-II. The reaction mechanism and molecular structure for the subject compound were investigated and discussed in detail. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1014102 [article] A novel process to prepare ammonium polyphosphate with crystalline form II and its comparison with melamine polyphosphate [texte imprimé] / Gousheng Liu, Auteur ; Wenyan Chen, Auteur ; Jianguo Yu, Auteur . - 2011 . - pp. 12148–12155. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 23 (Décembre 2010) . - pp. 12148–12155 Mots-clés : Ammonium  polyphosphate  Crystalline Résumé : P4O10 is highly deliquescent and reactive; techniques using non-P4O10 process are not only required for environmental protection, but also for consideration of safety and cost in industrial-scale production. A non-P4O10 process to prepare ammonium polyphosphate with crystalline form II (APP-II) was proposed by heating the mixture of diammonium hydrogen phosphate (DAP) and melamine under wet ammonia. Its water solubility, FT-IR, XRD, and 31P NMR spectra were compared with those of commercial APP-II and melamine polyphosphate (MPoly), and interesting results were obtained. Thermogravometric analysis (TGA) showed the synthesized APP-II had better thermal stability than commercial APP-II. The reaction mechanism and molecular structure for the subject compound were investigated and discussed in detail. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1014102

Probabilistic prognosis of fatigue crack growth using acoustic emission data / Boris A. Zarate in Journal of engineering mechanics, Vol. 138 N° 9 (Septembre 2012) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 138 N° 9 (Septembre 2012) . - pp.1101–1111. Titre : Probabilistic prognosis of fatigue crack growth using acoustic emission data Type de document : texte imprimé Auteurs : Boris A. Zarate, Auteur ; Juan M. Caicedo, Auteur ; Jianguo Yu, Auteur Année de publication : 2012 Article en page(s) : pp.1101–1111. Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Structural  health  monitoring  Fatigue  crack  growth  Acoustic  emission  Model  updating  Bayesian  inference  Probabilistic  prognosis Résumé : This paper presents a structural health monitoring methodology that uses acoustic emission (AE) features to predict crack growth in structural elements subjected to fatigue. This allows for the prediction of the failure of the structural element at the current load level. The methodology uses Bayesian inference to account for different sources of uncertainty such as uncertainty in the data (AE signal), unknown fracture mechanics parameters, and model inadequacy. The methodology is divided into two main components: a model updating component that uses available data to build a joint probability distribution of the different unknown fracture mechanics parameters, and a prognosis component in which this multivariable probability distribution is sampled to predict the stress intensity factor range at a future number of cycles. The application of the methodology does not require knowledge of the load amplitude nor the initial crack length. The methodology is validated using experimental data from a compact test specimen under cyclic loading. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000414 [article] Probabilistic prognosis of fatigue crack growth using acoustic emission data [texte imprimé] / Boris A. Zarate, Auteur ; Juan M. Caicedo, Auteur ; Jianguo Yu, Auteur . - 2012 . - pp.1101–1111. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 138 N° 9 (Septembre 2012) . - pp.1101–1111. Mots-clés : Structural  health  monitoring  Fatigue  crack  growth  Acoustic  emission  Model  updating  Bayesian  inference  Probabilistic  prognosis Résumé : This paper presents a structural health monitoring methodology that uses acoustic emission (AE) features to predict crack growth in structural elements subjected to fatigue. This allows for the prediction of the failure of the structural element at the current load level. The methodology uses Bayesian inference to account for different sources of uncertainty such as uncertainty in the data (AE signal), unknown fracture mechanics parameters, and model inadequacy. The methodology is divided into two main components: a model updating component that uses available data to build a joint probability distribution of the different unknown fracture mechanics parameters, and a prognosis component in which this multivariable probability distribution is sampled to predict the stress intensity factor range at a future number of cycles. The application of the methodology does not require knowledge of the load amplitude nor the initial crack length. The methodology is validated using experimental data from a compact test specimen under cyclic loading. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000414