Influence of processing solvents on decomposition of nitrocellulose in smokeless powders studied by heat flow calorimetry

Tomaszewski, Waldemar; Cieślak, Katarzyna; Zygmunt, Angelika

doi:10.1016/j.polymdegradstab.2014.11.010

Cited by 18 publications

(10 citation statements)

References 20 publications

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“…The shape of these curves probably is related to stabilizer depletion and formation new derivatives. Tomaszewski et al [43] observed such behavior for single-base propellants containing diphenylamine. The heat flow signal in time t m = 3.43 day (P l ) for all granules is contained below 60 μW g −1 , which is the value more than 6 times lower than the maximum allowable heat flow in STANAG 4582 (350 μW g −1 ).…”

Section: The Effect Of Stabilizer On the Properties Of Nitrocellulosementioning

confidence: 93%

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Effect of stabilizers and nitrogen content on thermal properties of nitrocellulose granules

Cieślak

Gańczyk-Specjalska

Drożdżewska-Szymańska

et al. 2020

J Therm Anal Calorim

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The granules containing nitrogen of various content (12.2-13.3%) and stabilizers (centralite I, centralite II, akardite II, triphenylamine) were obtained in laboratory scale, and the study of their physicochemical and thermal properties was conducted. It has been observed that the helium density of granules depends on the degree of gelling of nitrocellulose by the stabilizer as well as the lack of effect of the stabilizer type on the heat of combustion value. In turn, the heat of combustion depends on the content of nitrogen in nitrocellulose. Granules of 13.3% N nitrocellulose were characterized by a more rapidly developing thermal decomposition than the granules containing 12.2 and 12.9% N nitrocellulose. The maximum temperature of decomposition shifts toward higher temperatures (from 207.6 to 209.8 °C) with decreasing nitrogen content in nitrocellulose for granules containing triphenylamine as a stabilizer. All values of heat generation rate obtained for granules with triphenylamine were lower than the respective rates for granules with centralite I. Thermal properties and chemical stability of granules containing triphenylamine have better properties, when compared to other examined stabilizers. On the basis of differential scanning calorimetry and thermogravimetry, kinetic parameters were calculated by means of Ozawa-Flynn-Wall analysis. The effect of stabilizers and nitrogen content on kinetic parameters was determined. The kinetic model of thermal decomposition of granules was adjusted-the best fit was nth-order reaction with autocatalysis. The activation energy of thermal decomposition process according to the adopted chemical reaction model increases from 190 to 239 kJ mol −1 with increasing nitrogen content in the granulate.

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Section: The Effect Of Stabilizer On the Properties Of Nitrocellulosementioning

confidence: 93%

“…The authors of the publication [43] proposed an equation describing the dependence of heat cumulative (Q cumulative ) over time for HFC measurements. Using the same assumptions, a heat generation rate (k Q ) was determined according to the equation:…”

Section: Theory and Calculationmentioning

confidence: 99%

Effect of stabilizers and nitrogen content on thermal properties of nitrocellulose granules

Cieślak

Gańczyk-Specjalska

Drożdżewska-Szymańska

et al. 2020

J Therm Anal Calorim

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“…Subsequently, AIBN (0.1642 g) was added, the mixture was transferred to a 150 ml round-bottom ask and the reaction was processed at either 45 C or 55 C with continuous stirring in a dry nitrogen atmosphere for 4 h. Aer the nal removal of NC and vacuum drying, the resultant MIP particles were obtained. The amount of bound NC was calculated according to eqn (1).…”

Section: Effects Of Polymerization Conditions On Adsorption Capacitymentioning

confidence: 99%

“…Nitrocellulose (NC), a cellulose derivative, is a type of explosive material, which is the basic component of single and double base propellants. 1 It is also known as a versatile, widely used polymer with numerous civil applications, such as an additive in paints and lacquer coatings for automobile and wood furniture. 2,3 Recently, it has been applied in the fabrication of specic biosensors, especially in protein microarrays of biochips for its neutral effect on proteins and immobilization of enzymes.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a surface molecular imprinting polymer based on silica and its application in the identification of nitrocellulose

2018

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“…Thermal analysis methods are widely used for different purposes -kinetic study (Danon and Görgens [6]), thermal stability analysis (Zhang and Weeks [7]) including wood components derivatives (Tomaszewski et al [8]), thermoporometry (Książczak et al [9]). Determination of polymer content may be one of these purposes.…”

mentioning

confidence: 99%

Examination of chemical composition of wood-plastic composites by differential scanning calorimetry and infrared spectroscopy

et al. 2019

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Differential scanning calorimetry (DSC) and infrared spectroscopy (FT-IR) techniques were applied to analyze polymer type and its content in wood-plastic composites (WPC). Methods of analysis were developed on the basis of commercial and laboratory made WPC samples with different content of polypropylene (PP) and high-density polyethylene (HDPE). Polymer melting temperature was used to determine its type and melting enthalpy value was used to determine polymer content in the sample. The method was rewarding, both in qualitative and quantitative way. The absorption bands from FT-IR spectra (1508 cm-1 , i.e., aromatic skeletal vibration of lignin and 1455 cm-1 , i.e., CH 2 bending for polypropylene) were chosen to determine polymer content. Calibration curve obtained on the basis of measurements made on laboratory prepared samples with different polymer content was elaborated. Determination of polymer type with FT-IR was unequivocal, while determination of its content may cause troubles in case of samples with lower polymer content.

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Influence of processing solvents on decomposition of nitrocellulose in smokeless powders studied by heat flow calorimetry

Cited by 18 publications

References 20 publications

Effect of stabilizers and nitrogen content on thermal properties of nitrocellulose granules

Effect of stabilizers and nitrogen content on thermal properties of nitrocellulose granules

Synthesis of a surface molecular imprinting polymer based on silica and its application in the identification of nitrocellulose

Examination of chemical composition of wood-plastic composites by differential scanning calorimetry and infrared spectroscopy

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