Investigation into the Coating and Desensitization Effect on HNIW of Paraffin Wax/Stearic Acid Composite System

Wang, Dongxu; Chen, Shusen; Jin, Shaohua; Shu, Qinghai; Jiang, Zhenming; Shang, Fengqin; Li, Jinxin

doi:10.1080/07370652.2014.993049

Cited by 29 publications

(11 citation statements)

References 24 publications

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“…As is known, PW has been widely used as fuel and desensitizer in hybrid propulsion and polymer-bonded explosives (PBX), owing to the high burning rate, low cost, and superior desensitization effect. − In addition, hydroxyl-terminated polybutadiene (HTPB) was preferred to be fuel or binders since it could provide easy availability, desirable manufacture, and polymeric properties required by hybrid propulsion and PBX. − Sinha et al investigated the ablation rate and thermal and mechanical properties of HTPB blended with different percentages of paraffin. Nevertheless, there is much difference in molecular weight and polarity between HTPB and PW, resulting in weak compatibility between the two phases .…”

Section: Introductionmentioning

confidence: 99%

Thermal Property Enhancement of Paraffin-Wax-Based Hydroxyl-Terminated Polybutadiene Binder with a Novel NanoSiO₂-Expanded Graphite-PW Ternary Form-Stable Phase Change Material

et al. 2018

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High volume change and low thermal conductivity will impede the application of paraffin wax (PW). Expanded graphite (EG) is one of the best materials to shape-stabilize PW and improve its thermal conductivity. NanoSiO2 is also considered as a good supporting material of PW. Herein, a novel nanoSiO2-EG-PW ternary form-stable phase change material (FSPCM) with enhanced thermal properties was reported. Subsequently, the effect of nanoSiO2-EG-PW with different amounts on the chemical composition, morphology, and thermal properties of PW-based hydroxyl-terminated polybutadiene (HTPB) was investigated using Fourier transformed infrared spectroscopy (FTIR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermal gravimetric analyzer (TGA), thermal cycling test, and thermal conductivity, respectively. These results indicated that nanoSiO2-EG-PW could effectively shape-stabilize PW in the HTPB matrix without chemical reaction. The thermal conductivity of nanoSiO2-EG-PW was improved from 0.303 W·m–1·K–1 to 0.602 W·m–1·K–1, compared with that of PW. The nanoSiO2-EG-PW/PW/HTPB composites kept high latent heat capacity, delayed melting temperature, and good thermal reliability after 500-thermal-cycling. Moreover, the thermal stability and thermal conductivity of the composites increased, with the increasing content of nanoSiO2-EG-PW. Therefore, these materials have a potential application in high-temperature phase change material (PCM) and HTPB binder.

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Section: Introductionmentioning

confidence: 99%

Thermal Property Enhancement of Paraffin-Wax-Based Hydroxyl-Terminated Polybutadiene Binder with a Novel NanoSiO₂-Expanded Graphite-PW Ternary Form-Stable Phase Change Material

et al. 2018

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“…These results are in accordance with previous studies [ 25 , 37 , 38 ]. As explained previously, strength reduction of hydrowax-treated paper samples can be attributed to a) allocation of a considerable amount of low to medium molecular weight fractions of hydrophobic hydrowax between the fibers, which may hinder the equal distribution of the applied mechanical stresses around the fibers, and thus reduce the interfiber bonding strength, and b) formation of hydrowax matrices with poor mechanical strength that encompassed the cellulosic fibers [ 37 , 39 ]. A look at the data presented in Figure 3 reveals that paper-sheets treated with TODP2- and TODP4-based formulations demonstrate superior bonding strength.…”

Section: Resultsmentioning

confidence: 99%

Hydrophobic Formulations Based on Tall Oil Distillation Products for High-Density Fiberboards

Hosseinpourpia

Αδαμόπουλος

Walther³

et al. 2020

Materials

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This study investigates the effect of renewable formulations based on tall oil bio-refinery products on the water vapor sorption and interfiber strength of cellulosic fibers as well as on the properties of high-density fiberboard (HDF) panels. The results obtained for HDF prepared using renewable formulations were compared to the results for HDF obtained using conventional synthetic paraffin wax (hydrowax), which is the hydrophobic agent currently utilized by the industry. Four tall oil distillation products (TODPs) with different levels of fatty and rosin acids were used for preparing the hydrophobic formulations with furfuryl alcohol as an organic solvent. According to determinations with an automated vapor sorption apparatus, the formulations had a similar effect with hydrowax on the sorption behavior of natural fibers. Unlike to hydrowax treatment, the ultimate tensile strength of cellulosic paper-sheets treated with the formulations remained unchanged or significantly increased. At the standard addition load of 1% (wt/wt dry fibers) of the formulations, HDF panels showed comparable and only in one case, e.g., TODP3-based formulation, slightly higher thickness swelling (24 h) than those with hydrowax. The best performing formulation (TODP2-based) in terms of tensile strength of paper sheets did not significantly change the mechanical properties of HDF panels in both standard climate and high humid conditions. Promising results at the standard and humid climate conditions were obtained for HDF panels manufactured with higher TODP2-based formulation amounts (3–5%) and reduced melamine-urea-formaldehyde resin content (10–12% instead of 14%, wt dry resin/wt dry fibers).

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“…HNIW-based PBX molding powders were prepared using an aqueous suspension method [11]. Firstly, fifty grams of HNIW was added into 100 mL water under agitation with a stirring rate of 600 rpm and then the suspension was slowly heated up to 50 8C in a water bath maintained for half an hour.…”

Section: Preparation Of Hniw-based Pbx Molding Powdersmentioning

confidence: 99%

Investigation into the Temperature Adaptability of HNIW‐based PBXs

Jin

Jing

et al. 2019

Propellants Explo Pyrotec

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2,4,6,8,10,12‐Hexanitro‐2,4,6,8,10,12‐hexaazaisowurtzitane (HNIW) based polymer bonded explosives (PBXs) were prepared through an aqueous suspension method using cellulose acetate butyrate (CAB) or fluorine rubber F2311 as a binder. Then the variation rules of size, mass, surface micro‐topography, mechanical properties, thermal decomposition performance and mechanical sensitivity of the samples were investigated experimentally before and after high temperature (HT), low temperature (LT), high temperature cycle (HTC) and temperature shock (TS) tests, respectively. The results showed that the PBX columns, with the change rates of size and mass less than 1 %, were still at an acceptable level after temperature adaptability tests, and that the surface unevenness of the PBX samples followed the descending order of HT>HTC>LT>TS, which was in a good agreement with the order of mass loss. Moreover, the stability of the samples might be decreased by temperature adaptability tests, among which TS had the largest effect on both HNIW/CAB and HNIW/F2311. And a correlation between mechanical sensitivity and mechanical properties was found out through that the mechanical sensitivity of the PBXs stayed almost unchanged with a slight increase in the tensile strength of the columns after HTC whereas at least one sensitivity was increased markedly with the decline of the tensile strength after HT, LT or TS.

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Investigation into the Coating and Desensitization Effect on HNIW of Paraffin Wax/Stearic Acid Composite System

Cited by 29 publications

References 24 publications

Thermal Property Enhancement of Paraffin-Wax-Based Hydroxyl-Terminated Polybutadiene Binder with a Novel NanoSiO₂-Expanded Graphite-PW Ternary Form-Stable Phase Change Material

Thermal Property Enhancement of Paraffin-Wax-Based Hydroxyl-Terminated Polybutadiene Binder with a Novel NanoSiO₂-Expanded Graphite-PW Ternary Form-Stable Phase Change Material

Hydrophobic Formulations Based on Tall Oil Distillation Products for High-Density Fiberboards

Investigation into the Temperature Adaptability of HNIW‐based PBXs

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Investigation into the Coating and Desensitization Effect on HNIW of Paraffin Wax/Stearic Acid Composite System

Cited by 29 publications

References 24 publications

Thermal Property Enhancement of Paraffin-Wax-Based Hydroxyl-Terminated Polybutadiene Binder with a Novel NanoSiO2-Expanded Graphite-PW Ternary Form-Stable Phase Change Material

Thermal Property Enhancement of Paraffin-Wax-Based Hydroxyl-Terminated Polybutadiene Binder with a Novel NanoSiO2-Expanded Graphite-PW Ternary Form-Stable Phase Change Material

Hydrophobic Formulations Based on Tall Oil Distillation Products for High-Density Fiberboards

Investigation into the Temperature Adaptability of HNIW‐based PBXs

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Product

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Thermal Property Enhancement of Paraffin-Wax-Based Hydroxyl-Terminated Polybutadiene Binder with a Novel NanoSiO₂-Expanded Graphite-PW Ternary Form-Stable Phase Change Material

Thermal Property Enhancement of Paraffin-Wax-Based Hydroxyl-Terminated Polybutadiene Binder with a Novel NanoSiO₂-Expanded Graphite-PW Ternary Form-Stable Phase Change Material