Vapor pressure of di-tert-butyl peroxide

Indritz, Doren; Stone, J. P.; Williams, Frederick W.

doi:10.1021/je60076a002

Cited by 13 publications

(7 citation statements)

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“…In addition to the initiation heat source, control over the monomer partial pressure is essential to achieving iCVD coatings . Figure shows the equilibrium vapor pressure of the DTBP and GMA, where the operating pressure of 1 torr is shown by a horizontal dashed line. Note that near room temperature, the DTBP will enter a superheated state when pumped down to 1 torr, whereas GMA will have a comparatively small vapor pressure.…”

Section: Resultsmentioning

confidence: 99%

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An Evaporative Initiated Chemical Vapor Deposition Coater for Nanoglue Bonding

et al. 2017

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The authors present an evaporative initiated chemical vapor deposition (iCVD) coater and use it to establish a submicron bonding process for millimeter-scale foils with potentially rough surface features. The coater uses a simple benchtop design suited to research labs, with pre-heated metal pins instead of hot filaments, and direct evaporation of reactants within the chamber. Coatings of poly(glycidyl methacrylate) (pGMA) with thickness 100-800 nm are achieved at rates of 10-40 nm min À1 on substrates common in high energy laser compression experiments. Coating uniformities of 10-30 nm mm À1 are demonstrated in a %60 Â 10 mm zone under the heated pins. As an aside, the authors further show the ability to coat intentionally non-uniform layers in a monomer vapor diffusion gradient. Coatings are formed on both plastics and solids ranging from smooth, non-burred silicon or lithium fluoride to rough and burred metals (aluminum and copper). These coated substrates are then chemically bonded under mild heat and pressure. Detailed surface, thickness, and cross-sectional characterization is performed to confirm a submicron bond gap and to troubleshoot the common clearance issues from burrs, roughness, and surface curvature. Peeling and dropping bond strength tests confirm the bonds are robust, when coated and assembled under conditions to mitigate clearance issues.

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Section: Resultsmentioning

confidence: 99%

“…The vapor pressure of DTBP (gray) and GMA (black) as a function of temperature. The horizontal dashed line shows the iCVD coater operating pressure.…”

Section: Resultsmentioning

confidence: 99%

An Evaporative Initiated Chemical Vapor Deposition Coater for Nanoglue Bonding

et al. 2017

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“…Condensation of water is excluded, because the concentration has a maximum of 90% relative humidity so the dew point cannot be reached. The analyte concentration is adjusted in two ways: (i) by adjusting the temperature of the analyte source according to the Antoine equations parameterized for TATP and DADP according Ewing et al and Indritz et al for DTBP. Due to this the vapor pressure of the substances in the cooling unit is degraded, and lower concentrations are attainable.…”

Section: Methodsmentioning

confidence: 99%

Detection of triacetone triperoxide using temperature cycled metal‐oxide semiconductor gas sensors

Warmer

Wagner

Schöning

et al. 2015

Physica Status Solidi (a)

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The temperature‐dependent sensing properties of metal‐oxide semiconductor gas sensors (MOX), based on SnO2 and WO3, to measure triacetone triperoxide (TATP), diacetone diperoxid (DADP), and di‐tert‐butyl‐peroxide (DTBP) and acetone are described. Conductivity measurements in the range from 100 to 400 °C operating temperature show two different reaction pathways on the surface for WO3 sensors. At temperatures below 150 °C organic peroxides react as an oxidizer which leads to an increase in the sensor resistance. Above 200 °C they react as a reducing agent that leads to a decrease of the sensor resistance. This effect is caused by two different, peroxide dependent reaction paths. The unique behavior of WO3‐based sensors can be used for selectivity enhancements in temperature cycle operation mode. With this method gas concentrations down to a few ppb are detectable. Scheme of TATP reacting on tungsten oxide semiconductor gas sensor. TATP decomposes and this leads to an increase of the sensor resistance at low temperatures and a decrease of resistance at high temperatures.

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“…In the absence of measured values for heat and mass diffusivity of DTBP, or for its critical parameters, the transport properties are calculated as follows. Using the boiling point T b = 384.3 K [7] and Lydersen's method [6], we obtain the critical state of DTBP as…”

Section: Thermochemical and Transportmentioning

confidence: 99%

Experimental studies of the role of chemical kinetics in turbulent flames

Burluka

Griffiths

Liu

et al. 2009

Combust Explos Shock Waves

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Flames of di-t-butyl-peroxide (DTBP) decomposition in a 0.376DTBP + 1.0N 2 mixture are studied in laminar and turbulent media. The observed values of unstretched laminar burning velocity are in reasonable agreement with the value obtained from the Zel'dovich-Semenov-Frank-Kamenetsky theory. Turbulent explosions in this particular mixture are characterized by a number of features that are believed to be common for all developing turbulent flames and have relevance to spark-ignition engine combustion of lean mixtures. Flame propagation is unsteady and is characterized by a mass burning rate that increases in time. The rate of the flame acceleration varies from one explosion to another. If the burning rate is related to the average flame radius, however, it exhibits much smaller variations. This phenomenon bears a striking resemblance to cycle-to-cycle variations in a spark-ignition engine. Comparisons of the present results with mixtures of significantly different composition, chemical kinetics, and exothermicity, but with similar laminar flame speed and Lewis number show that the data obtained in closed-volume explosions are in good agreement if the unsteady character of the flame is taken into account. The differences in details of the kinetic mechanisms and thermochemistry appear to be responsible for the flame behaviour only near the limit of extinction by turbulence.

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Vapor pressure of di-tert-butyl peroxide

Cited by 13 publications

References 0 publications

An Evaporative Initiated Chemical Vapor Deposition Coater for Nanoglue Bonding

An Evaporative Initiated Chemical Vapor Deposition Coater for Nanoglue Bonding

Detection of triacetone triperoxide using temperature cycled metal‐oxide semiconductor gas sensors

Experimental studies of the role of chemical kinetics in turbulent flames

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