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Updated: Sep 13, 2025

Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
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用固体和液体阻燃剂对聚氨泡进行热和可燃性分析:比较研究

Dorota Głowacz-Czerwonka1, Patrycja Zakrzewska2, Beata Zygmunt-Kowalska2

  • 1Department of Organic Chemistry, Rzeszow University of Technology, 35-959 Rzeszow, Poland.

Polymers
|July 30, 2025
PubMed
概括

这项研究评估了硬型聚氨泡 (RPUF) 中的阻燃剂. 聚酸盐 (APP) 和Exolit OP 935显著提高了热稳定性和消防安全性,在混合系统中显示了合作效应.

关键词:
燃烧行为 燃烧行为建筑材料 建筑材料防火复合材料的复合材料具有阻燃性.聚合物的稳定性 聚合物的稳定性热降解降解的热性降解

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Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
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In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
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Molecular Weight of Step-Growth Polymers

Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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The low reactivity in alkanes can be attributed to the non-polar nature of C–C and C–H σ bonds. Alkanes, therefore, were  initially termed as “paraffins,” derived from the Latin words: parum, meaning “too little,” and affinis, meaning “affinity.”
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