1、极限氧指数_百度百科

极限氧指数是指在规定的条件下，材料在氧氮混合气流中进行有焰燃烧所需的最低氧浓度。 以氧所占的体积百分数的数值来表示。

2、什么是LOI极限氧指数测定

LOI极限氧指数定义在规定条件下，试样在氧、氮混合的气体中，维持平衡燃烧所需的最低氧浓度（体积百分含量）。 聚合物的氧指数与其燃烧时的成炭率、比燃烧焓及元素组成等因素有关。 很多高聚物的燃烧焓、氧化焓及起…

3、Fire Resistance of Plastics: Limiting Oxygen Index (LOI)

Learn in detail about Limiting Oxygenation Index (LOI) test method used to assess fire resistance and and explore typical values for various plastics.

4、Limiting oxygen index (LOI) values and UL94 vertical test results of

Limiting oxygen index (LOI) values and UL94 vertical test results of the control resin and the phosphate-based epoxy resins (EP-P1 and EP-P2) cured with various curing agents

An oxygen index evaluation of flammability on modified epoxy/polyester

These materials were tested in order to determine the Limiting Oxygen Index (LOI), which is a measure of the fire performance properties of a given material. Particular attention was paid to the FR properties of compounds, which are free of halogen such as bromine, in the absence of antimony oxide.

LIMITING OXYGEN INDEX

LIMITING OXYGEN INDEX The Limiting Oxygen Index (LOI) is the measure of the minimum percentage of oxygen it takes in an air-like gas mixture to support flaming combustion. In the unmodified state, i.e. no flame retardants, polymers vary greatly in their ability to support combustion at normal atmospheric conditions. It is

南京工业大学Yu, Yuan：机器学习指导的含磷阻燃剂设计以

本研究通过ML方法建立了一个预测EPs阻燃性能的模型，为设计高性能EP复合材料提供了新思路。 同时，研究人员合成的BDOPO阻燃剂具有较高的阻燃效果，这为制备更安全的材料提供了新的选择。 此外，该研究还为OPFRs的设计提供了指导，有望在防火材料领域产生更广泛的应用。

Limiting Oxygen Index

The Limiting Oxygen Index (LOI) is defined as the minimal concentration of oxygen in an oxygen/nitrogen mixture required to sustain flame combustion of a material for three minutes or to consume a length of five centimeters of the sample.

<br>机器学习引导设计有机磷阻燃剂提高环氧树脂限氧指数

By combining descriptors encoded from OPFR molecules and the addition amount as features, an ML model with the limiting oxygen index (LOI) as the target was developed with a coefficient of determination (R) of the ML model on the test set of 0.642.

Limiting

The fire-retardant properties of the composites were investigated by using limiting oxygen index (LOI), vertical burning test (UL 94 V), thermogravimetric analysis (TGA), and mass loss...

In modern industry, evaluating material properties is critical to ensuring product quality and safety. Among these properties, the limiting oxygen index (LOI)—a key indicator of a material’s combustion behavior—plays a vital role in assessing its fire safety performance. This article aims to explore the LOI of gumalinone resin and analyze its characteristics in depth.

1. Introduction to Gumalinone Resin

Gumalinone resin is a thermosetting polymer synthesized from the reaction of phenolic resin and formaldehyde. It is widely used in wood preservation, adhesives, and composite materials due to its excellent water resistance, chemical corrosion resistance, and superior mechanical properties. its flammable nature necessitates strict adherence to safety protocols during application.

2. Definition and Significance of Limiting Oxygen Index

The limiting oxygen index refers to the minimum oxygen concentration (%) required for a material to sustain combustion under oxygen-rich conditions. It reflects the material’s self-ignition capability in air and serves as a critical metric for evaluating flame retardancy. A lower LOI indicates better fire resistance, as it delays flame spread and reduces fire risks.

3. Analysis of Gumalinone Resin’s Limiting Oxygen Index

To assess the flame retardancy of gumalinone resin, researchers often employ standardized tests such as the UL-94 vertical burning test. During testing, resin samples are exposed to controlled oxygen environments until surface ignition occurs. The LOI is determined based on combustion speed and duration.

4. Characteristics of Gumalinone Resin’s Limiting Oxygen Index

Gumalinone resin typically exhibits a high LOI, attributed to its robust heat resistance and chemical stability. These properties prevent ignition at high temperatures and slow combustion processes. Nevertheless, the resin still poses inherent autoignition risks when exposed to ignition sources.

5. Application Challenges of Gumalinone Resin

Despite its favorable flame retardancy, gumalinone resin faces practical challenges. For instance, its processing may release irritant fumes, hazardous to operators. Additionally, its poor thermal stability can lead to deformation or toxic substance release under high-temperature conditions. Developing novel modifiers to enhance its overall performance remains a critical research direction.

As a high-performance thermosetting resin, gumalinone resin holds significant potential in fire-resistant applications. By improving its LOI, the risk of spontaneous combustion can be effectively mitigated, enhancing safety in specific environments. unlocking its full potential requires ongoing optimization of modification strategies to meet broader application demands.