CN112129796A - Preparation method of combustion carbon layer for analyzing flame-retardant mechanism - Google Patents
Preparation method of combustion carbon layer for analyzing flame-retardant mechanism Download PDFInfo
- Publication number
- CN112129796A CN112129796A CN202010989099.8A CN202010989099A CN112129796A CN 112129796 A CN112129796 A CN 112129796A CN 202010989099 A CN202010989099 A CN 202010989099A CN 112129796 A CN112129796 A CN 112129796A
- Authority
- CN
- China
- Prior art keywords
- flame
- retardant
- combustion
- carbon layer
- polymer sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/2202—Preparing specimens therefor
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/5033—Amines aromatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/504—Amines containing an atom other than nitrogen belonging to the amine group, carbon and hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/53—Phosphorus bound to oxygen bound to oxygen and to carbon only
- C08K5/5317—Phosphonic compounds, e.g. R—P(:O)(OR')2
- C08K5/5333—Esters of phosphonic acids
- C08K5/5353—Esters of phosphonic acids containing also nitrogen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/225—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion
- G01N23/2251—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion using incident electron beams, e.g. scanning electron microscopy [SEM]
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/07—Investigating materials by wave or particle radiation secondary emission
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/10—Different kinds of radiation or particles
- G01N2223/102—Different kinds of radiation or particles beta or electrons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/30—Accessories, mechanical or electrical features
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Fireproofing Substances (AREA)
Abstract
The invention relates to a preparation method of a combustion carbon layer for analyzing a flame-retardant mechanism, which comprises the following steps: (1) blending epoxy resin, a curing agent and a flame retardant, stirring at a high speed to obtain a semitransparent mixture, and crosslinking and curing the mixture to obtain a flame-retardant polymer sample; (2) wrapping the bottom of the flame-retardant polymer sample by using an aluminum foil, placing the flame-retardant polymer sample on a tray of a cone calorimeter, putting the sample into a combustion chamber for combustion after the cone calorimeter is heated to a set temperature, quickly taking out the flame-retardant polymer sample after the flame-retardant polymer sample is combusted for a set time, immersing the flame-retardant polymer sample into liquid nitrogen for ultralow temperature cooling, and recovering the flame-retardant polymer sample to room temperature to obtain a flame-retardant polymer combustion carbon layer. The invention controls the temperature by the cone calorimeter before burning, so that the burning process and time of the whole carbon layer are completely controllable, the real change process of burning the carbon layer in a specific burning time from the real burning process is mastered, the shape change process of the polymer during burning is obtained, and the analysis accuracy of the flame retardant mechanism is improved.
Description
Technical Field
The invention relates to the technical field of flame retardant test analysis means, in particular to a preparation method of a combustion carbon layer for analyzing a flame retardant mechanism.
Background
The flame retardant is a functional aid capable of imparting flame retardancy to a flammable polymer, and a condensed phase flame retardant is an important one of them. It can prevent the polymer from thermal decomposition and release combustible gas in the solid phase, thereby achieving the flame-retardant effect.
Specifically, the flame retardant forms a molten glass-like substance or a foam carbon layer to cover the surface of the polymer at high temperature, so that heat and oxygen are isolated, and combustible gas is prevented from escaping outwards, thereby achieving the purpose of flame retardance. Therefore, observing and analyzing the state of the molten glass-like substance or the foamy carbon layer covering the surface of the polymer is a key ring for researching the flame retardant mechanism of the condensed phase flame retardant. However, in the combustion process, the sample is always in a high-temperature environment, and the ash layer on the combustion surface of the sample makes direct observation and sampling difficult.
At present, most researches only adopt an indirect method, and the real carbon layer appearance of a sample in the combustion process cannot be obtained. Compared with the epoxy resin system flame-retardant by phosphorus-nitrogen compounds, such as those of the licensed army et al [ Xu MJ, Xia SY, Liu C, et al, preparation of poly (phosphorus acid piperazine) and its application as an effective flame retardant for epoxy resin, Chinese J.Polymer.Sci.2018, 36,655 664], the flame-retardant mechanism of the flame-retardant system can be predicted only by observing and analyzing the morphology and chemical composition of the residual carbon layer after combustion, the real change process of the carbon layer during combustion is difficult to grasp, and the analysis result is not accurate enough.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a preparation method of a combustion carbon layer for analyzing a flame-retardant mechanism from a real combustion process aiming at the current situation of the prior art, and the method can master the real change process of the combustion carbon layer under a specific combustion time so as to improve the analysis accuracy of the flame-retardant mechanism.
The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of a combustion carbon layer for analyzing a flame-retardant mechanism is characterized by comprising the following steps:
(1) blending epoxy resin, a curing agent and a flame retardant, stirring at a high speed to obtain a semitransparent mixture, and crosslinking and curing the mixture to obtain a flame-retardant polymer sample;
(2) wrapping the bottom of the flame-retardant polymer sample by using an aluminum foil, placing the flame-retardant polymer sample on a tray of a cone calorimeter, putting the sample into a combustion chamber for combustion after the cone calorimeter is heated to a set temperature, quickly taking out the flame-retardant polymer sample after the flame-retardant polymer sample is combusted for a set time, immersing the flame-retardant polymer sample into liquid nitrogen for ultralow temperature cooling, and recovering the flame-retardant polymer sample to room temperature to obtain a flame-retardant polymer combustion carbon layer.
Preferably, in the step (1), the temperature of the cross-linking reaction of the mixture is 95-105 ℃, and the time of the cross-linking reaction is 1.8-2.2 h.
Preferably, in the step (1), the mixture is cured at 145-155 ℃ for 1.8-2.5 h.
Preferably, the epoxy resin is bisphenol a diglycidyl ether.
Preferably, the curing agent is 4,4 '-diaminodiphenylmethane or 4,4' -diaminodiphenyl sulfone; the flame retardant is an organic phosphorus flame retardant.
Preferably, the mass ratio of the epoxy resin, the curing agent and the flame retardant is (5-20): 1-10): 1.
Preferably, in the step (2), the size of the flame-retardant polymer sample is (50-100) × 3mm3The set temperature of the cone calorimeter is 550-600 ℃.
Preferably, in step (2), the flame retardant polymer sample burns in the combustion chamber for no more than 120 seconds.
Preferably, the morphology of the flame retardant polymer combustion carbon layer is represented by SEM images. So as to be convenient for better observing and analyzing the combustion appearance and the combustion mechanism of the flame-retardant polymer.
Compared with the prior art, the invention has the advantages that: according to the invention, the epoxy resin, the curing agent and the flame retardant are blended to prepare the flame-retardant polymer sample, then the flame-retardant polymer sample is placed on a cone calorimeter, and the temperature is controlled by the cone calorimeter before combustion, so that the combustion process and time of the whole carbon layer are completely controllable, the real change process of the combustion carbon layer in a specific combustion time and in a real combustion process is mastered, the appearance change process of the polymer in combustion is obtained, and the analysis accuracy of the flame-retardant mechanism is improved.
Drawings
FIG. 1 is an SEM photograph of a flame retardant polymer combustion carbon layer obtained in example 1 of the present invention;
FIG. 2 is an SEM image of a flame retardant polymer combustion carbon layer obtained in example 2 of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Example 1:
the preparation method of the combustion carbon layer for analyzing the flame-retardant mechanism in the embodiment comprises the following steps:
blending 80g of bisphenol A diglycidyl ether, 20g of 4,4' -diaminodiphenylmethane and 10g N, N-bis (2-hydroxyethyl) aminomethylene diethyl phosphonate, and stirring at high speed for 10-30 minutes to obtain a stable semitransparent mixture; the mixture was cross-linked at 100 ℃ for 2h and then cured in an oven at 150 ℃ for 2h to give a size of 50X 3mm3The flame retarded polymer sample of (a);
wrapping the bottom of a flame-retardant polymer sample by using an aluminum foil, placing the flame-retardant polymer sample on a tray of a cone calorimeter, putting the sample into a combustion chamber after the cone calorimeter is heated to 584 ℃, opening the combustion chamber to ignite, quickly taking out the sample after 10 seconds, immersing the sample into liquid nitrogen to carry out ultralow temperature cooling, and recovering to room temperature to obtain a flame-retardant polymer combustion carbon layer, wherein the size of the carbon layer is about 200 mu m as shown in figure 1.
Example 2:
the preparation method of the combustion carbon layer for analyzing the flame-retardant mechanism in the embodiment comprises the following steps:
blending 80g of bisphenol A diglycidyl ether, 20g of 4,4' -diaminodiphenylmethane and 10g N, N-bis (2-hydroxyethyl) aminomethylene diethyl phosphonate, and stirring at high speed for 10-30 minutes to obtain a stable semitransparent mixture; the mixture was cross-linked at 100 ℃ for 2h and then cured in an oven at 150 ℃ for 2h to give a size of 50X 3mm3The flame retarded polymer sample of (a);
wrapping the bottom of a flame-retardant polymer sample by using an aluminum foil, placing the flame-retardant polymer sample on a tray of a cone calorimeter, putting the sample into a combustion chamber after the cone calorimeter is heated to 584 ℃, igniting the flame-retardant polymer sample under the condition of opening the combustion chamber, quickly taking out the sample after 30 seconds, immersing the sample into liquid nitrogen for ultralow temperature cooling, and recovering to room temperature to obtain a flame-retardant polymer combustion carbon layer, wherein the size of the carbon layer is about 450 mu m as shown in figure 2.
Example 3:
the preparation method of the combustion carbon layer for analyzing the flame-retardant mechanism in the embodiment comprises the following steps:
80g of bisphenol A diglycidyl ether, 20g of 4,4' -diaminodiphenylmethane, 10g N, N-bis (2-hydroxyethyl) aminomethylene diethyl phosphonate are blended, stirred at high speed for 10-30 minutes to obtain a stable semitransparent mixture, the mixture is crosslinked for 2 hours at 100 ℃, and then cured for 2 hours in an oven at 150 ℃ to obtain the product with the size of 80 x 3mm3The flame retarded polymer sample of (a);
wrapping the bottom of a flame-retardant polymer sample by using an aluminum foil, placing the flame-retardant polymer sample on a tray of a cone calorimeter, putting the sample into a combustion chamber after the cone calorimeter is heated to 584 ℃, igniting the flame-retardant polymer sample under the condition of opening the combustion chamber, quickly taking out the sample after 30 seconds, immersing the sample into liquid nitrogen for ultralow temperature cooling, and recovering to room temperature to obtain a flame-retardant polymer combustion carbon layer, wherein the size of the carbon layer is about 420 mu m.
Example 4:
the preparation method of the combustion carbon layer for analyzing the flame-retardant mechanism in the embodiment comprises the following steps:
80g of bisphenol A diglycidyl ether, 20g of 4,4' -diaminodiphenylmethane, 10g N, N-bis (2-hydroxyethyl) aminomethylene diethyl phosphonate are blended, stirred at high speed for 10-30 minutes to obtain a stable semitransparent mixture, the mixture is crosslinked for 2 hours at 100 ℃, and then cured for 2 hours in an oven at 150 ℃ to obtain the product with the size of 50 x 3mm3The flame retarded polymer sample of (a);
wrapping the bottom of a flame-retardant polymer sample by using an aluminum foil, placing the flame-retardant polymer sample on a tray of a cone calorimeter, putting the sample into a combustion chamber after the cone calorimeter is heated to 566 ℃, igniting the flame-retardant polymer sample under the condition of opening the combustion chamber, quickly taking out the sample after 10 seconds, immersing the sample into liquid nitrogen for ultralow temperature cooling, and recovering to room temperature to obtain a flame-retardant polymer combustion carbon layer, wherein the size of the carbon layer is about 180 mu m.
Example 5: blending 70g of bisphenol A diglycidyl ether, 30g of 4,4' -diaminodiphenyl sulfone and 5g N, N-bis (2-hydroxyethyl) aminomethylene diethyl phosphonate, stirring at high speed for 10-30 minutes to obtain a stable semitransparent mixture, crosslinking the mixture at 100 ℃ for 2 hours, and curing in an oven at 150 ℃ for 2 hours to obtain the product with the size of 50 x 3mm3The flame retarded polymer sample of (a);
wrapping the bottom of a flame-retardant polymer sample by using an aluminum foil, placing the flame-retardant polymer sample on a tray of a cone calorimeter, putting the sample into a combustion chamber after the cone calorimeter is heated to 584 ℃, igniting the flame-retardant polymer sample under the condition of opening the combustion chamber, quickly taking out the sample after 30 seconds, immersing the sample into liquid nitrogen for ultralow temperature cooling, and recovering to room temperature to obtain a flame-retardant polymer combustion carbon layer, wherein the size of the carbon layer is about 310 mu m.
Claims (9)
1. A preparation method of a combustion carbon layer for analyzing a flame-retardant mechanism is characterized by comprising the following steps:
(1) blending epoxy resin, a curing agent and a flame retardant, stirring at a high speed to obtain a semitransparent mixture, and crosslinking and curing the mixture to obtain a flame-retardant polymer sample;
(2) wrapping the bottom of the flame-retardant polymer sample by using an aluminum foil, placing the flame-retardant polymer sample on a tray of a cone calorimeter, putting the sample into a combustion chamber for combustion after the cone calorimeter is heated to a set temperature, quickly taking out the flame-retardant polymer sample after the flame-retardant polymer sample is combusted for a set time, immersing the flame-retardant polymer sample into liquid nitrogen for ultralow temperature cooling, and recovering the flame-retardant polymer sample to room temperature to obtain a flame-retardant polymer combustion carbon layer.
2. The method of preparing a combustion char layer for analyzing a flame-retardant mechanism according to claim 1, characterized in that: in the step (1), the temperature of the mixture cross-linking reaction is 95-105 ℃, and the time of the cross-linking reaction is 1.8-2.2 h.
3. The method of preparing a combustion char layer for analyzing a flame-retardant mechanism according to claim 2, characterized in that: in the step (1), the mixture is cured at 145-155 ℃ for 1.8-2.5 h.
4. The method of preparing a combustion char layer for analyzing a flame-retardant mechanism according to claim 1, characterized in that: the epoxy resin is bisphenol A diglycidyl ether.
5. The method of preparing a combustion char layer for analyzing a flame-retardant mechanism according to claim 1, characterized in that: the curing agent is 4,4 '-diamino diphenylmethane or 4,4' -diamino diphenyl sulfone; the flame retardant is an organic phosphorus flame retardant.
6. The method for producing a combustion carbon layer for analyzing a flame-retardant mechanism according to any one of claims 1 to 5, characterized in that: the mass ratio of the epoxy resin, the curing agent and the flame retardant is (5-20): 1-10): 1.
7. The method for producing a combustion carbon layer for analyzing a flame-retardant mechanism according to any one of claims 1 to 5, characterized in that: in the step (2), the size of the flame-retardant polymer sample is (50-100) × 3mm3The set temperature of the cone calorimeter is 550-600 ℃.
8. The method for producing a combustion carbon layer for analyzing a flame-retardant mechanism according to any one of claims 1 to 5, characterized in that: in step (2), the flame retardant polymer sample burns in the combustion chamber for no more than 120 seconds.
9. The method for producing a combustion carbon layer for analyzing a flame-retardant mechanism according to any one of claims 1 to 5, characterized in that: the morphology of the flame retardant polymer combustion carbon layer is presented by the SEM image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010989099.8A CN112129796A (en) | 2020-09-18 | 2020-09-18 | Preparation method of combustion carbon layer for analyzing flame-retardant mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010989099.8A CN112129796A (en) | 2020-09-18 | 2020-09-18 | Preparation method of combustion carbon layer for analyzing flame-retardant mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112129796A true CN112129796A (en) | 2020-12-25 |
Family
ID=73841483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010989099.8A Pending CN112129796A (en) | 2020-09-18 | 2020-09-18 | Preparation method of combustion carbon layer for analyzing flame-retardant mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112129796A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175718A (en) * | 2011-02-23 | 2011-09-07 | 中南林业科技大学 | Method for measuring combustion performance of powder or liquid sample by utilizing cone calorimeter |
| CN204789153U (en) * | 2015-07-28 | 2015-11-18 | 贵州大学 | Remain charcoal layer strength test device after burning of toper calorimeter sample |
| CN105670231A (en) * | 2016-04-18 | 2016-06-15 | 扬州大学 | Preparing method of expandable carbon nitride flame-retardant epoxy resin |
| CN108587148A (en) * | 2018-05-03 | 2018-09-28 | 盘锦职业技术学院 | A method of preparing 6 fire proofing of fiberglass reinforced PA |
| CN109187411A (en) * | 2018-08-23 | 2019-01-11 | 南京林业大学 | A kind of evaluation method of nano magnalium hydrotalcite to asphalt flame retardant effect |
-
2020
- 2020-09-18 CN CN202010989099.8A patent/CN112129796A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175718A (en) * | 2011-02-23 | 2011-09-07 | 中南林业科技大学 | Method for measuring combustion performance of powder or liquid sample by utilizing cone calorimeter |
| CN204789153U (en) * | 2015-07-28 | 2015-11-18 | 贵州大学 | Remain charcoal layer strength test device after burning of toper calorimeter sample |
| CN105670231A (en) * | 2016-04-18 | 2016-06-15 | 扬州大学 | Preparing method of expandable carbon nitride flame-retardant epoxy resin |
| CN108587148A (en) * | 2018-05-03 | 2018-09-28 | 盘锦职业技术学院 | A method of preparing 6 fire proofing of fiberglass reinforced PA |
| CN109187411A (en) * | 2018-08-23 | 2019-01-11 | 南京林业大学 | A kind of evaluation method of nano magnalium hydrotalcite to asphalt flame retardant effect |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Xu et al. | Synthesis of a novel flame retardant based on cyclotriphosphazene and DOPO groups and its application in epoxy resins | |
| Wang et al. | Nitrogen/sulfur-containing DOPO based oligomer for highly efficient flame-retardant epoxy resin | |
| Li et al. | Combustion behavior and thermal degradation properties of epoxy resins with a curing agent containing a caged bicyclic phosphate | |
| Camino et al. | Thermal degradation of pentaerythritol diphosphate, model compound for fire retardant intumescent systems: part I—overall thermal degradation | |
| Prieur et al. | Phosphorylation of lignin to flame retard acrylonitrile butadiene styrene (ABS) | |
| Bifulco et al. | Improving flame retardancy of in-situ silica-epoxy nanocomposites cured with aliphatic hardener: Combined effect of DOPO-based flame-retardant and melamine | |
| Song et al. | Synthesis of a novel dicyclic silicon-/phosphorus hybrid and its performance on flame retardancy of epoxy resin | |
| Liang et al. | Enhanced flame retardancy of DGEBA epoxy resin with a novel bisphenol-A bridged cyclotriphosphazene | |
| Liu et al. | Flame retardation and thermal stability of novel phosphoramide/expandable graphite in rigid polyurethane foam | |
| Luo et al. | Novel multi‐element DOPO derivative toward low‐flammability epoxy resin | |
| Ji et al. | Toward an understanding of how red phosphorus and expandable graphite enhance the fire resistance of expandable polystyrene foams | |
| Gao et al. | Synthesis of amino trimethylene phosphonic acid melamine salt and its application in flame‐retarded polypropylene | |
| Jia et al. | An anti-melt dripping, high char yield and flame-retardant polyether rigid polyurethane foam | |
| Tian et al. | Synthesis and characterization of a novel organophosphorus flame retardant and its application in polypropylene | |
| CN110563765B (en) | Synthesis method of Schiff base phosphazene double-base structure flame retardant and modified polyurethane flame retardant | |
| CN111261942B (en) | Flame-retardant lithium ion battery electrolyte | |
| Chen et al. | Effect of charring agent THEIC on flame retardant properties of polypropylene | |
| CN112129796A (en) | Preparation method of combustion carbon layer for analyzing flame-retardant mechanism | |
| CN108912336A (en) | A kind of active amino cross-linking type phosphazene derivative, preparation method and application and fire retarding epoxide resin | |
| Zhang et al. | Fabrication of phytic acid embellished kaolinite and its effect on the flame retardancy and thermal stability of ethylene vinyl acetate composites | |
| Deng et al. | Synthesis and effect of hyperbranched (3-hydroxyphenyl) phosphate as a curing agent on the thermal and combustion behaviours of novolac epoxy resin | |
| Liu et al. | A facile strategy for enhancing the fire safety of unsaturated polyester resins through introducing an efficient mono‐component intumescent flame retardant | |
| CN110511431A (en) | A kind of nitrogen of the structure containing benzoguanamine-phosphorus system efficient flame-retarding agent and its synthesis and application | |
| Wei et al. | Performance comparison of epoxy resins modified with diphenylphosphine oxide and DOPO | |
| Wang et al. | Rosin‐Based Si/P‐Containing Flame Retardant Toward Enhanced Fire Safety Polyurethane Foam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201225 |
|
| RJ01 | Rejection of invention patent application after publication |