1、Synthesis of phosphorus
In this study, a phosphorus-containing and polyether structure modifier, phenolic epoxy phosphate ester (PEPE), was prepared by the reaction of phenolic epoxy resin (EPN) and phosphoric acid.
2、Preparation and properties of phosphorus‐ and silicon‐modified phenolic
In order to further improve the ablation resistance of common phenolic resins, a modified phenolic resin containing phosphorus and silicon (SPPR) was synthesized and the corresponding properties were evaluated.
3、Phosphorus modified phenolic aldehyde上海衡封新材料科技
It is a solvent based thermosetting phenolic resin modified with DOPO, which can be used in lead-free and halogen-free copper-clad laminates. The product has good compatibility with butanone, high heat resistance, flame retardancy, chemical resistance, and excellent electrical performance.
Modified Epoxy Resin Synthesis from Phosphorus—Containing
Therefore, in this study, we synthesized new epoxy resin (PPME) by modifying phosphorous-containing polyol. The prepared resin was analyzed and added to epoxy compositions in various quantities.
Catalytic Pyrolysis of Waste Epoxy Resin over Phosphorus
Epoxy resin (ER) is difficult to degrade naturally and it poses significant environmental risks. In this study, walnut shell (WS) was used to prepare phosphorus-doped activated carbon (PAC), which was employed in ER catalytic pyrolysis aimed at phenolic compound production.
Synthesis of phosphorus
In this study, a phosphorus-containing and polyether structure modifier, phenolic epoxy phosphate ester (PEPE), was prepared by the reaction of phenolic epoxy resin (EPN) and phosphoric acid.
Research progress on modification of phenolic resin
In recent years, more and more researchers have focused on the discussion of the properties of modified phenolic resins and gradually ignored the research on the synthesis processes that can affect the molecular structure and properties of phenolic resins.
Phosphorus modified phenolic resin and preparation method thereof
The invention discloses a phosphorus-modified phenolic resin material with a new chemical structural formula and a preparation method thereof.
Phosphorus
The preparation of coatings and molded discs from some modified and unmodified phosphorus-containing phenolic-resin formulations is described. Preliminary observations relating to the properties of the trial products are reported.
Synthesis of phenolic resins with cyclotriphosphazene for enhancement
The CHPP contains abundant –CH 2 OH groups, which can be a part of phenolic resin network through condensation reactions between the –CH 2 OH groups and active hydrogens on benzene rings of phenolic resins.
Modified phenolic resin, as a high-performance thermosetting resin-based composite material, has been widely used in aerospace, automotive manufacturing, electronics, and other fields due to its excellent physical and chemical properties. whether modified phenolic resin contains phosphorus has always been a focus of attention in the industry. This article starts from the definition of modified phenolic resin, explores the relationship between its main components and phosphorus, and discusses the role and significance of phosphorus in modified phenolic resin.
1. Basic Concept of Modified Phenolic Resin
Modified phenolic resin is a high-performance resin-based composite material obtained by adding specific modifiers, such as epoxy resin, polyamide, etc., to phenolic resin and treating it through chemical reactions or physical methods. This resin not only retains the excellent properties of phenolic resin, such as good adhesion, heat resistance, and chemical resistance, but also introduces other functional groups or structural units to improve its mechanical properties, temperature resistance, and corrosion resistance.
2. Main Components of Modified Phenolic Resin
Modified phenolic resin mainly consists of the following parts:
- Phenolic Resin: As the base resin, it provides the fundamental properties.
- Modifiers: Including epoxy resin, polyamide, etc., used to improve specific properties of the resin, such as enhancing heat resistance, increasing mechanical strength, etc.
- Fillers: Such as glass fiber, carbon fiber, etc., used to increase the volume density of the material and improve tensile strength.
- Additives: Such as curing accelerators, pigments, filler dispersants, etc., used to adjust the processing technology of the resin and the performance of the final product.
3. The Role of Phosphorus in Modified Phenolic Resin
The role of phosphorus in modified phenolic resin mainly manifests in the following aspects:
- Flame Retardancy: Phosphorus can react with free radicals generated during combustion to form stable phosphates, thereby inhibiting the spread of flames and achieving a flame-retardant effect.
- Improved Heat Resistance: Phosphorus compounds have good thermal stability and can maintain high chemical properties at high temperatures, thereby improving the heat resistance of modified phenolic resin.
- Enhanced Mechanical Strength: Phosphorus can increase the bond energy in the material, making it less prone to fracture under external forces and thus improving the mechanical strength of the material.
- Improved Electrical Insulation: Phosphorus compounds have good electrical insulation properties, which can effectively prevent current leakage and improve the electrical insulation of the material.
modified phenolic resin does contain phosphorus. Although the content of phosphorus is relatively low compared to the main components of the resin, it is precisely these minute phosphorus molecules that bring a series of significant performance improvements to modified phenolic resin. it can be said that modified phenolic resin is a carrier of phosphorus rather than a mere phosphorus compound. In practical applications, attention should be paid to the impact of phosphorus on material properties, and the phosphorus content should be reasonably controlled to achieve the best results.
