用含的有机共聚合物修改环氧涂层
Dmitriy V Krutskikh1, Aleksey V Shapagin2, Irina O Plyusnina2
1Department of Chemical Technology of Polymeric Composite Paints and Coatings, Mendeleev University of Chemical Technology, Miusskaya Sq. 9, 125047 Moscow, Russia.
Polymers
|June 19, 2024
概括
研究人员开发了新的有机共聚合物用于疏水涂层. 这些修饰剂改善了环氧漆的质量.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 表面工程是什么?表面工程是什么?
背景情况:
- 开发疏水涂层存在挑战,通常是由于修饰剂与聚合物矩阵的兼容性差.
- 修饰剂分离可以降低涂料的整体性能.
研究的目的:
- 在环氧矩阵中合成有机共聚合物,以提高相容性和疏水效率.
- 研究这些共聚合物的结构性质关系.
主要方法:
- 有机共聚合物的合成,具有不同的含单元.
- 评估共聚合物与环氧树脂的兼容性.
- 使用接触角测量测量疏水效率的测量.
- 对修改涂料的物理机械性能进行评估.
主要成果:
- 增加的含量增强了共聚物与环氧基质的兼容性,但降低了疏水性.
- 合成修饰剂的小额添加增加了商业环氧漆的接触角度,从63°增加到87°.
- 没有观察到其他物理机械性质的恶化.
结论:
- 有机共聚合物为可调节的疏水涂层提供了一条可行的途径.
- 这些修饰剂在油漆和涂料中的应用方面表现有前途,改善了不影响性能的抗水性.
相关概念视频
02:04Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
03:00Preparation of Epoxides
Overview
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...
01:19Oxidation and Reduction of Organic Molecules
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
The removal of an electron from a molecule, results in a...
01:23Properties of Organometallic Compounds
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
01:13Olefin Metathesis Polymerization: Overview
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...