阶段结构法规对基终结聚propylsiloxane-modified环氧树脂的性能的影响
Yundong Ji1,2, Jun Pan1, Chengxin Xu1
1School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
Polymers
|August 14, 2025
概括
这项研究增强了4,4'-Methylenebis(N,N-diglycidylaniline) (AG80) 环氧树脂的性能.
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
- 纳米技术纳米技术
背景情况:
- 4,4'-Methylenebis(N,N-diglycidylaniline) (AG80) 是一种高性能耐热材料.
- 传统的硬化方法损害了AG80的强度.
- 开发用于同时增强强度和性的方法至关重要.
研究的目的:
- 为了协同增强AG80环氧树脂的强度和性.
- 为了研究相位结构修改对机械性能的影响.
- 为了提高AG80.0.的热稳定性.
主要方法:
- 用基终结聚烯西洛 (Z-6018) 和环氧兼容剂 (P/E30) 修改AG80.
- 使用FTIR,1H NMR,29Si NMR和环氧值定位进行表征.
- 使用SEM和AFM分析相位结构和机械性能.
主要成果:
- P/E30引入调节了相位结构,增强了性和强度.
- 在20重量%P/E30时,拉力强度增加了50.89%,冲击强度增加了454.79%,折断性增加了152.43%.
- P/E30在丰富的球形相内创造了双连续结构,改善了机械性能;Z-6018增强了热稳定性.
结论:
- 丰富的球体相内的双连续结构是改造AG80.0中优异机械性能的关键.
- 协同修改方法成功地平衡了强度和性.
- 这项研究为高性能环氧树脂的开发提供了一个有前途的战略.
相关概念视频
01:26Polymer Classification: Stereospecificity
2.6K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.6K
01:14Polymer Classification: Architecture
2.9K
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...
2.9K
02:38Structure and Nomenclature of Epoxides
6.9K
Cyclic ethers are heterocyclic compounds with an oxygen atom in the ring along with carbon atoms. They are named depending on the number of carbon atoms present in their ring system. Cyclic ethers with a three-membered ring system are called “oxirane”, four-membered ring systems as “oxetane”, five-membered ring systems as “oxolane”, and six-membered ring systems as “oxane”. The cyclic structure of these rings imposes angle strain, and this strain...
6.9K
02:24Acid-Catalyzed Ring-Opening of Epoxides
7.7K
Epoxides that are three-membered ring systems are more reactive than other cyclic and acyclic ethers. The high reactivity of epoxides originates from the strain present in the ring. This ring strain acts as a driving force for epoxides to undergo ring-opening reactions either with halogen acids or weak nucleophiles in the presence of mild acid. The acid catalyst converts the epoxide oxygen, a poor leaving group, into an oxonium ion, a better leaving group, making the reaction feasible. The...
7.7K
03:00Preparation of Epoxides
8.1K
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...
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...
8.1K
01:08Molecular Weight of Step-Growth Polymers
2.3K
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.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
2.3K