树脂/金属氧化物复合材料的稳定性资格,用于表面氧化保护
Traian Zaharescu1,2, Radu Mirea3, Tunde Borbath2
1INCDIE-ICPE CA, Radiochemical Center, 313 Splaiul Unirii, Ro 030138 Bucharest, Romania.
Polymers
|February 10, 2024
概括
玛辐射加速了酸树脂的降解. 无机氧化物增强了对放射溶解的耐热性和激活能量,改善了辐射下的材料稳定性.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 辐射化学 辐射化学
背景情况:
- 阿尔基德树脂在各种环境条件下容易降解.
- 了解玛辐射的影响对于预测材料寿命至关重要.
- 化学发光是一种敏感的技术,用于研究降解机制.
研究的目的:
- 为了研究由玛辐射诱导的酸树脂加速降解.
- 为了评估无机氧化物对树脂辐射稳定的影响.
- 在非同热条件下阐明降解机制.
主要方法:
- 使用非异热化学发光测量方法.
- 样品受到不同剂量的玛辐射.
- 用热重力测量分析来评估热稳定性.
- 计算了氧化降解的激活能量.
主要成果:
- 玛辐射显著加快了酸树脂的降解.
- 无机氧化物的存在增加了热电阻和激活能量.
- 与未被辐射的样本相比,被辐射的样本表现出较低的化学发光强度.
- 辐射样本的氧化开始温度被观察到约为75°C.
结论:
- 无机氧化物作为稳定剂,增强酸树脂的抗辐射能力.
- 降解机制涉及降解和交联过程之间的竞争.
- 马辐射改变了化学发光的特征,表明了降解途径的变化.
相关概念视频
02:49Corrosion
The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...
02:58Properties of Transition Metals
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
01:09Complexation Equilibria: Factors Influencing Stability of Complexes
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...