制备单二甲基乙烯终结聚氧流体及其在热接口材料中的应用
Yang Liu1, Xu Long1, Yang Wang1
1College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, China.
Polymers
|August 26, 2023
概括
合成和功能化了具有量身定制结构的新流体,用于对化 (AlN) 颗粒的表面处理. 这改善了基基板中的AlN分散,增强了和中的热传递.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
背景情况:
- 聚氧是具有可调节性质的多功能聚合物.
- 像化 (AlN) 这样的陶填料的有效分散对于先进的材料性能至关重要.
- 填充剂的表面修改是实现良好的分散和界面兼容性的关键.
研究的目的:
- 合成具有特定终端组功能的新型聚氧流体.
- 为了使这些聚氧作为AlN颗粒的现场表面处理剂发挥作用.
- 研究聚氧结构对AlN分散和复合材料的热性能的影响.
主要方法:
- 阴离子催化不平衡聚合物合成量身定制的聚氧.
- 使用卡斯特德特催化剂进行末端组修饰的水化反应.
- 现场处理AlN颗粒的表面,使用功能化的聚烯酸.
- 在矩阵中评估AlN分散和导热性.
主要成果:
- 成功合成了各种α-trimethylsilylmethyl-ω-dimethylsilyl终结的多氧及其三氧乙烯衍生物.
- 证明了功能化聚氧作为AlN颗粒的现场表面处理剂的有效性.
- 观察到在聚烯基基矩阵中改善了AlN的分散,在糊和中提高了热传递性能.
结论:
- 合成的聚氧有效地改变了AlN颗粒的表面,促进了更好的分散.
- 聚氧的结构变化影响了复合材料的界面特性,从而影响了复合材料的导热性.
- 这些发现为开发先进的导热基材料提供了途径.
相关概念视频
01:17Thermal Electrocyclic Reactions: Stereochemistry
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
01:20Types of Step-Growth Polymers: Polyesters
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
01:16Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...