一个全聚二二烯骨架化环氧树脂系统及其作为电子材料的基本特性
Yuqing Li1,2, Peng Zhao1, Xiongtao Ju1
1School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Rd, Zhenjiang, 212013, China. zhangjm@ujs.edu.cn.
Chemical communications (Cambridge, England)
|December 5, 2024
概括
开发了一种基于二cyclopentadiene (DCPD) 的新型低成本环氧系统. 这种DCPD环氧树脂具有卓越的热稳定性和低介电损耗,非常适合先进的电子应用.
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
- 电气工程 电气工程
背景情况:
- 商用环氧树脂,如双-A的二氧化乙,广泛使用,但价格昂贵.
- 对于要求高的应用,需要具有高热和电性能,具有成本效益的热固化材料.
研究的目的:
- 设计和合成使用二cyclopentadiene (DCPD) 的低成本环氧系统.
- 为了评估DCPD网络的环氧树脂的热和电性能.
- 评估其适用于高性能电子应用的适用性.
主要方法:
- 一个二cyclopentadiene (DCPD) 的联网环氧系统的合成.
- 基于 DCPD 的环氧树脂的固化.
- 热性质的表征,包括玻璃过渡温度 (Tg).
- 在10 GHz时测量散射系数.
主要成果:
- 开发的基于DCPD的环氧系统成本低.
- 固化树脂具有出色的热性能,其玻璃过渡温度 (Tg) 超过250°C.
- 在10GHz时实现了0.0065的低散射系数.
结论:
- DCPD联网的环氧系统为商业环氧树脂提供了一个可行的,具有成本效益的替代方案.
- 它的高热稳定性和优良的电绝缘性能使其成为高性能电子应用的有希望的材料.
相关概念视频
01:14Polymer Classification: Architecture
2.6K
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...
2.6K
01:17Thermal Electrocyclic Reactions: Stereochemistry
2.0K
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.
2.0K
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
2.3K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.3K
01:20Types of Step-Growth Polymers: Polyesters
2.2K
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...
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...
2.2K
01:18Aromatic Hydrocarbon Anions: Structural Overview
2.7K
Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous...
Due to the absence of continuous...
2.7K
01:28Stability of Conjugated Dienes
3.3K
Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
3.3K