生物基聚胺的光学,电介质和热性质来源于含有异酸盐的二胺
Yoshiyuki Tsurusaki1, Ririka Sawada1, Haonan Liu1
1Department of Chemical Science and Engineering, Institute of Science Tokyo, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo, 152-8552, Japan.
Macromolecular rapid communications
|February 9, 2025
概括
新的植物性聚胺 (PI) 来自异化物 (ISS) 提供优良的光学和介电性质,具有高的热稳定性. 这些功能性聚合物增强自由体积,减少相互作用,使它们适合先进的应用.
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
- 有机化学 有机化学
背景情况:
- 来自植物来源的可持续,碳中和聚合物的需求日益增长.
- 需要先进的功能性聚合物,具有量身定制的光学,热和介电性质.
研究的目的:
- 合成和描述含有二胺基聚合物 (ISSD-PI) 的新型半环性异索化物.
- 研究ISSD-PI关于光学,热和介电性能的结构属性关系.
- 评估ISS作为高性能聚合物的生物基建构件的潜力.
主要方法:
- 通过将异化物 (ISS) 纳入二胺部分,合成六种不同的ISSD-PI.
- 光学属性的表征 (透明度,折射率,双折).
- 热分析 (玻璃过渡温度,分解温度) 和介电测量.
主要成果:
- 在ISSD-PI中,光学透明度很好,折射率很低 (1.554-1.633).
- 观察到较低的双断率 (0.0084-0.0348) 和介电常数 (2.93-3.36).
- 高热稳定性,玻璃过渡温度>250°C和分解温度>400°C.
- 维持了国际空间站骨架的性,显示了圆形的二重化.
结论:
- 将ISS纳入聚胺链中可以提高光学和介电性质,同时保持热稳定性.
- 增加的自由体积和减少的分子间相互作用有助于改善性能.
- 材料属性受到化部分的刚度的影响比胺部分的更大.
更多相关视频
11:49Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
Published on: March 8, 2019
12.5K
09:09Synthesis of PolyN-isopropylacrylamide Janus Microhydrogels for Anisotropic Thermo-responsiveness and Organophilic/Hydrophilic Loading Capability
Published on: February 27, 2016
9.9K
相关概念视频
Polymer Classification: Stereospecificity
2.4K
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...
2.4K
Types 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
Polymer Classification: Crystallinity
2.8K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
2.8K
Polymer 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
