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相关概念视频

General Properties of Solutions02:12

General Properties of Solutions

35.7K
Many common substances around us exist as a solution, such as ocean water, air, and gasoline. All solutions are mixtures of substances that are composed of varying amounts of two or more types of atoms or molecules. A mixture with a non-uniform composition is a heterogeneous mixture, whereas a mixture with a uniform composition is a homogeneous mixture. The components that make the homogeneous mixture are evenly spread out and thoroughly mixed. 
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Properties of Continuous Functions01:29

Properties of Continuous Functions

179
Continuous functions exhibit smooth, uninterrupted behavior, and combining them through standard operations retains this continuity. If f and g are continuous at a point a, then the functions f+g, f-g, cf (where c is a constant), fg, and fg (provided g(a)a) are also continuous at a. This allows the construction of complex functions from simpler continuous parts without losing smoothness.Polynomials, which are expressions formed by sums of powers of x with constant coefficients, are continuous...
179
High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

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In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
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Composition of Polyprotic Acid Solutions as a Function of pH01:19

Composition of Polyprotic Acid Solutions as a Function of pH

862
Polyprotic acids of the type H2M constitute two ionizable protons. As a result, on titration with a base, they exhibit two equivalence points in the titration curve. During titration, the species H2M, HM−, and M2− will be present in the solution at different points. The fractions of H2M, HM−, and M2− present at the various instances of the titration are denoted by α0, α1, and α2, respectively.
A graph with the alpha values is plotted against the volume of...
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Enthalpy of Solution02:39

Enthalpy of Solution

30.4K
There are two criteria that favor, but do not guarantee, the spontaneous formation of a solution:
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Performing a Simple Data Analysis using MS-Excel Function01:17

Performing a Simple Data Analysis using MS-Excel Function

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Microsoft Excel offers a suite of functions and tools ideal for statistical analysis, making it accessible to students and researchers. This article outlines fundamental Excel functions pivotal for data analysis.
SUM: This function calculates the total sum of a range of values. It's the foundation for aggregating data, essential for determining overall trends and totals in datasets.
AVERAGE: It computes the mean value of a given set of numbers, providing a quick insight into the central...
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Updated: Jan 29, 2026

Solution-Processed "Silver-Bismuth-Iodine" Ternary Thin Films for Lead-Free Photovoltaic Absorbers
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通过功能化的环二胺来定制性能,以解决可加工的高性能聚胺薄膜.

Lei Xiong1,2, Feiyan Ding1,3, Liangrong Li4

  • 1School of Pharmacy, Nanchang Medical College, Nanchang 330052, China.

Polymers
|January 28, 2026
PubMed
概括

一种新的化二胺单体被合成并聚合成高性能聚胺薄膜. 这些先进的材料具有出色的溶解性,疏水性,透明性和热稳定性,适用于灵活的电子产品.

关键词:
乙烯基循环二胺是一种高性能的电影高性能电影.疏水性是指对水的疏水性.可以处理的解决方案-可加工.结构财产关系的结构.

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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
  • 有机合成 有机合成

背景情况:

  • 高性能聚合物对于先进的电子应用至关重要.
  • 开发新的单体是定制聚合物特性的关键.
  • 化聚胺具有独特的特性,但经常面临加工挑战.

研究的目的:

  • 合成一种具有特定结构特征的新型化二胺单体 (NFDA).
  • 通过将NFDA与商业二氧化化物聚合,创建一系列聚胺薄膜.
  • 评估由此产生的聚胺在灵活电子和光伏领域的潜在应用方面的特性.

主要方法:

  • 合成了4,4'-((双环[2.2.1]-5--2,3-二甲基 (甲)) (乙氧)) (乙氧)) (乙氧)) (乙氧)) (三) (三甲) (亚尼林) (NFDA) 单体.
  • 聚合NFDA与六种商业二化物,形成聚氨酸前体.
  • 热影像化,将前体转化为聚胺薄膜.
  • 薄膜的特性,包括溶解性,疏水性,光学透明性,热稳定性和机械强度.

主要成果:

  • 成功合成了NFDA单体,其中包括一个环性诺博南核,以太链接和三甲基组.
  • 聚胺薄膜在各种有机溶剂中表现出极好的溶解性,这表明解决方案可加工性优越.
  • 这些薄膜表现出高水性 (接触角度高达109.4°),最小的吸水率 (0.26%) 和高光学透明度 (86.7%的透射率).
  • 观察到异常的热稳定性,5%的质量损失温度高于416°C,以及良好的机械性能.

结论:

  • NFDA的理性分子设计导致具有突出的特性组合的聚胺.
  • 这些新型聚胺克服了与化聚合物相关的典型加工限制.
  • 这些材料对下一代灵活的电子产品和先进的光伏设备非常有希望.