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相关概念视频

Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

2.5K
Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
2.5K
Polymer Classification: Architecture01:14

Polymer Classification: Architecture

2.7K
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...
2.7K
Polymers02:34

Polymers

35.8K
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
35.8K
Characteristics and Nomenclature of Homopolymers01:00

Characteristics and Nomenclature of Homopolymers

3.0K
Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
3.0K
Types of Step-Growth Polymers: Polyesters01:20

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...
2.2K
Ion Exchange01:17

Ion Exchange

593
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
593

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相关实验视频

Updated: Jul 7, 2025

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
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Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application

Published on: March 8, 2019

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聚氨酸和聚乙烯氧化物) 多块共聚合物网络:与聚二氧化交叉连接,再加工和固体聚电解质特性.

Lei Li1, Bingjie Zhao1, Guohua Hang1

  • 1Department of Polymer Science and Engineering and the State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China.

Polymers
|December 23, 2023
PubMed
概括

新的聚氨酸-聚乙烯 (乙氧化) 网络提供了出色的再加工,可以转化为可回收的固体聚合物电解质,具有良好的离子导电性.

关键词:
离子导电性的离子导电性.网络 网络 网络 网络 网络 网络聚乙烯氧化物) 的存在.聚氧氨基乙 (polyhydroxyurethane) 是一种多氧氨基乙.再加工的特性.乙烯结合的转基因发生.

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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
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相关实验视频

Last Updated: Jul 7, 2025

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
11:49

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application

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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

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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-无机混合材料 有机-无机混合材料

背景情况:

  • 聚氨酸 (PHU) 以其可调节的特性而闻名.
  • 聚乙烯氧化物 (PEO) 在聚合物电解质中广泛使用.
  • 开发可回收和再加工的聚合物网络仍然是一个挑战.

研究的目的:

  • 合成新型的多氧氨-多乙烯氧化物 (PHU-PEO) 多块共聚合物网络.
  • 调查这些网络的再处理特性.
  • 探索它们作为固体聚合物电解质的潜力.

主要方法:

  • 步骤增长聚合 bis ((6个成员的循环碳酸盐) 与 α,ω-氨基末的 PEOs.
  • PHU-PEO共聚合物的功能化与3 - 异二四三西西兰 (IPTS).
  • 通过水解和凝结三氧化西兰部分的交联,形成聚二氧化 (PSSQ) 网络.
  • 添加三甲硫酸盐 (LiOTf) 形成固体聚合物电解质.

主要成果:

  • 合成的PHU-PEO网络表现出出色的再加工特性,由乙烯键的转化促进,导致较低的再加工温度与传统的PHU网络相比.
  • 通过结合LiOTf,通过抑制PEO链结晶,可以成功地将网络转化为固体聚合物电解质.
  • 由此产生的固体聚合物电解质表现出良好的离子导电性 (7.64 × 10-5 S × cm-1 在 300 K) 并在再加工后保持其导电性,表明可回收.

结论:

  • 与PSSQ交联的PHU-PEO多块共聚合物网络为可再加工材料提供了一个有前途的平台.
  • 这些网络可以有效地用作可回收的固体聚合物电解质,具有理想的离子导电性.
  • 纳入PSSQ和乙烯键的转化是实现增强再加工和电解质性能的关键.