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Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

2.6K
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...
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Free-Radical Chain Reaction and Polymerization of Alkenes02:35

Free-Radical Chain Reaction and Polymerization of Alkenes

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The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
8.4K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

1.4K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
1.4K
Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

3.5K
Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
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Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

1.8K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
1.8K
Polymers02:34

Polymers

32.5K
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...
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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by &#960;-&#960; Stacking Interactions
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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Published on: October 10, 2016

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ブロックコポリマーテンプレートを用いてトポケミカルポリメリゼーションを工学化します.

Liangliang Zhu1, Helen Tran, Frederick L Beyer

  • 1Department of Chemistry, Columbia University , New York, New York 10027, United States.

Journal of the American Chemical Society
|September 12, 2014
PubMed
まとめ
この要約は機械生成です。

研究者は,ディフェニルディアセチレンモノマーとブロックコポリマーテンプレートを使用して,急速な固体ポリメリゼーションのための新しい方法を開発しました. この技術は,高度なアプリケーションのための光ポリメリ化材料の効率的な作成を可能にします.

さらに関連する動画

Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
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Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
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Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization

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

  • マテリアルサイエンス 材料科学
  • ポリマー化学のポリマー化学について
  • ナノテクノロジー ナノテクノロジー

背景:

  • 固体ポリメリゼーションは,オーダーされたポリマー構造を作成するための利点を提供します.
  • 溶液処理による薄膜のポリメリゼーションの制御は依然として課題です.
  • 超分子組成は,材料における化学反応を直接制御することができる.

研究 の 目的:

  • 固体状態におけるトポケミカルポリメリゼーションの迅速かつ効率的な方法を開発する.
  • ブロックコポリマーを使用して,超分子テンプレートによる光ポリメリ化可能な材料を作成します.
  • 結合ポリマー薄膜の溶液ベースの処理を可能にするために.

主な方法:

  • ディフェニルディアセチレンモノマーとポリ (スタイレン-b-アクリル酸) ブロックコポリマーテンプレートの統合.
  • トポケミカル光ポリメリゼーションをテンプレートするために非共性相互作用を利用する.
  • 薄膜加工と,ポリメリゼーションとマイクロパターニングのための紫外線曝露.

主要な成果:

  • ブロックコポリマーマイクロフェーズ分離強化ポリメリゼーションによるダイアセチレンモノメアの階層的な自己組み立て.
  • 完全なトポケミカル光ポリメリゼーションは,紫外線曝露の20秒以内に達成されます.
  • ポリディフェニルディアセチレン (PDPDA) デリバティブの同時光ポリメリゼーションとマイクロパターニングは,UV活性クロスリンク可能なグループを使用します.

結論:

  • 開発された戦略は,迅速で,溶液処理可能で,超分子的にテンプレートされた固体ポリメリゼーションを可能にします.
  • この方法は,階層的な構造を持つポリディフェニルジアセチレン誘導体の効率的な生成を可能にします.
  • センサーと柔軟な結合材料の微細製造における潜在的な応用.