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相关概念视频

Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

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Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
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相关实验视频

Updated: Sep 19, 2025

Drawing and Hydrophobicity-patterning Long Polydimethylsiloxane Silicone Filaments
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在聚甲基氧化瓶刷弹性体中的凝动力学.

Sarah Barber1, Ejajul Hoque2, Kyujin Ko1

  • 1Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH, 45221, USA.

Macromolecular rapid communications
|June 10, 2025
PubMed
概括

瓶刷弹性体中的网络形成是独立于固化率的,揭示了侧链如何影响网络结构和动态在各种应用程序的加工过程中.

关键词:
瓶子刷子 瓶子刷子 瓶子刷子治疗治疗治疗治疗治疗治疗弹性体的弹性体是什么剪切类风湿学 剪切类风湿学

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Last Updated: Sep 19, 2025

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科学领域:

  • 聚合物科学 聚合物科学
  • 材料科学 材料科学 材料科学
  • 类风病学 类风病学 类风病学

背景情况:

  • 瓶架构,以接种的侧链为特征,提供独特的无纠性质.
  • 弹性体中的网络形成涉及交叉连接器和聚合物链之间的复杂相互作用.
  • 了解这些过程对于设计先进的弹性体材料至关重要.

研究的目的:

  • 为了研究带有移植侧链的弹性体中的网络形成 (瓶架构).
  • 了解反应动力学和硬质效应对网络透的影响.
  • 分析侧链对聚合物网络粘弹性和内部结构的影响.

主要方法:

  • 时间解析的风湿学被用来测量在催化固化过程中不断变化的粘弹性.
  • 调整了催化剂度,以研究反应动力学对sol-gel过渡的影响.
  • 时间治愈叠加被应用来量化前和后凝状态的动态.

主要成果:

  • 在瓶和线性系统中,发现网络形成独立于治愈率.
  • 侧链显著减少了关键凝集群的碎形维度.
  • 凝点周围的转移因子的分歧和崩表明了普遍性,独立于治疗动力学.

结论:

  • 这项研究阐明了瓶弹性质的无纠性质及其独特的网络形成途径.
  • 反应动力学和固体效应极大地影响了网络的透和结构.
  • 这些发现对于在各种领域应用瓶刷弹性体至关重要.