Control of Polymer Properties by Entanglement: A Review,Macromolecular Materials and Engineering

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Control of Polymer Properties by Entanglement: A Review
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2021-09-15 , DOI: 10.1002/mame.202100536
De‐Chao Kong ₁ , Ming‐Hao Yang ₁ , Xue‐Song Zhang ₁ , Zu‐Chen Du ₁ , Qiang Fu ₁ , Xue‐Qin Gao ₁ , Jia‐Wei Gong ₂

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Chain entanglement, either cohesional or topological, distinguishes polymers from other engineering materials. It impedes the movement of molecular segments and influences the polymer rheology, morphology, and mechanical properties. Although a high level of entanglement can increase the polymer toughness, excessive entanglement should be avoided because it causes a high melt viscosity making the processing difficult. This review tended to elucidate the influence of entanglement on the polymer structure, determining the material properties and processability. A wide range of methods used to fine control the degrees of chain entanglement are summarized. The methods are applicable to polymers in solutions, melts, and condensed states with advantages and limitations discussed in detail. The authors also examined the effect of the entanglement on polymer crystallizationâ€”the mechanism remains a controversial issue. This review will provide general guidance to designing and processing polymer materials with desired properties via a rational route of controlling the chain entanglement.

中文翻译：

通过纠缠控制聚合物性能：综述

内聚或拓扑的链缠结将聚合物与其他工程材料区分开来。它阻碍分子链段的运动并影响聚合物的流变学、形态和机械性能。虽然高水平的缠结可以增加聚合物的韧性，但应避免过度缠结，因为它会导致高熔体粘度，使加工变得困难。这篇综述倾向于阐明缠结对聚合物结构的影响，决定了材料性能和加工性能。总结了用于精细控制链缠结程度的多种方法。这些方法适用于溶液、熔体和凝聚态的聚合物，并详细讨论了其优点和局限性。作者还研究了缠结对聚合物结晶的影响——该机制仍然是一个有争议的问题。该综述将为通过控制链缠结的合理途径设计和加工具有所需特性的聚合物材料提供一般指导。

更新日期：2021-09-15

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