Abstract

Reactive additives allow to adapt the properties of thermoplastic polymers during processing and for their later use. The chemical modification using multifunctional epoxide styrene-acrylic chain extenders (CE) in reactive processes is by now an established method to prevent degradation and to improve the process ability as well as the final properties of thermoplastics. One of the most common representatives of these CE is better known under its trade name Joncryl®. Since several years ago, Joncryl® ADR owes an ever-growing importance in industry and academia. It can be applied as reactive melt modifier for numerous polymers, mainly polyesters, where it largely affects the rheological properties and the thermal behavior. This review focuses on the reactive behavior of Joncryl® ADR as well as the induced changes in the rheological behavior of the polymers caused by this modification. The Joncryl® ADR incorporation leads to an increased shear viscosity, a higher melt strength and induces strain hardening due to the formation of branched chains and/or even crosslinking. The crystallization is also directly influenced by the changed chain topology. Eventually, this review article extensively addresses the benefits of using Joncryl® for processing such as stabilization, recycling, foaming, and polymer blending.

摘要

反应性添加剂允许在加工过程中调整热塑性聚合物的特性并用于以后的使用。在反应过程中使用多功能环氧化物苯乙烯-丙烯酸扩链剂 (CE) 进行化学改性是目前已确立的防止降解和提高加工能力以及热塑性塑料最终性能的方法。这些 CE 最常见的代表之一以其商品名 Joncryl® 更为人所知。自几年前以来，Joncryl® ADR 在工业界和学术界的重要性日益增加。它可用作多种聚合物（主要是聚酯）的反应性熔体改性剂，在很大程度上影响流变性能和热行为。本综述重点关注 Joncryl® ADR 的反应行为以及由此改性引起的聚合物流变行为的诱导变化。Joncryl® ADR 的加入导致剪切粘度增加，熔体强度更高，并由于支链的形成和/或什至交联而引起应变硬化。结晶也直接受到改变的链拓扑结构的影响。最后，这篇评论文章广泛讨论了使用 Joncryl® 进行加工的好处，例如稳定、回收、发泡和聚合物共混。结晶也直接受到改变的链拓扑结构的影响。最后，这篇评论文章广泛讨论了使用 Joncryl® 进行加工的好处，例如稳定、回收、发泡和聚合物共混。结晶也直接受到改变的链拓扑结构的影响。最后，这篇评论文章广泛讨论了使用 Joncryl® 进行加工的好处，例如稳定、回收、发泡和聚合物共混。