Toughening of Epoxy Systems with Interpenetrating Polymer Network (IPN): A Review.
Toughening of Epoxy Systems with Interpenetrating Polymer Network (IPN): A Review.
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DOI：
10.3390/polym12091908
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发表时间：
2020-08-24
期刊：
影响因子：
5
通讯作者：
Dransfeld C
中科院分区：
文献类型：
--
作者：
Farooq U;Teuwen J;Dransfeld C
环氧树脂广泛用于不同的商业应用，特别是在航空航天工业中作为基体碳纤维增强聚合物复合材料。这是由于它们具有优异的性能，即易于加工、成本低、机械性能、热性能和电性能优异。然而，纯环氧体系具有一些固有的缺点，例如脆性和固化后伸长率低，限制了复合材料的性能。人们已经探索了几种增韧环氧树脂体系的方法，其中互穿聚合物网络（IPN）的形成越来越受到关注。这种方法通常会导致改性环氧体系具有更好的机械性能（例如断裂韧性）。理想情况下，互穿网络会产生两种不同聚合物所需性能的协同组合，即增韧剂提高韧性，而热固性材料则导致高使用温度。三个主要参数影响 IPN 增韧体系的机械响应：(i) 成分的化学结构，(ii) 增韧剂含量，最后 (iii) 所得形态的类型和规模。存在多种用于创建 IPN 的合成路线，提供了不同的 IPN 结构控制方式，并且还提供了用于制造复合材料的不同加工路线。本次综述的目的是概述当前通过使用热塑性塑料或热固性塑料形成 IPN 结构来增韧环氧基体系统的最新技术。此外，还探索了基于 IPN 的环氧树脂体系在形成复合材料（特别是航空航天应用）方面的潜力。
Epoxy resins are widely used for different commercial applications, particularly in the aerospace industry as matrix carbon fibre reinforced polymers composite. This is due to their excellent properties, i.e., ease of processing, low cost, superior mechanical, thermal and electrical properties. However, a pure epoxy system possesses some inherent shortcomings, such as brittleness and low elongation after cure, limiting performance of the composite. Several approaches to toughen epoxy systems have been explored, of which formation of the interpenetrating polymer network (IPN) has gained increasing attention. This methodology usually results in better mechanical properties (e.g., fracture toughness) of the modified epoxy system. Ideally, IPNs result in a synergistic combination of desirable properties of two different polymers, i.e., improved toughness comes from the toughener while thermosets are responsible for high service temperature. Three main parameters influence the mechanical response of IPN toughened systems: (i) the chemical structure of the constituents, (ii) the toughener content and finally and (iii) the type and scale of the resulting morphology. Various synthesis routes exist for the creation of IPN giving different means of control of the IPN structure and also offering different processing routes for making composites. The aim of this review is to provide an overview of the current state-of-the-art on toughening of epoxy matrix system through formation of IPN structure, either by using thermoplastics or thermosets. Moreover, the potential of IPN based epoxy systems is explored for the formation of composites particularly for aerospace applications.
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