Toughening Rigid Epoxy Using Novel Potassium Silanolate Ionic Interactions,Macromolecular Materials and Engineering

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Toughening Rigid Epoxy Using Novel Potassium Silanolate Ionic Interactions
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2019-12-29 , DOI: 10.1002/mame.201900535
Xiao Wu _{1,

2,

3} , Xin Yang ₁ , Xiao‐Biao Zuo ₄ , Ran Yu ₁ , Xiao‐Juan Zhao ₁ , Ying Zhang ₁ , Wei Huang _{1,

2}

Affiliation

A rigid and densely cross‐linked epoxy resin is successfully toughened by introducing novel potassium silanolate ionic interactions, exhibiting simultaneous improvement in toughness, strength, modulus, and glass transition temperature. The ionic interactions are incorporated through a simple way into epoxy cured with a novel potassium silanolate ionic groups‐containing amine curing agent. Small angle X‐ray scattering/wide angle X‐ray scattering and dynamic thermomechanical analysis results show that the ionic groups aggregated into multiplets and clusters in the prepared epoxy ionomers. The temporary physical cross‐link effect of ionic aggregates and the consequently formed chain‐restricting ionomeric nanodomains account for the stiffening and toughening performance. Furthermore, the densely cross‐linked epoxy ionomers possess high stretchability at elevated temperature (about 800% at 200 °C) due to the dynamic ion‐hopping effect.

中文翻译：

使用新型硅烷醇钾离子相互作用增韧硬质环氧树脂

刚性和致密交联的环氧树脂通过引入新型的硅烷醇钾离子相互作用成功地增韧，同时显示出韧性，强度，模量和玻璃化转变温度的同时提高。离子相互作用通过一种简单的方法结合到使用新型含硅烷醇钾离子基团的胺固化剂固化的环氧树脂中。小角X射线散射/广角X射线散射和动态热力学分析结果表明，在制备的环氧离聚物中，离子基团聚集成多重峰和簇。离子聚集体的临时物理交联效应以及由此形成的链限制离聚物纳米域可解释其增韧性能。此外，

更新日期：2020-02-14

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