Dynamically Cross-Linked Polydimethylsiloxane Networks with Ambient-Temperature Self-Healing,Macromolecules

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Dynamically Cross-Linked Polydimethylsiloxane Networks with Ambient-Temperature Self-Healing
Macromolecules ( IF 5.1 ) Pub Date : 2015-12-11 00:00:00 , DOI: 10.1021/acs.macromol.5b01666
Willi Schmolke _{1,

2} , Norman Perner ₃ , Sebastian Seiffert _{1,

2}

Affiliation

Dynamically cross-linked polymer networks have promising potential to serve as self-healing materials, but this is often limited to occur at elevated temperature. We overcome this limitation by refinement of an earlier approach to synthesize dynamically cross-linked polydimethylsiloxane networks such to show stress relaxation and self-healing at room temperature on short time scales, which we probe by oscillatory shear rheology and piercing experiments. Our studies reveal a direct correlation between the amount of anionic groups in the polymer networks and their stress-relaxation and self-healing rates, allowing these materials to be designed in a rational fashion.

中文翻译：

具有环境温度自修复功能的动态交联聚二甲基硅氧烷网络

动态交联的聚合物网络具有有望用作自修复材料的潜力，但通常仅限于在高温下发生。我们通过改进早期方法来合成动态交联的聚二甲基硅氧烷网络，从而克服了这一局限，例如在室温下以短时间尺度显示应力松弛和自我修复，我们通过振荡剪切流变学和穿孔实验对其进行了探索。我们的研究揭示了聚合物网络中阴离子基团的数量与其应力松弛和自愈速率之间的直接相关性，从而使这些材料能够以合理的方式进行设计。

更新日期：2015-12-11

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