Manipulating bond exchange rates invitrimer-hexagonal boron nitride nanohybrids via heat capacity enhancement

Goh Munju; Shin Haeun; Kim Chae Bin

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Manipulating bond exchange rates invitrimer-hexagonal boron nitride nanohybrids via heat capacity enhancement

机译：通过热容量增强操纵债券交换率Invitrimer-六边形氮化物氮化物纳米胺

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Both thermoplastic and thermoset like vitrimers with dynamic covalent networks have been considered to be strong candidates as matrix materials for incorporating fillers to produce strong but also weldable, recyclable, and functional composites with light weight. As the bond exchange kinetics of dynamic covalent networks are a key factor governing macroscopic properties of vitrimers, substantial efforts have been devoted to manipulating the kinetics by synthesizing vitrimers equipped with new bond exchange chemistries. Here, a facile and synthesis-free approach to increasing the bond exchange rates of a model vitrimer, poly(hexahydrotriazine), is described. It was accomplished by simply incorporating a hexagonal boron nitride (hBN) filler. The incorporatedhBN effectively accelerated the thermally activated bond exchange reactions as evidenced by reduction in both activation energy and relaxation time.

机译：具有动态共价网络的热塑性和热固性玻璃聚合物都被认为是基体材料的有力候选材料，用于加入填料，以生产强度高、重量轻、可焊接、可回收和功能性复合材料。由于动态共价网络的键交换动力学是控制玻璃化物宏观性质的一个关键因素，因此通过合成配备了新键交换化学剂的玻璃化物来操纵动力学已经付出了大量的努力。本文描述了一种简便且无需合成的方法来提高模型玻璃化物聚六氢三嗪的键交换率。这是通过简单地加入六角氮化硼（hBN）填料实现的。掺入的DHBN有效地加速了热激活的键交换反应，这可以通过降低活化能和弛豫时间来证明。

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来源
《Journal of Applied Polymer Science》 |2021年第12期|共8页
作者
Goh Munju; Shin Haeun; Kim Chae Bin;
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作者单位

Konkuk Univ Dept Chem Engn Seoul South Korea;

Korea Inst Sci &

Technol KIST Inst Adv Composite Mat Wonju South Korea;

Pusan Natl Univ Dept Polymer Sci &

Engn Busan South Korea;

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原文格式 PDF
正文语种 eng
中图分类高分子化合物工业（高聚物工业）;
关键词
composites; thermoplastics; thermosets; vitrimers;

机译：复合材料;热塑性塑料;热固性塑料;virimers;

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Manipulating bond exchange rates invitrimer-hexagonal boron nitride nanohybrids via heat capacity enhancement

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