Evading the strength–ductility trade-off dilemma of rigid thermosets by incorporating triple cross-links of varying strengths,Polymer Chemistry

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Evading the strength–ductility trade-off dilemma of rigid thermosets by incorporating triple cross-links of varying strengths
Polymer Chemistry ( IF 4.1 ) Pub Date : 2020-09-01 , DOI: 10.1039/d0py00928h
Cheng Wang _{1,

2,

3,

4} , Shuai Zhang _{1,

2,

3,

4} , Longfei Zhang _{1,

2,

3,

4,

5} , Yewei Xu _{3,

4,

5,

6} , Lin Zhang _{1,

2,

3,

4}

Affiliation

Synchronously improving the mechanical strengths and ductility of rigid thermoset materials is a difficult and long-standing problem in polymer science. Inspired by mussel byssal threads, this study proposes a new class of rigid thermosets composed of three types of cross-links. Two of these cross-links are formed from reversible hydrogen bonds of varying strengths, and the third is constructed from covalent bonds. Synergetic interplay among the hierarchical hydrogen bonds enhances the speed and efficiency of energy dissipation of polymer networks. Consequently, the coexisting covalent cross-links and hierarchical hydrogen bonds simultaneously improve both the strength and ductility of the polymer materials, thus avoiding the strength–ductility trade-off dilemma.

中文翻译：

通过合并不同强度的三重交联键，避免了刚性热固性塑料的强度-延展性折衷的困境

在聚合物科学中，同步提高刚性热固性材料的机械强度和延展性是一个困难而长期存在的问题。受到贻贝基底线的启发，这项研究提出了一种由三类交联组成的新型刚性热固性材料。这些交联中的两个由强度不同的可逆氢键形成，第三个由共价键构成。分层氢键之间的协同相互作用提高了聚合物网络能量消散的速度和效率。因此，共存的共价交联键和分级氢键同时提高了聚合物材料的强度和延展性，从而避免了强度-延展性之间的权衡难题。

更新日期：2020-10-13

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