Perfluoropyridine as a Scaffold for Semifluorinated Thiol‐ene Networks with Readily Tunable Thermal Properties,Macromolecular Chemistry and Physics

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Perfluoropyridine as a Scaffold for Semifluorinated Thiol‐ene Networks with Readily Tunable Thermal Properties
Macromolecular Chemistry and Physics ( IF 2.5 ) Pub Date : 2020-05-27 , DOI: 10.1002/macp.202000100
Levi M. J. Moore ₁ , Kevin T. Greeson ₂ , Kevin A. Stewart ₃ , Daniel A. Kure ₃ , Cynthia A. Corley ₃ , Abby R. Jennings ₃ , Scott T. Iacono ₃ , Kamran B. Ghiassi ₁

Affiliation

Two new trifunctional alkene monomers based on the highly modular perfluoropyridine scaffold are synthesized with an aliphatic and an aromatic moiety, 4‐penten‐1‐ol and eugenol, respectively. The monomers are the basis for thiol‐ene thermoset materials, formulated against a difunctional or trifunctional thiol. Systems based on these novel monomers have a wide range of thermal properties, with glass transition temperatures (T_gs) spanning from −42 to 21 °C. Mixed systems obey the Fox equation, and T_gs of the mixtures can be tuned to specific values in that range. Thermal degradation temperatures follow a similar trend, with decomposition temperatures ranging from 274 to 348 °C in nitrogen with varying compositions having tailorability therein. This new class of semifluorinated thermoset materials with tunable thermal properties has several potential applications within the aerospace industry, such as sealants and coatings, where stability and survivability at high temperatures in harsh environmental conditions are imperative.

中文翻译：

全氟吡啶作为具有容易调节的热性质的半氟化硫代烯烃网络的支架

合成了两种基于高度模块化全氟吡啶骨架的新型三官能烯烃单体，分别具有脂族和芳族部分，分别是4-戊烯-1-醇和丁香酚。单体是针对双官能或三官能硫醇配制的硫醇烯热固性材料的基础。基于这些新型单体的系统具有广泛的热性能，玻璃化转变温度（T _g s）介于-42至21°C之间。混合系统服从Fox方程，T _gs的混合物可以调整到该范围内的特定值。热降解温度遵循相似的趋势，在氮气中的分解温度范围为274至348℃，其中不同的成分在其中具有可定制性。这种新型的具有可调热性能的半氟化热固性材料在航空航天工业中具有多种潜在的应用，例如密封剂和涂料，在高温和恶劣的环境条件下，其稳定性和耐久性至关重要。

更新日期：2020-05-27

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