马来酰亚胺
点击化学
热固性聚合物
硫醇
材料科学
硫醚
高分子化学
玻璃化转变
聚合物
化学
有机化学
复合材料
作者
Shelbi Parker,Radu Reit,Haley Abitz,G ELLSON,Kejia Yang,Benjamin Lund,Walter Voit
标识
DOI:10.1002/marc.201600033
摘要
Thiol‐click reactions lead to polymeric materials with a wide range of interesting mechanical, electrical, and optical properties. However, this reaction mechanism typically results in bulk materials with a low glass transition temperature ( T g ) due to rotational flexibility around the thioether linkages found in networks such as thiol‐ene, thiol‐epoxy, and thiol‐acrylate systems. This report explores the thiol‐maleimide reaction utilized for the first time as a solvent‐free reaction system to synthesize high‐ T g thermosetting networks. Through thermomechanical characterization via dynamic mechanical analysis, the homogeneity and T g s of thiol‐maleimide networks are compared to similarly structured thiol‐ene and thiol‐epoxy networks. While preliminary data show more heterogeneous networks for thiol‐maleimide systems, bulk materials exhibit T g s 80 °C higher than other thiol‐click systems explored herein. Finally, hollow tubes are synthesized using each thiol‐click reaction mechanism and employed in low‐ and high‐temperature environments, demonstrating the ability to withstand a compressive radial 100 N deformation at 100 °C wherein other thiol‐click systems fail mechanically. image
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