Towards the predictive design of PAEK-based polymers - from fundamental polymer physics to advanced materials applications

点击翻译按钮获取中文摘要

This project is focused on developing a predictive framework to control glass-formation and crystallization in polymers, with a particular focus on the efficient design of high performance polymers within the Poly Aryl Ether Ketone (PAEK) family. PAEK polymers are used in a broad range of applications including smart-phone speakers, electrical insulation, automotive gears, medical implants and aircraft components. The high temperature performance requirements of many PAEK polymer applications typically demand high glass transition temperatures (Tg), which in turn currently requires high melting points (Tm) and processing temperatures. However, we presently do not have sufficient fundamental understanding of glass-formation or crystallization in polymers to predict Tg or Tm from the structural molecular characteristics, as chosen during polymer synthesis. The goal in this project is thus to identify methods to control the balance of Tg and Tm. The physical properties including structure, dynamics and mechanics of PAEK polymers with systematically varied molecular building blocks will be investigated using a wide range of experimental techniques including calorimetry, dielectric relaxation spectroscopy, advanced rheology, scattering (light, x-rays, neutrons) and microscopy (light, electron). The results will be interpreted and analyzed in light of the current state-of-the-art knowledge of the glass transition and crystallization in polymers