John Gillham

Professor John Gillham is a distinguished figure in the field of chemical engineering, particularly known for his pioneering work in polymer science. As an emeritus professor at the Chemical and Biological Engineering department of Princeton University, he has made significant contributions to the molecular design of engineering plastics, aiming to develop alternatives to traditional metal materials. His innovative approach has led to advancements in understanding and manipulating the properties of polymers, which are crucial for a wide range of industrial applications. One of Professor Gillham's notable achievements is the development of the torsional braid analyzer (TBA). This instrument, a freely oscillating torsion pendulum, is designed to characterize the mechanical response of small polymer samples, as little as 25 mg, across a broad temperature spectrum at approximately 1 Hz. The TBA stands out as the first commercial automated dynamic mechanical analyzer specifically for polymers, marking a significant milestone in the field of polymer characterization. In addition to his work with the TBA, Professor Gillham has made substantial contributions to the understanding of thermosetting polymers. He introduced the time-temperature-transformation (TTT) cure diagram, a tool that has become essential for delineating the boundaries between various states of thermosetting polymers during isothermal reactions. This diagram helps in identifying the transitions between liquid, sol/gel rubber, gel rubber, sol glass, sol/gel glass, gel glass, and char states, providing invaluable insights into the curing processes of these materials. Professor Gillham's research interests are broad and encompass several key areas of polymer science, including polymer characterization, properties, synthesis, processing, rheology, dynamics, and degradation. His work has not only advanced the scientific understanding of polymers but also has practical implications, influencing the development of new materials and technologies. Throughout his career, Professor Gillham has been dedicated to pushing the boundaries of polymer science, inspiring both his peers and students. His contributions have been recognized through various awards and honors, reflecting his impact on the field and his commitment to advancing chemical engineering. His legacy continues to influence the next generation of engineers and researchers, ensuring that his innovative spirit lives on in future developments.