PA66 is an important engineering plastic in our daily life due to its efficacious properties. In order to expand the potential applications of this polymer, two different molecular weight 6I6T copolymers were melt-blended with PA66 to modify its crystallization kinetics. The crystallization kinetics of the PA66 6I6T blends in a wide-temperature range were studied using fast scanning calorimetry (FSC). It has been discovered that the crystallization kinetics of both blends are prone to slow down considerably the higher the 6I6T concentration becomes in both series. In one of the blend series that uses a higher mw 6I6T copolymer, the bimodal kinetics of PA66 tend to shift to unimodal crystallization kinetics as the concentration of 6I6T increases. Unlike its counterpart, the lower mw blend has bimodal kinetics that remains consistent for the duration of the entire series. An integrated fast scanning calorimetry chip system was utilized throughout this experiment to perform repeatable non-damaging Fourier-transform infrared spectroscopy (FTIR), and atomic force microscope (AFM) characterization to examine possible polymorphism transition and morphology change. The reasons that lead to the changes in crystallization kinetics of PA66 and its blends will be further discussed.

Investigating the crystallization kinetics of PA66/ 6I6T blends using integrated fast scanning calorimetry chip system

ACS Spring 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.