Study on the properties of ethylenebisformamide plasticized corn starch (EPTPS) with various original water contents of corn starch

EPTPSs were prepared based on various original water contents of corn starch (10%, 13%, 16% and 19%). The structure and mechanical performance of resulting TPSs were studied in detail. The hydrogen bond between plasticizer and starch was detected by FT-IR. By scanning electron microscope (SEM), native corn starch granules were proved to transfer to a continuous phase. The crystallinity and retrogradation of EPTPSs were studied by X-ray diffraction (XRD). The effect of water on the mechanical properties of EPTPSs was also tested. The effect of moisture content on the glass–rubber transition temperature (Tg) was studied using dynamic thermal mechanical analysis (DMTA). It revealed that Tg of EPTPS decreased with increasing moisture content.