Crystallization Behaviors of Composites Comprising Biodegradable Polyester and Functional Nucleation Agent

Abstract

In this study, a thorough study of the crystallization behaviors of the biodegradable polymer composites of poly(ethylene succinate) (PESu) and hexagonal boron nitride (h-BN) was carried out. We found that h-BN had a significant nucleation effect on crystallization behaviors. DSC isothermal crystallization results demonstrated that the crystallization time of the PESu/h-BN composites became shorter after adding h-BN. The rate constant k values calculated from the Avrami equation were larger for the composites, demonstrating that PESu’s crystallization rate was increased by adding h-BN. TEM and SEM images showed the well-dispersed h-BN in the PESu matrix. Optical microscopy revealed that the PESu/h-BN composites formed more and smaller spherulites than neat PESu did, which confirmed that h-BN caused the nucleation effect. H-BN also accelerated non-isothermal crystallization kinetics. We discussed the behaviors of the Mo model, which demonstrated that h-BN promoted the kinetics of non-isothermal crystallization. The XRD diffraction patterns showed that h-BN in the composites would not obviously change the crystalline structure of PESu.

Characterization of eco‐friendly composites for automotive applications prepared by the compression molding method

“…They experienced cold crystallization, which is a phenomenon in which crystallization along with an exothermal phase occurs when the material is heated at a temperature below its melting point but above its Tg temperature. On the curve, the peak point of the curve after the Tg phase is called Tc (Temperature of crystallization), which is the transition temperature at which crystalline structures begin to form due to heating 81 . The resulting Tc of specimens BP_10, BP_20, and BP_30 was 497.7, 495.57, and 521.40°C, respectively.…”

“…On the curve, the peak point of the curve after the Tg phase is called Tc (Temperature of crystallization), which is the transition temperature at which crystalline structures begin to form due to heating. 81 The resulting Tc of specimens BP_10, BP_20, and BP_30 was 497.7, 495.57, and 521.40 C, respectively.…”