Fabrication and Thermal Degradation Kinetics of PBT/BEO/Nano-Sb2O3 Composites

Meng Ma,Jiqiang Ma,Lei Niu,Jinming Ma,Tifeng Jiao,Filippo Giubileo

doi:10.1155/2020/6641702

Meng Ma, Jiqiang Ma + Show 4 more

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https://doi.org/10.1155/2020/6641702

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Abstract

Developing polybutylene terephthalate (PBT) with high thermal stability and flame-retardant properties is crucial for automotive, biomedical devices, electronics, and other fields. Herein, we focus on a PBT/brominated epoxy resin (BEO)/nano-Sb2O3 composites by a melt-blending method. The effects of heating rate and nano-Sb2O3 content on the thermal stability and thermal degradation kinetics of PBT composites were studied by TG-DSC. With the increasing of heating rate, the thermal hysteresis effect of temperature gradient is produced, which is eliminated when the temperature exceeds 400°C. With the increase of nano-Sb2O3 content, the E a of PBT/BEO/nano-Sb2O3 composites increases at first and then decreases. When the content of nano-Sb2O3 is 3 wt%, the E a of PBT/BEO/nano-Sb2O3 is the highest, which is 66.18 kJ/mol (31.43%) higher than that of neat PBT. Also, the exploration of the thermal degradation kinetics of PBT/BEO/nano-Sb2O3 composites is expected to provide research ideas for new high flame-retardant materials.

Highlights

As a semicrystalline thermoplastic polymer, polybutylene terephthalate (PBT) possessed excellent mechanical properties and thermal property, which is widely used in engineering fields such as automobile, biomedical devices, and electronic and electrical industry [1, 2]
Feng et al researched the thermal performance for polysulfonamide-based single polymer composites (PSA/SPCs) by thermogravimetric analysis (TG), and the results showed that thermal stability of PSA/SPCs was better than PSA resin composite [8]
Curves of TG and DTG for pure PBT are shown in Figures 1(a) and 1(b), the heating rates at 5°C/min, 10°C/min, 20°C/min, and 40°C/min

Summary

Introduction

As a semicrystalline thermoplastic polymer, polybutylene terephthalate (PBT) possessed excellent mechanical properties and thermal property, which is widely used in engineering fields such as automobile, biomedical devices, and electronic and electrical industry [1, 2]. PBT is mainly composed of carbon and hydrogen, which leads to strong flammability and serious dripping as it burned. It is currently in the compound use of several flame retardants to improve thermal stability and flame retardancy for PBT composites [3]. These additive flame retardants are seriously affecting the mechanical properties and restricting the application of PBT composite. Nanometal oxide materials exhibit an unparalleled combination of chemical, electrical, magnetic, optical, and thermal properties [4, 5], which have potential applications in flame retardants, electronics, and photonics industry

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