Thermal Stability and Decomposition Kinetics of  Polysuccinimide

Mingxing Huang,Cairong Zhou,Li Zhang

doi:10.4236/ajac.2013.412091

Abstract

The thermal stability and decomposition kinetics of polysuccinimide (PSI) were investigated using analyzer DTG-60 under high purity nitrogen atmosphere at different heating rates (3, 6, 9, 12 K/min). The thermal decomposition mechanism of PSI was determined by Coats-Redfern method. The kinetic parameters such as activation energy (E), pre-exponential factor (A) and reaction order (n) were calculated by Flynn-Wall-Ozawa and Kissinger methods. The results show that the thermal decomposition of PSI under nitrogen atmosphere mainly occurs in the temperature range of 619.15-693.15 K, the reaction order (n) was , the activation energy (E) and pre-exponential factor (A) were obtained to be 106.585 kJ/mol and 4.644 × 109 min-1, the integral and differential forms of the thermal decomposition mechanism of PSI were found to be and , respectively. The results play an important role in understanding the thermodynamic properties of polysuccinimide.

Highlights

Polyaspartic acid (PASP, CAS181828-06-8) has amino and carboxyl groups, which belongs to the biological macromolecule material and is a kind of polymer of amino acids
Since it has the characteristics of good biocompatibility and biodegradability, PASP has been widely used in industrial and medical fields as a new type of green chemicals [1]
The results show that the thermal decomposition of PSI

Summary

Introduction

Polyaspartic acid (PASP, CAS181828-06-8) has amino and carboxyl groups, which belongs to the biological macromolecule material and is a kind of polymer of amino acids. Since it has the characteristics of good biocompatibility and biodegradability, PASP has been widely used in industrial and medical fields as a new type of green chemicals [1]. Polysuccinimide (PSI, CAS689903-2) is the intermediate of PASP. The chemical structure of the monomer can be written as: O CH2 C H2N CH C N CH2 C CH C. PSI is a kind of linear polyimide with high activity and it is easy to open ring changing into poly asparagine with side chains. Many kinds of derivatives that were used as drug carriers have been prepared [2]

Methods

Results

Conclusion