Thermal degradation kinetics and mechanism of epoxidized natural rubber
-
Canzhong He
and
Zheng Peng
Abstract
Thermal resistance is one of the most dominative properties for polymer materials. Thermal degradation mechanisms of epoxidized natural rubber (ENR) and NR are studied by thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The results show that, the introduction of epoxy groups into the NR molecular main chain leads to a remarkable change in the degradation mechanism. The thermal stability of ENR is worse than that of NR. For the first thermooxidative degradation stage, the thermal decomposition mechanism of ENR is similar to that of NR, which corresponds to a mechanism involving one-dimensional diffusion. For the second stage, the thermal decomposition mechanism of ENR is a three-dimensional diffusion, which is more complex than that of NR. Kinetic analysis showed that activation energy (Eα), activation entropy (ΔH) and activation Gibbs energy (ΔG) values are all positive, indicating that the thermooxidative degradation process of ENR is non-spontaneous.
The financial support from the National Program on Key Basic Research Project of China for 973 Program (contract grant number: 2010CB635109) is gratefully acknowledged.
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Articles in the same Issue
- Masthead
- Masthead
- Review
- Considerations for the design of polymeric biodegradable products
- Original articles
- Study on copolymers synthesized from 2,3-epoxypropyl-3-(2-furyl) acrylate – styrene and their glass fiber reinforced composites
- Proton conducting polymer electrolytes based on PVdF-PVA with NH4NO3
- Preparation of starch-based styrene acrylate emulsion used as surface-treatment agent for decorative base paper
- Thermal degradation kinetics and mechanism of epoxidized natural rubber
- The thermal degradation behavior of meta- and para- hetero-amide fibers by TGA-FTIR
- Determination of partially hydrolyzed polyacrylamide in wastewater produced from polymer flooding by colloid titration
- Mechanical, electrical and tribological properties of graphite filled polyamide-6 composite materials
- Modification and improvement of acrylic emulsion paints by reducing organic raw materials and using silica nanocomposite
- Preparation and characterization of positively charged polysulfone nanofiltration membranes
- Contribution of rice husk ash to the performance of polymer mortar and polymer concrete
