Thermal stability and combustion behaviors of poly(oxybutylene)amides
Journal
Polymer Journal
Journal Volume
34
Journal Issue
2
Pages
72-80
Date Issued
2002
Author(s)
Abstract
Polymerization of 1, 2-epoxybutane (BO) with various amides led to a family of gasoline detergents useful for preventing automobile engine valve deposits. Effective compounds are amphiphilic copolymers consisting of a hydrophobic polyoxybutylene backbone and hydrophilic amide functionalities. The engine performances of these polymer additives were correlated with their thermal stability and the combustion behaviors at high temperature. Investigated by using a thermal gravimetric analysis (TGA), we found the thermal stability to have the following trend according to the backbone structures of oxyethylene > oxybutylene > oxypropylene. Furthermore, the presence of amide or multiple amide functionalities in the structures greatly enhanced the backbone stability up to 100°C in air and 36°C in nitrogen by comparing 50 wt% decomposition temperatures of the TGA data. The amides are considered as built-in antioxidants for free-radical scavenging and backbone stabilizers.
SDGs
Type
journal article