热熔压敏胶SDS共聚物热稳定性的氧化动力学研究(Ⅱ)

As the poor aging property of the SDS (styrene-diene-styrene triblock elastomer) copolymer hot-melt pressure-adhesives (HMPSAs),it was very important to study the aging and anti-aging property of the SDS triblock copolymer,such as SBS and SIS.The mechanistic scheme based on the standard scheme for radical chain oxidation,but taking into account the decomposition of peroxide resulted in the oxidation,was built.The kinetic equation of oxygen uptake was deduced from the proposed mechanism,which is composed of a set of physically reasonable parameter.The relationships between the parameters and the induction time,maximum oxygen uptake and maximum oxidation rate were discussed.The numerical simulation methods were established in order to get the parameters from the experiment data,by which the most kinetics equations of oxygen uptake of the ingredients of hot-melt pressure-sensitive adhesives were numerically fitted and the relativity from the model to the data were discussed.The results were to be benefit to study the anti-aging performance of the other materials.