摘要
The molecular structure of SEBS grafted with maleic anhydride（SEBS-g-MAH） through ultrasound initiation was investigated by nuclear magnetic resonance（NMR）. It can be confirmed that the grafting groups mainly exist on the terminus of the ultrasound initiated SEBS-g-MAH. However, it was difficult to detailedly confirm the block of the SEBS on which MAH is grafted through characterization of 1H-NMR due to the complex structure of the SEBS. Moreover, the temperaturedependent infrared spectra of the ultrasound initiated SEBS-g-MAH were also analyzed by the perturbation correlation moving window 2D（PCMW2D） correlation spectroscopy. It could confirm that the broken point existed at the joint between poly（ethylene-co-1-butene）（EB block） and polystyrene block（S block）. Therefore, the grafting groups were attached to not only the S block but also the EB block. In addition, in order to well understand the aggregation structure of the ultrasound initiated SEBS-g-MAH, the possible grafting mechanism and aggregation model of the ultrasound initiated SEBS-g-MAH at room temperature were also proposed.
The molecular structure of SEBS grafted with maleic anhydride（SEBS-g-MAH） through ultrasound initiation was investigated by nuclear magnetic resonance（NMR）. It can be confirmed that the grafting groups mainly exist on the terminus of the ultrasound initiated SEBS-g-MAH. However, it was difficult to detailedly confirm the block of the SEBS on which MAH is grafted through characterization of 1H-NMR due to the complex structure of the SEBS. Moreover, the temperaturedependent infrared spectra of the ultrasound initiated SEBS-g-MAH were also analyzed by the perturbation correlation moving window 2D（PCMW2D） correlation spectroscopy. It could confirm that the broken point existed at the joint between poly（ethylene-co-1-butene）（EB block） and polystyrene block（S block）. Therefore, the grafting groups were attached to not only the S block but also the EB block. In addition, in order to well understand the aggregation structure of the ultrasound initiated SEBS-g-MAH, the possible grafting mechanism and aggregation model of the ultrasound initiated SEBS-g-MAH at room temperature were also proposed.
基金
financially supported by the National Natural Science Foundation of China(Nos.51273132,50933004 and 51121001)
