以SEBS为增韧剂对PA6进行增韧改性 ,研究了SEBS的用量和处理方法对PA6性能的影响以及充油SEBS g MAH对不同牌号PA6性能的影响。结果表明 ,PA6的冲击韧性随SEBS用量的增加而提高 ,尤其是充油SEBS g MAH的加入 ,使共混物的韧性及伸长率得...以SEBS为增韧剂对PA6进行增韧改性 ,研究了SEBS的用量和处理方法对PA6性能的影响以及充油SEBS g MAH对不同牌号PA6性能的影响。结果表明 ,PA6的冲击韧性随SEBS用量的增加而提高 ,尤其是充油SEBS g MAH的加入 ,使共混物的韧性及伸长率得到明显改善 ,当充油SEBS g MAH的质量分数为 10 %时 ,体系的常温缺口冲击强度是纯PA6的 6倍。SEBS的熔融接枝过程中 。展开更多
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 exis...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.展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.51273132,50933004 and 51121001)
文摘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.
