马来酸单十八酯接枝气相白炭黑对弹性体SBS性能增强效应

利用偶联剂KH570，马来酸单十八酯和苯乙烯对气相白炭黑进行接枝改性，用傅立叶红外光谱（FT—IR），热重分析法（TGA）等手段对改性后白炭黑进行表征。探讨了不同配方改性的白炭黑对SBS机械性能的影响，寻求增强SBS的最优配方。红外光谱分析和热重分析结果表明混合单体成功接枝在白炭黑表面；在白炭黑接枝改性过程中，滴加方式投料比一次投料更有效，马来酸单十八酯和苯乙烯的最佳单体摩尔比例为5：8；不同总单体浓度改性的白炭黑，对SBS性能增强不同，总单体浓度达15％时，增强效果最好。改性白炭黑的用量对增强效果有很大影响，在白炭黑添加量为SBS质量分数的15％时，材料达到最佳性能。

The Performance-enhancing Effect of the Elastomer SBS Modified by Nano-SiO2 Grafted by Monooctadecyl Maleate

The nano-SiO2 had been treated by as-phase treatment using the coupling agent KH570, monooctadecyl maleate and styrene. The modified SiO2 were characterized by Fourier Infared spectra （Fq＇-IR） and Thermogravimetric analysis （TGA） . In order to obtain the best SBS modification ratio, the mechanical properties of the SBS modified by different new treated nano-SiO2 have been investigated. The FT-IR analysis and TGA indicate that the mixed monomers have been successfully grafted onto the surface of the nano-SiO2. In the process of grafting nano-SiO2, the styrene added by droping is more effective than added the sample by one time, and the optimal monomer molar ratio of monooctadecyl maleate and styrene is 5 ： 8. The monomer content of the grafted nano-SiO2 affects the performance-enhancing effect of SBS, and the optimal monomer content is 15% of SiO2. The SBS performance-enhancing effect is affected by the content of the modified nano-SiO2. the elastomer SBS displays the optimum mechanical properties when comprising 15% of SiO2.