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膨胀石墨(EG)填充量小于25 %时 ,EG/SBS复合材料的拉伸强度随EG填充量的增加而增加 ,最大拉伸强度达27.8MPa ;而在EG填充量为10 %时 ,复合材料的扯断伸长率达到最大值(785 %) ,随后开始下降。用二甲苯作溶剂 ,在145℃抽提EG/SBS复合材料24h后 ,复合材料中形成了稳定的交联结构 ,同时 ,凝胶含量随EG填充量的增加而增加。由此说明复合物中EG与SBS之间产生了强烈的界面相互作用。DMA分析结果可知 :100份SBS中填充EG量从0增加到8份时 ,PB相Tg 从 -78.15℃升至 -69.52℃ ,而PS相Tg 基本恒定 ,表明EG主要与SBS中的PB相发生强相互作用
The tensile strength of EG / SBS composites increases with the filling amount of EG and the maximum tensile strength reaches 27.8MPa when the filling amount of EG is less than 25%. When the filling amount of EG is 10% Of the elongation at break reached the maximum (785%), then began to decline. With xylene as solvent, the crosslinked structure of EG / SBS composites was formed at 145 ℃ for 24 h. At the same time, the gel content increased with the increase of EG loading. This shows that there is a strong interfacial interaction between EG and SBS in the complex. The result of DMA analysis shows that the Tg of PB increases from -78.15 ℃ to -69.52 ℃ and the phase of Tg of PS is almost constant when the content of EG in 100 SBS is increased from 0 to 8, indicating that EG mainly interacts with PB in SBS Strong interaction