【摘要】 采用不同种类的改性剂对新疆哈密硅灰石进行表面化学包覆改性,其中用硬脂酸和铝酸酯复合改性剂效果较好,红外光谱与界面接触角分析结果表明改性硅灰石粒子表面具有亲油性。TEM结构分析和SEM形貌分析表明,改性硅灰石粉料与橡胶基质相容性良好。TGA表明,改性硅灰石/顺丁橡胶比硅灰石/顺丁橡胶提高了25.9℃,显示其热稳定性得以提高。将改性硅灰石用于填充顺丁橡胶替代白炭黑,制备的复合硫化胶片的力学性能为:绍尔硬度64,伸长率610%,扯断强力22.1MPa,磨耗量0.039cm3/km。研究表明改性硅灰石可以替代白炭黑应用于顺丁橡胶。更多还原

【Abstract】 Surface modification of wollastonite from Hami was studied by different modifiers,and stearic acid and aluminum coupling agent had better modification effect than other agents.The characterization of FT-IR and interface contact angle showed that the surface of modified wollastonite particle was hydrophobic.TEM and SEM morphology analysis showed that the compatibility between the modified wollastonite particle and rubber matrix was good.TGA analysis showed that the heat distortion temperature of the rubber which mixed modified wollastonite increased by 25.9℃,which showed the heat stability was increased.The modified wollastonite was applied in filling the butadiene rubber in order to substitute the silica,and the mechanical properties of sulfuration rubber composite were as following:Shaw hardness of 64,ebelongation of 610 percent,tear strength of 22.1 MPa,and abrasion loss of 0.039cm3/km.It was shown that the modified wollastonite can be used to substitute silica in butadiene rubber.更多还原