writer：Zhang, M，Qiu, GM，Zhou, LX，Chen, HY，Shinich, I，Hiroshi, O
keywords：掺杂，聚甲基丙烯酸甲酯，疲劳电阻，稀土，氧化铝-硅氧烷溶胶，天然橡胶
source：期刊
specific source：Journal of Rare Earths
Issue time：2002年
Poly (methyl methacrylate) (PMMA) was used to wrap alumina-siloxane sol which was produced by water glass, aluminum nitrate and α-methacrylic acid, and as a result, alumina-siloxane gel wrapped by PMMA was obtained. Meanwhile, rare earth ions were employed to dope in the course of reaction, and the formed rare earth doped PMMA microcapsule powder was filled into natural rubber (NR). It is found through the analysis of mechanical properties that Young′s modulus universally improves and a remarkable resistance to fatigue is displayed. Retention rate of tensile strength is twice that of the controlled sample after ten thousand times of extension fatigue.