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合成橡胶工业 |
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合成橡胶工业 |
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Dispersion mechanism of nano-particles in polymers by ISBS and ultrasonic oscillation Meng Qingyun（Beijing University of Chemical Technology, Beijing 100029,
China） Abstract：In situ bubble
stretching(ISBS) method was discussed and analysis of the dispersion process of in-organic
additives in polymers was performed using this method. The ISBS method could be applied to
dispersion ofsolid granular aggregates in polymer melts since the micro granules and their
aggregates in the polymer melt couldserve as nucleation agents, giving rise to bubbles
which expanded at the micro granules and their aggregates, andin situ stretching
dispersion thus resulted. The conclusion was that the first the ISBS method was an
effective insitu bi - directional stretching dispersion method, the second was from a
theoretical viewpoint, when the bubbleexpanded, the order of magnitude of stretching rate
of the surrounding polymer could reach 106 s -1 or more, whichwas two orders of magnitude
higher than the shear rate103 ～ 104 s- 1 obtained with screw extrusion. 原位气泡拉伸法在高聚物中纳米粒子的分散机理及超声振荡研究 孟庆云 吴大鸣 摘 要：探讨了利用原位气泡拉伸法(ISBS法)分散添加在高聚物中的纳米无机添加物的分散机理.ISBS方法可以用来分散添加在高聚物熔体中的固体颗粒团聚体.结果表明:首先ISBS方法是一种有效的原位双向拉伸分散方法;理论计算表明,当气泡膨胀时,在气泡周围可以产生高达106
s-1的拉伸速率场,它比传统的挤出设备所能提供的103～104 s-1的拉伸速率高两个数量级. |
| Author Resume：Meng Qingyun, doctor.Wu
Daming,To whom all correspondence should be addressed. E - mail: wd-mym@ public, bta. net.
cn. 孟庆云（北京化工大学,北京,100029） 吴大鸣（北京化工大学,北京,100029） References： ［1］Wu Daming, Meng Qingyun, Liu Ying,
et al. In situ bubble stretching dispersion mechanism for additives in polymers[J]. J
Polym Sci, Part B: Polym Phys, 2003, 41 (10): 1 051 ～ 1 058
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Manuscript Received：2002年12月4日 Published：2003年7月15日 |
