Swelling of cross-linked polystyrene spheres in toluene vapor
Swelling of cross-linked polystyrene spheres in toluene vapor
复制标题
交联聚苯乙烯球在甲苯蒸气中的溶胀
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
R. Berger
中科院分区：
文献类型：
--
作者：
Rui Zhang;K. Graf;R. Berger
利用微机械悬臂梁传感器，通过质量加载研究了单个微米级聚苯乙烯（PS）微球在甲苯蒸气中的溶胀行为。对于4%-8%的交联PS，在饱和甲苯蒸气中测得质量增加180%。溶胀的PS球的质量随着暴露于紫外光的时间的增加而减小。此外，溶胀响应在第一次和第二次暴露于甲苯蒸气之间显著不同。这是由于在PS球表面形成了交联壳层。观察到局部辐照PS球的形状持久部分。
The swelling behavior of individual micron-sized polystyrene (PS) spheres in toluene vapor was studied via mass loading by means of micromechanical cantilever sensors. For 4%–8% cross-linked PS a mass increase of 180% in saturated toluene vapor was measured. The mass of the swollen PS sphere decreases with increasing exposure time to ultraviolet light. In addition, the swelling response is significantly different between the first and the second exposure to toluene vapor. This is attributed to the formation of a cross-linked shell at the surface of the PS spheres. Shape persistent parts were observed for locally irradiated PS spheres.