Particle Size Effects in TEMPO-Mediated Radical Polymerization of Styrene in Aqueous Miniemulsion
Particle Size Effects in TEMPO-Mediated Radical Polymerization of Styrene in Aqueous Miniemulsion
复制标题
DOI：
10.1002/marc.200600542
复制
发表时间：
2006-12
影响因子：
4.6
通讯作者：
Tadashi Nakamura;P. Zetterlund;M. Okubo
中科院分区：
文献类型：
--
作者：
Tadashi Nakamura;P. Zetterlund;M. Okubo
以十二烷基苯磺酸钠和聚乙烯醇为胶体稳定剂，在125 °C下，研究了2，2，6，6-四甲基哌啶基-1-氧（克里思）介导的苯乙烯细乳液自由基聚合。粒径对聚合过程有显著影响。减小颗粒尺寸导致明显更高的聚合速率，但较少控制和较低程度的活性。对于直径大于约170 nm的颗粒，聚合行为基本上与相应的本体体系相同。通过在适当范围内改变粒度，可以调节聚合，使得聚合速率增加，同时仍然保持合理的控制和活性。
2,2,6,6-Tetramethylpiperidinyl-1-oxy (TEMPO)-mediated radical polymerization of styrene in aqueous miniemulsion at 125 °C using sodium dodecylbenzenesulfonate and poly(vinyl alcohol), respectively, as colloidal stabilizers has been investigated. The particle size had a dramatic effect on the polymerization process. Decreasing particle size led to a markedly higher polymerization rate, but less control and a lower degree of livingness. For particles with diameters greater than approximately 170 nm, the polymerization behavior was essentially the same as in the corresponding bulk system. By varying the particle size within an appropriate range, it is possible to tune the polymerization such that the polymerization rate is increased while still maintaining reasonable control and livingness.