کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5188192 | 1381148 | 2009 | 7 صفحه PDF | دانلود رایگان |
Transparent polystyrene (PS) latexes were prepared by photo-polymerization of a routine styrene (St) emulsion with a surfactant concentration of 0.4Â wt% and a monomer concentration of 10Â wt%, by using UV light as well as a hydrophilic photo-initiator. The entire polymerization could be performed within 1-2Â h and display a conversion higher than 90%. The particle sizes could be tuned in the range of 20-40Â nm. The formation mechanism for these of nano-sized latex particles was attributed to an in situ formation of PS chains with terminal hydroxyl groups. The presence of the hydroxyl-functionalized polymer chains seemed to promote a colloidal stability of the small latex particles and prevent coagulation even at low surfactant concentrations.
Journal: Polymer - Volume 50, Issue 1, 2 January 2009, Pages 141-147