Effects of alkali soluble resin on the emulsion polymerization of butyl methacrylate |
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Authors: | Herng-Dar Hwu Yu-Der Lee |
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Affiliation: | (1) Department of Chemical Engineering, National Tsing Hua University, Hsinchu, 30043, Taiwan, Republic of China |
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Abstract: | In this work, alkali soluble resin (ASR) was evaluated as a surfactant in the emulsion polymerization of butyl methacrylate
(BMA). Kinetic analysis indicated that the ASR surfactant retarded the reaction rate and reduced the average number of radicals
per latex particle. Since the particle nucleation period proceeds until the disappearance of droplets, Interval II does not
exist in this system. Experimental results show that the particle number depends on the 0.31 and 0.51 powers of the ASR and
KPS concentration, respectively. The particle size distribution of the latex becomes broad with the increase of the ASR concentration
in the emulsion polymerization. This phenomenon explains why the period of the particle nucleation is proportional to the
ASR concentration used in the reaction. |
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Keywords: | Latex Polymeric surfactant Alkali soluble resin Emulsion polymerization Retarding effect |
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