Electrolytes on governing particle coagulation and size distribution in the emulsion polymerization of butyl acrylate

被引:0
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作者
Xiaohui Xu
Baijun Liu
Mingyao Zhang
Shuang Liu
Fupeng Zhu
Jing Wang
机构
[1] Changchun University of Technology,Engineering Research Center of Synthetic Resin and Special Fiber, Ministry of Education
来源
Journal of Polymer Research | 2016年 / 23卷
关键词
Emulsion polymerization; Particle size distribution; Particle coagulation; Stability; Electrolyte;
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学科分类号
摘要
Poly (butyl acrylate) (PBA) latices with controllable particle size (90–350 nm) were synthesized via one-step batch emulsion polymerization in the presence of different species of electrolyte. The evolution of particle size and number as a function of monomer conversion were tracked in order to investigate the effect of electrolyte species on the particle stability. For electrolyte with different anions, the particle size of final latices decreased with increasing pH of the aqueous phase and the sequence was Na2CO3 < NaHCO3 < Na2C2O4 < NaCl, latices with Na2SO4 showed some particular performance and possessed of a particle size up to 347.4 nm; for electrolyte with different valences of counter ion, while achieving the similar particle size (Ca. 120 nm), an obvious variance in ionic strength was found (0.03, 0.016 and 0.0035 mol kg−1 for Na+, Mg2+ and Al3+). It indicate that electrolyte affects the particle stability by adjusting the pH of the aqueous phase and ionic strength, further controls the particle coagulation. As a result, latices with designated final particle size and distribution can be obtained by choosing the appropriate type and concentration of electrolyte.
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