Polyaniline dispersions. 9. Dynamic light scattering study of particle formation using different stabilizers
Polyaniline dispersions. 9. Dynamic light scattering study of particle formation using different stabilizers
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DOI：
10.1021/la980365l
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发表时间：
1998-11-10
期刊：
影响因子：
3.9
通讯作者：
Stejskal, J
中科院分区：
文献类型：
--
作者：
Riede, A;Helmstedt, M;Stejskal, J
用动态光散射法研究了盐酸苯胺分散聚合过程中粒子的形成。比较了有机聚合物聚N-乙烯基吡咯烷酮和羟丙基纤维素与无机二氧化硅胶体作为聚苯胺分散体的空间稳定剂的作用。在聚合过程中，对粒子的大小、粒子半径分布的相对宽度、散射光的强度和光吸收进行了监测。在聚合的最后阶段，观察到了羟丙基纤维素稳定的分散粒子的聚集。以活化能为指标，研究了温度对苯胺聚合速率的影响。
Dynamic light scattering was used to study the particle formation in the dispersion polymerization of aniline hydrochloride. The organic polymers poly(N-vinylpyrrolidone) and hydroxypropylcellulose are compared with inorganic silica colloids in their role as steric stabilizers of polyaniline dispersions. The particle size, the relative width of the radii distribution of the particles, the intensity of scattered light, and the optical absorption have all been monitored during the polymerization. The aggregation of dispersion particles stabilized with hydroxypropylcellulose has been observed at the final stages of polymerization. The effect of temperature on the polymerization rate of aniline is reported in terms of activation energies.