Online monitoring of emulsion polymerization using electrical impedance spectroscopy

被引：11

作者：

Ghasemi, Samira ^{[1
]}

Darestani, Mariam T. ^{[1
]}

Abdollahi, Zohreh ^{[1
]}

Gomes, Vincent G. ^{[1
]}

机构：

[1] Univ Sydney, Sch Chem & Biomol Engn, Sydney, NSW 2006, Australia

来源：

POLYMER INTERNATIONAL | 2015年 / 64卷 / 01期

关键词：

emulsion polymerization; electrical impedance spectroscopy; online monitoring; particle size; conversion; CONDUCTIVITY MEASUREMENTS; OPERATING-CONDITIONS; PARTICLES; CALORIMETRY; VALIDATION; MEMBRANES; EVOLUTION; SYSTEMS; STYRENE; NUMBER;

D O I：

10.1002/pi.4810

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A frequency-dependent electrical monitoring technique was developed for characterizing emulsion polymerization online. High resolution electrical impedance spectroscopy (EIS) was conducted to study emulsion polymerization of styrene in terms of the key process parameters. Relationships between EIS data and process and product attributes such as monomer conversion and particle size were investigated. Electrical impedance values were measured at frequencies ranging from 1Hz to 100 kHz. EIS parameters revealed changes in emulsion properties with time for both aqueous and organic phases during polymerization. At relatively higher frequencies (1 kHz) EIS data were found to be dominated by events in the continuous phase showing transitions in polymerization rates and intervals, while changes in monomer droplet and polymer particle sizes were dominant at lower frequencies (1Hz). The EIS data were found to correlate well with polymerization rate, monomer conversion and particle size profiles at the appropriate frequencies in real time. (c) 2014 Society of Chemical Industry

引用

页码：66 / 75

页数：10

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