Phase separation in aqueous stabilizer-free two-phase polymerization

FAN Weixiao; SHAN Guorong; PAN Pengju

doi:10.11949/j.issn.0438-1157.20160640

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Phase separation in aqueous stabilizer-free two-phase polymerization

更新时间：2025-12-10

- Phase separation in aqueous stabilizer-free two-phase polymerization
- CIESC Journal Issue 2, Pages: 781-787(2017)
- 作者机构：
  
  化学工程联合国家重点实验室, 浙江大学化学工程与生物工程学院,浙江,杭州,310027
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160640
  CLC： Q326.4
- Online First：05 February 2017，
  
  Published：05 February 2017
- 稿件说明：
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FAN Weixiao, SHAN Guorong, PAN Pengju. Phase separation in aqueous stabilizer-free two-phase polymerization[J]. CIESC Journal, 2017, (2): 781-787.
DOI：

FAN Weixiao, SHAN Guorong, PAN Pengju. Phase separation in aqueous stabilizer-free two-phase polymerization[J]. CIESC Journal, 2017, (2): 781-787. DOI： 10.11949/j.issn.0438-1157.20160640.

摘要

以丙烯酰胺（AM）、季铵类阳离子甲基丙酰氧乙基三甲基氯化铵（DMC）和丙烯酰氧乙基二甲基苄基氯化铵（AODBAC）为单体，以2，2'-偶氮双[2-（5-甲基-2-咪唑啉-2-基）丙烷]二盐酸化物（VA044）为引发剂，在水溶液中进行无稳定剂体系下的双水相共聚。利用紫外分光光度仪在线观察体系的分相过程并测定体系的临界分相点。通过改进的溴化法测定临界转化率（Xc）。利用黏度法测定临界分子量（Mc）。并对各个因素对于Xc和Mc的影响进行研究。结果表明具有表面活性的阳离子单体AODBAC对体系的相分离具有较好的促进作用。引发剂的用量和AODBAC的摩尔分数（fAODBAC）对于Xc的影响较小，反应温度升高会使Xc增大。总单体浓度和fAM的升高会使Xc减小。引发剂用量的增加、反应温度和fAODBAC的升高都会使Mc减小。fAM和单体浓度的增加会使Mc显著增加。

Abstract

Aqueous stabilizer-free two-phase copolymerization of acrylamide (AM)

2-methylacryloylxyethyl trimethylammonium chloride (DMC) and acryloyloxyethyl dimethylbenzyl ammonium chloride (AODBAC) with initiator 2

2'-azobis[2-(2-imidazolin-2-yl) propane]-dihydrochloride was studied. UV spectrophotometer was used to monitor in-line transmittance change of reaction mixture and to detect critical point of phase separation. The conversion rate (Xc) and molecular weight (Mc) at the critical point were measured by improved brominating and viscometric methods

respectively

and were investigated on effect of various factors. The cationic surfmer

AODBAC

was found to have a good performance on promoting phase separation of the system. Change of initiator amount and molar fraction of AODBAC had minimal effect on Xc

which however increased linearly at increase of temperature. The increase of initiator amount

temperature

and molar fraction of AODBAC caused linear decrease of Mc. Xc decreased but Mc increased significantly when molar fraction of AM and overall monomer amount were increased.

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