THE TOPOCHEMISTRY OF ACRYLAMIDE POLYMERIZATION IN INVERSE SUSPENSION

被引：8
作者：
DIMONIE, M
MARINESCU, N
VASILESCU, DS
SHAFFER, O
CALDARARU, H
CARAGHEORGHEOPOL, A
LANGURI, J
机构：
[1] LEHIGH UNIV,INST EMULS POLYMERS,BETHLEHEM,PA 18015
[2] INST PHYS CHEM,BUCHAREST,ROMANIA
来源：
JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY | 1992年 / 29卷 / 03期
关键词：
D O I：
10.1080/00222339208052126
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The acrylamide polymerization in inverse suspension has been studied for the cyclohexane-acrylamide-water system in the presence of an "oil"-soluble emulsifier [polyoxyethylene (4) nonylphenol, EO(4)NP] and a redox initiator (NaHSO3-K2S2O8). The molecular weight of polyacrylamide has been found to increase significantly in the presence of alkaline salts of some organic acids. This effect is supposed to occur by interaction of the salts with the ethylene oxide groups of the emulsifier, thus limiting the chain transfer reactions. Several methods (conductometry, viscosimetry, UV and ESR spectroscopy, scanning electron microscopy) have been used to characterize the gel phase formed by the initial mixture of components. The topochemistry changes during the reaction show several distinct stages: coarse water-in-oil dispersion, concentrated oil-in-water emulsion, bicontinuous system, and coarse polymer/water dispersion in oil.
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页码：277 / 296
页数：20
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