ICCAS OpenIR
The study of the critical crosslinking concentration for HPAM/AlCit system
Lin, MQ; Dong, ZX; Song, JH; Tang, YL; Li, MY; Wu, ZL
2003-12-01
Source PublicationACTA POLYMERICA SINICA
ISSN1000-3304
Issue6Pages:816-820
AbstractThe critical crosslinking concentration of linked polymer solutions(LPS) formed by low concentration and high molecular weight partially hydrolyzed polyacrylamide (HPAM) and aluminum citrate (AlCit) was investigated by using dynamic viscosimetry, nuclear pore membrane, dynamic light scattering and Al-27-NMR measurements. The experimental results show that the viscosity and spin-lattice relaxation time (T-13) of HPAM/AlCit crosslinking systems decrease with reaction time in low concentrations( the concentration of HPAM is between 100 mg/L and 200 mg/L) and increase with reaction time in a high concentration (300 mg/L) The results measured by dynamic light scattering show that the mean hydrodynamic radius of linked polymer coils(LPC) is about 238 nm and 246 nm with HPAM concentrations of 100 mg/L and 200 mg/L in the solution, respectively. The filtration velocity of the LPS with HPAM concentrations of 100 mg/L and 200 mg/L in the solution is almost the same. The mean hydrodynamic radius of LPC is about 379 nor in the LPS with HPAM concentrations of 300 mg/L, and the filtration velocity of the LPS is lowered obviously. These results indicate that the linked polymer solution is formed by intra-molecular crosslinking of HPAM and AlCit forming linked polymer coils in the system of lower concentration. When the polymer concentration of HPAM/AlCit system is increased to a critical concentration, the weak gel is formed by crosslinking of. LPC. The critical crosslinking concentration of LPS is between 200 mg/L and 300 mg/L for the system made up of HPAM molecular weight 1.4 x 10(7) and NaCl concentration 2000 mg/L. The critical crosslinking concentrations of the linked polymer solution measured by different methods are consistent with each other.
KeywordPrtially Hydrolyzed Polyacrylamide Aluminum Citrate Linked Polymer Solution Linked Polymer Coil Critical Crosslinking Concentration
Indexed BySCI
Language英语
WOS IDWOS:000187675300009
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/81368
Collection中国科学院化学研究所
Corresponding AuthorLin, MQ
Affiliation1.Univ Petr, Enhanced Oid Recovery Res Ctr, Beijing 102249, Peoples R China
2.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Lin, MQ,Dong, ZX,Song, JH,et al. The study of the critical crosslinking concentration for HPAM/AlCit system[J]. ACTA POLYMERICA SINICA,2003(6):816-820.
APA Lin, MQ,Dong, ZX,Song, JH,Tang, YL,Li, MY,&Wu, ZL.(2003).The study of the critical crosslinking concentration for HPAM/AlCit system.ACTA POLYMERICA SINICA(6),816-820.
MLA Lin, MQ,et al."The study of the critical crosslinking concentration for HPAM/AlCit system".ACTA POLYMERICA SINICA .6(2003):816-820.
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