Synthesis of star hydrophobically-modified acrylamide copolymers and its some properties in brine

被引：0

作者：

Duan, Ming ^{[1
]}

Fang, Shenwen ^{[1
]}

Zhang, Liehui ^{[1
]}

机构：

[1] State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu

来源：

E-Polymers | 2012年

关键词：

Acrylic monomers - Amides - Chlorine compounds - Photopolymerization - Viscosity;

D O I：

10.1515/epoly.2012.12.1.207

中图分类号：

学科分类号：

摘要：

Star copolymers of acrylamide (AM) and N,N-dimethyl-N-vinylnonadecan-1- aminium chloride (C18DMAAC) were synthesized by photopolymerization in water. Some properties of these star hydrophobically modified acrylamide copolymers (SHMPAM) with different C18DMAAC contents and the linear hydrophobically modified acrylamide copolymers (LHMPAM) in brine were characterized. The increase in C18DMAAC content resulted in decreased intrinsic viscosity and increased Huggins constant for SHMPAM. Similar results were observed for LHMPAM. With similar intrinsic viscosity and C 18DMAAC content, the Huggins constant of SHMPAM was much higher than that of LHMPAM, which might be due to the fact that SHMPAM had much stronger intramolecular interaction in dilute polymer solutions. In semi-dilute solutions, the apparent viscosity of SHMPAM was increased with increasing C 18DMAAC content, which was similar to that of LHMPAM. However SHMPAM exhibited higher apparent viscosity than LHMPAM because it had more arms and thus had more chances to form three-dimensional networks in semi-dilute solutions. In the flowinduced scission experiment, SHMPAM exhibited superior shear stability in comparison with LHMPAM. When the extensional shear rate was ≈ 40000 s-1, the reduction ratios of the apparent viscosities of the four SHMPAMs after the scission were about 80%. In contrast, when the extensional shear rate was ≈20000 s-1, the reduction ratio of the apparent viscosity of LHMPAM-0.40 had already reached around 80%.

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