文献类型：期刊文献

英文题名：Synthesis of a novel comb-like copolymer used as dispersant in organic solvent and influence of free comb-like copolymer on CaCO3 suspension

作者：Jing, Xiwei[1];Gong, Weiguang[1];Feng, Zhongjun[2];Meng, Xin[3];Zheng, Baicun[1]

机构：[1]East China Univ Sci & Technol, Res & Dev Ctr Sports Mat, Shanghai 200237, Peoples R China;[2]Shanghai Sunrise Polymer Mat Co Ltd, Technol Ctr, Shanghai, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai, Peoples R China

年份：2017

卷号：38

期号：7

起止页码：1003

外文期刊名：JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20170203235274);WOS:【SCI-EXPANDED(收录号:WOS:000393209000013)】；

语种：英文

外文关键词：Free comb-like copolymer; organic system; rheological behavior; synthesis; viscosity

摘要：A novel comb-like copolymer poly (1e)-graft-poly (epsilon-caprolactone) (SMA-g-PCL, SP), which can be used as an effective CaCO3 dispersant in organic solvent, was prepared via the esterification reaction between SMA and PCL. The structures and compositions of the graft copolymer were determined by Fourier transform infrared spectrometry (FTIR), H-nuclear magnetic resonance (H-1 NMR), and gel permeation chromatography (GPC), respectively. The influences of free comb-like copolymer on CaCO3 suspension viscosity and rheological behavior were investigated. It was found that the particle-binding bridge generated among CaCO3 particles through hydrogen bonding and/or electrostatic interactions increased the suspension viscosity as well as the depletion flocculation. On the other hand, it was noteworthy that the free comb-like copolymer could make the CaCO3 suspension evolve from shear-thinning fluid or nearly Newtonian fluid into shear-thickening fluid. It was attributed to the formation of a transient network through intermolecular associations between the adsorbed SP and the free polymer chains under the action of shear. Finally, the fitting parameters from the Herschel-Bulkley model were in good agreement with the evolution of the rheological behavior of CaCO3 suspension. [GRAPHICS]