Effect of styrene-butadiene latex with core-shell structure on the mechanical properties of cement-based composite materials and its mechanism

被引：0
|
作者：
Fan J. [1 ]
Guo J. [1 ]
Hu M. [1 ]
Li J. [1 ]
Yu Y. [2 ]
Jin J. [2 ]
Qi F. [2 ]
机构：
[1] School of Chemical Engineering and Technology, Tianjin University, Tianjin
[2] Drilling Research Institute of CNPC, Beijing
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2019年 / 36卷 / 02期
关键词：
Cementing; Deformation ability; Styrene-butadiene latexes; Toughening mechanism; Toughness;
D O I：
10.13801/j.cnki.fhclxb.20180403.001
中图分类号：
学科分类号：
摘要：
The deformation of cement sheath is often inconsistent with that of casing and formation, which leads to the failures of zonal isolation. In order to solve the problems, a kind of styrene butadiene rubber latex possessing good stability was synthesized by grafting 2-acrylamido-2-methyl-propane sulfonic acid and styrene to the liquid polybutadiene with low molecular weight via seed-emulsion polymerization. The structure and properties characteristics indicate that TEL-100L latex possesses good thermal stability and perfect core-shell structure. For oil well cement stone, the evaluations of mechanical property show that TEL-100L latex can significantly reduce the brittleness coefficient and elasticity modulus of cement stone, and improve its toughness and deformation ability. The exploration of toughening mechanism finds that TEL-100L latex can not only be adsorbed onto the cement grains surface by electrostatic attraction, but also can be cross connected with cement hydration system through the complexation with Ca2+, which leads to the formation of compact three-dimensional net structure and the improvement of toughness and deformation ability. © 2019, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：506 / 513
页数：7
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