中文摘要：

采用水相悬浮聚合法合成了甲基丙烯酸丁酯（BMA）-苯乙烯（St）共聚物，利用傅里叶变换红外光谱仪、核磁共振波谱仪和动态力学分析仪研究了共聚物的化学结构。将共聚物溶于N,N-二甲基乙酰胺（DMAc）中调制成一定浓度的溶液，测定了BMA—St/DMAc溶液的流变性能。结果表明，BMA—St共聚物对煤油、石油醚和庚烷的饱和吸附率分别为3．7，5．3，4．1g／g。BMA—St／DMAc溶液属于非牛顿假塑性流体，溶液的表观黏度随溶液温度的升高而降低，随溶液浓度的升高而升高。

英文摘要：

Butyl methacrylate-styrene （BMA-St） copolymer was synthesized by aqueous phase suspension polymeri- zation process. The chemical structure of the copolymer was characterized by Fourier transform infrared spectrometry（FTIR）, hydrogen nuclear magnetic resonance spectroscopy （^1 H-NMR） and dynamic mechanical analysis （DMA）. A solution with a given concentration of BMA-St copolymer was prepared by dissolving it in N,N- dimethyl acetylamide （DMAc）. The rheological behavior of BMA-St/DMAc solution was determined. The results indicate that the saturated adsorption rate of the BMA-St copolymer to organic solvents with weak polarity like kerosene, petroleum ether and heptane is 3.7 g/g, 5.3 g/g and 4.1 g/g BMA-St copolymer, respec- tively. The solution of the BMA-St copolymer in DMAc is a typical non-Newtonian pseudoplastic fluid, its apparent viscosity increases with solution concentration but decreases with the solution temperature.