反相微乳液聚合法制备的(AA-AM-C_(18)DMAAC-St)四元共聚感温凝胶微球

Preparation of(AA-AM-C_(18)DMAAC-St)Quaternary Copolymerization Temperature Sensing Gel Microspheres by Antiphase Micro Emulsion Polymerization

以丙烯酰胺(AM)、丙烯酸(AA)、十八烷基二甲基烯丙基氯化铵(C_(18)DMAAC)和苯乙烯(St)为原料,采用反相微乳液聚合法设计制备了新型四元共聚物感温凝胶微球(HWSP)。利用扫描电子显微镜(SEM)和傅里叶变换红外光谱仪(FTIR)等方法表征了聚合物的微观形貌和结构,并研究了不同原料配比制备的HWSP的吸水性能和暂堵性能。结果表明,感温型暂堵剂HWSP在模拟地层环境条件下能够实现"调而不堵,堵而不死"的要求。当m(C_(18)DMAAC)∶m(AA+AM)∶m(St)为1∶5∶0.55时,暂堵剂的吸水性能最佳,且有一定的耐盐能力和热稳定性。

HWSP,as a new quaternary copolymer temperature sensing gel microsphere,was synthesized through antiphase micro emulsion polymerization by using acrylamide(AM),acrylic acid(AA),octadecyl dimethylallyl ammonium chloride(C_(18)DMAAC)and styrene(St)as material.The morphology and structure of the HWSP were characterized by scanning electron microscopy(SEM)and fourier transform infrared spectrometer(FTIR),and the water absorption and temporary plugging properties of the HWSP were studied under different preparation conditions.Results show that the requirement,adjusting but not blocking,blocking but not dying,of temperature sensitive temporary plugging agent HWSP could be realized under the simulated formation environment conditions;what’s more,the HWSP shows the best water absorption performance,as well as certain salt tolerance and thermal stability under the condition of m(C_(18)DMAAC)∶m(AA+AM)∶m(St)of 1∶5∶0.55.