【摘要】 以丙烯酰胺(AM)、双丙酮丙烯酰胺(DAAM)、N-乙烯基-2-吡咯烷酮(NVP)为原料,采用水溶液聚合法合成了三元共聚物P(AM-DAAM-NVP),表征了其红外光谱特征;研究了它的热稳定性能和其溶液的特性黏数随温度的变化。结果表明,当m(AM)∶m(DAAM)∶m(NVP)=7.5∶2.0∶1.5,w(引发剂)=0.4%,聚合反应温度60℃时,得到的三元共聚物的半分解温度(T1/2)为390℃,比聚丙烯酰胺提高了14.3%;它在350℃时的失重速率(K350)为1.0%/m in,较聚丙烯酰胺的K350(1.43%/m in)下降了30.1%,耐热抗盐性能优于聚丙烯酰胺(PAM);该三元共聚物黏度保留值(B.R)均大于0.75,最大可达0.97,远大于相同条件下的聚丙烯酰胺黏度保留值(最大为0.55)。更多还原

【Abstract】 A new type of terpolymer,denoted as P（AM-DAAM-NVP）,was synthesized by aqueous solution copolymerization of acrylamide（AM）,diacetone acrylamide（DAAM） and N-vinyl-2-pyrrolidinone（NVP）.Factors influencing the characteristic viscosity [η] of terpolymer including temperature and solvent were investigated.Structure of the terpolymer was identified by characteristic absorption peaks in its IR spectrum and heat stability of the terpolymer was studied by TGA.T_1/2 of the terpolymer is 390 ℃,indicating an increase of about 14.3% as compared with that of polyacrylamide（PAM）,and K₃₅₀ of the terpolymer is 1.0%/min,which has decreased by 30.1%.At the same time,the value of retention brine（B.R） of the terpolymer is 0.75⁰.97.Hence,the terpolymer overmatches PAM in temperature-resistant and salt-tolerant properties.更多还原