环糊精改性超支化聚合物的合成与性能评价

Synthesis and performance evaluation of cyclodextrin modified hyperbranched polymer

摘要:

以丙烯酰胺（AM）、丙烯酸（AA）、环糊精改性超支化功能单体（MAH-β-CD-HPEA）、甜菜碱(DEPS)为原料合成了四元共聚物PADAH。考察了引发剂质量分数、AM与AA质量比、DEPS与MAH-β-CD-HPEA质量比对聚合物溶液黏度的影响。最佳合成条件为：AM与AA的质量比为2:1（共占单体总质量的85%），DEPS与MAH-β-CD-HPEA的质量比为14.5:0.5（共占单体总质量的15%），引发剂质量分数为0.3%。性能研究表明，该共聚物的质量浓度为2000 mg/L时，溶液黏度可达647 mPa•s，3500 r/min 剪切20s后黏度保留率高于80%；90℃时，PADAH的黏度为237 mPa•s，黏度保留率为37.5%，均优于PADA（无超支化单体）和普通部分水解聚丙烯酰胺（HPAM）。

Abstract:

A hyperbranched polymer PADAH was synthesized by acrylamide(AM), acrylic acid(AA), cyclodextrin-modified hyperbranched functional monomer (MAH-β-CD-HPEA) and betaine (DEPS). The effects of initiator dosage, mass ratio of AM and AA, mass ratio of DEPS and MAH-β-CD-HPEA on the polymer solution viscosity were investigated. The results indicated that the optimum polymerization conditions were obtained as follows: initiator dosage of 0.3%, m(AM):m(AA)=2:1(85% of the total mass of the monomer),m(DEPS):m( MAH-β-CD-HPEA)=14.5:0.5(15% of the total mass of the monomer). The solutions properties of PADAH were evaluated. The results showed that the viscosity of 2000 mg/L polymer solution could reach 647 mPa•s, and the viscosity retention rate after shearing for 20 s was more than 80%, at 90°C, the viscosity of PADAH was 237 mPa•s and the viscosity retention rate was 37.5%, Compared with PADA(no hyperbranched functional monomer) and the partially hydrolyzed polyacrylamide (HPAM), PADAH has better solution properties.