• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>journal of applied polymer science >Water‐soluble copolymers. XLV. Ampholytic terpolymers of acrylamide with sodium 3‐acrylamido‐3‐methylbutanoate and 2‐acrylamido‐2‐methylpropanetrimethylammonium chloride
【24h】

Water‐soluble copolymers. XLV. Ampholytic terpolymers of acrylamide with sodium 3‐acrylamido‐3‐methylbutanoate and 2‐acrylamido‐2‐methylpropanetrimethylammonium chloride

机译：Water‐soluble copolymers. XLV. Ampholytic terpolymers of acrylamide with sodium 3‐acrylamido‐3‐methylbutanoate and 2‐acrylamido‐2‐methylpropanetrimethylammonium chloride

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

AbstractWater‐soluble, low charge density polyampholytes have been synthesized by free‐radical terpolymerization of acrylamide (AM) with sodium 3‐acrylamide‐3‐methylbutanoate (NaAMB) and 2‐acrylamido‐2‐methylpropanetrimethylammonium chloride (AMPTAC). Terpolymer compositions obtained by13C‐NMR reflect monomer feed concentrations. Molecular weights and second virial coefficients range from 3.43 to 19.4 × 106g/mol and from 1.63 to 3.61 mL mol/g‐2, respectively, as determined by low‐angle laser light scattering. Ionic associations were explored by investigating the dilute solution properties as a function of terpolymer concentration, terpolymer charge density, and added electrolytes. Terpolymers with 0.5, 2.5, and 5.0 mol of both of the cationic (AMTAC) and anionic (NaAMB) monomers were soluble in deionized water, whereas those with 10 and 15 mol of each monomer required electrolyte addition. The higher‐density terpolymers undergo a 700 increase in intrinsic viscosity upon changing NaCl concentration from 0.05 to 1M. Polyelectrolyte behavior could be induced by decreasing solution pH below the pKaof the NaAMB mer. Intermolecular ionic associations resulting in gel networks were studied utilizing dynamic mechanical analysis. ©

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号