SOLUTION PROPERTIES AND SELF-ASSOCIATION OF MULTI-BLOCK COPOLYMER P(AM/AA) PREPARED BY TEMPLATE COPOLYMERIZATION

ZHANG Yuxi; WU Feipeng; LI Miaozhen; WANG Erjian

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SOLUTION PROPERTIES AND SELF-ASSOCIATION OF MULTI-BLOCK COPOLYMER P(AM/AA) PREPARED BY TEMPLATE COPOLYMERIZATION

Research Article | 更新时间：2021-03-19

- SOLUTION PROPERTIES AND SELF-ASSOCIATION OF MULTI-BLOCK COPOLYMER P(AM/AA) PREPARED BY TEMPLATE COPOLYMERIZATION
- Acta Polymerica Sinica Issue 5, Pages: 666-670(2006)
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- Published：20 August 2006，
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ZHANG Yuxi, WU Feipeng, LI Miaozhen, WANG Erjian. SOLUTION PROPERTIES AND SELF-ASSOCIATION OF MULTI-BLOCK COPOLYMER P(AM/AA) PREPARED BY TEMPLATE COPOLYMERIZATION. [J]. Acta Polymerica Sinica (5):666-670(2006)
DOI：

ZHANG Yuxi, WU Feipeng, LI Miaozhen, WANG Erjian. SOLUTION PROPERTIES AND SELF-ASSOCIATION OF MULTI-BLOCK COPOLYMER P(AM/AA) PREPARED BY TEMPLATE COPOLYMERIZATION. [J]. Acta Polymerica Sinica (5):666-670(2006) DOI：

摘要

研究了模板法合成多嵌段状丙烯酰胺(AM)和丙烯酸(AA)共聚物(简称模板共聚物TP)在水溶液中的溶液性质和缔合作用.结果表明

模板共聚物具有明显的结构效应.不同于无模板参与聚合的无规共聚物(CP)

模板共聚物随着溶液pH的降低或加入多价金属离子容易发生相分离.透射电子显微镜(TEM)表明

加入Ca2+离子后

聚合物形成了大的分子间交联体

且随着Ca2+离子浓度的增加

交联程度增加

致使溶液产生相分离.随着溶液pH的升高

模板共聚物溶液粘度变化与丙烯酸均聚物具有相同的规律

都是先增大后减小

粘度有一个最大值

但模板共聚物溶液粘度升高幅度更大.TEM表明在粘度最大处形成了带状分子间缔合体.

Abstract

The association and properties of multi—block eopolymers(TP)of acrylamide(AM)and acrylic acid (AA)prepared by template copolymerization in aqueous solution were studied．The results showed that the copolymers of this type exhibited a significant structure effect compared with that of similar random copolymers(CP) obtained by copolymerization in the absence of template．Decrease the pH or add Ca2+ to the copolymer solution may cause phase separation．The TEM images demonstrated that the phase separation by adding Ca2+ was due to the formation of extensive intermolecular cross-linking．With increasing the pH of the copolymer solution the solution viscosity increased first and then decreased similar with that of the homopolyacrylie acid．However the increase range of template copolymer was higher than that of homopolyacrylic acid．TEM images indicated that at the maximal viscosity the template copolymer exhibited coiled aggregates．

关键词

P（AM/AA）模板共聚物结构效应缔合作用相分离

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