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Nowy sposob syntezy hydrofobowo modyfikowanego poli(kwasu akrylowego)

机译：合成疏水改性聚丙烯酸的新方法

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A new method of the synthesis of hydrofobically modified poly(acrylic acid)(HMPAA)(Scheme A)is based on a dissolution of initial poly(acrylic acid)(PAA)in thionyl chloride,which at temp.60 degC reacts with COOH groups so the chloroyl groups COC1 create.Chloroyl groups were subjected to partial amidation with dodecylamine and then the unreacted COC1 groups were hydrolized to the carboxyl groups.HMPAA obtained this way contained 2.55%of nitrogen and in aqueous solutions(0.1 M NaCl)showed,in viscometric measurements,the behavior being characteristic for amphiphylic polymers.It means the dependence eta_(sp)/c = f(c)(Fig.2)significantly deviates from a straight line in contrast to the initial PAA(Fig.1).Further confirmation of an amphiphylic character of HMPAA is the decrease in surface tension of water from 72.7 mN/m(just water)to 42 mN/m(1%solution of HMPAA),at temp.25 degC.~(13)C NMR spectra of PAA and HMPAA(Fig.4 and 5)were interpreted.In HMPAA spectrum there are additional signals coming from carbon atom of CONH group and from C atoms of aliphatic chain from dodecylamine.An explanation of the differences of the courses of curves of potentiometric titration of PAA and HMPAA(Fig.6 and 7)is also given.
机译：一种合成氢氟改性聚丙烯酸（HMPAA）的新方法（方案A）是基于初始聚丙烯酸（PAA）在亚硫酰氯中的溶解，该聚丙烯酸在60℃时与COOH基反应用十二烷基胺对氯酰基进行部分酰胺化反应，然后将未反应的COC1基团水解为羧基。以这种方式制得的HMPAA含有2.55％的氮，并在水溶液（0.1 M NaCl）中显示粘度测量，这是两亲性聚合物的特征。这意味着与初始PAA（图1）相比，eta_（sp）/ c = f（c）（图2）的依赖性显着偏离直线。确认HMPAA的两亲特性是在25°C〜（13）C NMR光谱下，水的表面张力从72.7 mN / m（仅水）降至42 mN / m（1％HMPAA溶液）。解释了PAA和HMPAA的关系（图4和5）。在HMPAA频谱中，还有其他信号从CONH基团的碳原子和十二烷基胺的脂族链的C原子得到ng.PAA和HMPAA的电位滴定曲线的变化曲线也作了解释（图6和7）。

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