摘要
用表面张力法研究了十二烷基磺酸钠 (AS)与不同相对分子质量的聚乙二醇 (PEG)或聚乙烯吡咯烷酮 (PVP)间的相互作用。实验结果表明 ,AS与PVP以及与相对分子质量较大的PEG间混合体系的γ -lgc曲线均具有双拐点的特点 ,为拟双平台型曲线。但AS与低相对分子质量的PEG2 0 0 0及PEG40 0混合体系的γ -lgc曲线却没有出现明显的双拐点现象 ,其曲线表现为拐点偏离CMC的单平台型曲线。从表象上看 ,AS -PEG、AS -PVP体系中的分子间相互作用与SDS-PEG、SDS -PVP体系中的分子间相互作用没有根本区别。
The interactions between sodium dodecanesulfonate (AS) and polyethyleneglycol (PEG) or polyvinylpyrrolidone (PVP) with different molecular weights were studied with surface tension method.The experimental results showed that there occurred bis transition points or pseudo double plateau regions on the γ -lg c curves of AS-PVP and of AS-PEG with greater molecular weights.The bis transition points do not appear on the γ -lg c curves of AS-PEG400 and AS-PEG2000 and the shape of these curves is similar to the single plateau curve of AS but on which the transition points deviate from the ordinary CMC of AS.It looks like that there is no essential distinction in the manner of molecular interactions between AS-PEG and SDS-PEG,or between AS-PVP and SDS-PVP systems.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2000年第12期693-695,共3页
Fine Chemicals
基金
高等学校骨干教师资助计划资助课题![教技司 (2 0 0 0 ) 6 5 ]
关键词
十二烷基磺酸钠
聚乙二醇
聚乙烯吡咯烷酮
双拐点
sodium dodecanesulfonate
polyethyleneglycol
polyvinylpyrrolidone
bis transition point
pseudo double plate<
