摘要
考察了溶液浓度对PAC以及PAC／HPMC水溶液动态粘弹性的影响。结果表明，溶液储能模量（G’），耗能模量（G”）均随溶液浓度的增大而增大，但储能模量随频率增大的幅度大于耗能模量随频率增大的幅度；溶液的损耗角正切（tanδ）值随浓度增大而逐渐减小；G’-f与G”-f两曲线交点随溶液浓度增大向低频方向移动；由于PAC与HPMC分子间存在氢键作用，因此，与纯PAC溶液相比，相同浓度下PAC／HPMC水溶液的G’-f与G”-f交点对应的频率更高；ω=0相对应的初始tanδ值比同浓度下纯PAC溶液更高。
Effect of solution concentration on dynamic viscoelasticity of PAC and PAC/HPMC aqueoes solution were studied. The results showed that with increasing of solution concentration, the storage modules （G＇） ,loss modulus （G”） increased,but the G＇ increased more rapidly than G”. In the meantime loss tangent tan δ decreased. G＇ - f, G” - f curves intersected at lower frequency ; Compared with that of the same concentration PAC solution, the G＇ - f, G” - f curves of PAC/HPMC solution intersected at higher frequency due to hydrogen bonds between HPMC and PAC chains, and the initial tan δ （ω = 0） was higher than that of PAC.
出处
《应用化工》
CAS
CSCD
2008年第7期799-801,共3页
Applied Chemical Industry
