含氯对位芳香族聚酰胺溶液流变特性研究  

Study on rheological behavior of chlorinated para-aromatic polyamide solution

作　　者：鲁超风 陈蕾[1] 严冬东 于俊荣[1] 诸静[1] 王彦[1] 胡祖明[1] 

机构地区：[1]东华大学材料科学与工程学院纤维材料改性国家重点实验室,上海201620

出　　处：《合成纤维工业》2014年第3期1-5,共5页China Synthetic Fiber Industry

基　　金：国家973计划资助项目(2011CB606103);国家863计划项目(2012AA03212)

摘　　要：采用ARES-RFS流变仪研究了低温缩聚法制备的含氯对位芳香族聚酰胺(Cl-PPTA)溶液的流变特性,讨论了Cl-PPTA浓度、Cl-PPTA相对分子质量及温度对溶液流变特性的影响,并运用Cox-Merz关系式研究了稳态剪切粘度(ηa)和动态复数黏度(η*)的相互关系。结果表明:Cl-PPTA溶液为切力变稀的非牛顿流体;随着溶液中Cl-PPTA浓度和相对分子质量的增加,温度的降低,溶液的非牛顿性增加;Cl-PPTA浓度越高,相对分子质量越大,则溶液黏流活化能(△Eη)越大;随着Cl-PPTA浓度和相对分子质量增加,相应的储能模量(G')、损耗模量(G″)和η*越大;Cl-PPTA溶液浓度或温度增大时,在一定的剪切速率(γ)和角频率(ω)范围内,ηa和η*两曲线出现了重叠区域,仅在较高或较低的γ和ω时,两曲线出现偏离,Cl-PPTA溶液的流变特性符合Cox-Merz关系式。The rheological behavior of chlorinated para-aromatic polyamide （CI-PPTA） solution prepared by low-temperature polycondensation was studied with an ARES-RFS rheometer. The effects of Cl-PPTA concentration, relative molecular mass and temperature on the rheological behavior of the solution were discussed. The correlation between steady shearing viscosity （ ηa ） and dynamic complex viscosity （ η^ ＊ ） was studied by Cox-Merz rule. The results showed that Cl-PPTA solution belonged to a shear thinning non-Newtonian fluid ; the non-Newtonian behavior of the solution was increased while increasing the concentration and relative molecular mass or decreasing the temperature of Cl-PPTA solution; the higher the Cl-PPTA concentration or relative molecular mass was, the higher the viscous flow activation energy （ △Eη ） of the solution was ; the storage modulus （ G＇ ） , loss modulus （ G＂ ） and η ＊ were increased when the Cl-PPTA concentration and relative molecular mass were increased ; the curves of ηa and η^＊ tended to be coincidence in a specific range of shearing rate （ γ ） and angular frequency （ ω）, but to deviate only at relatively high or low γ and ω while increasing Cl-PPTA solution concentration or temperature ; Cox-Merz rule was valid to the rheological behavior of Cl-PPTA solution.

关 键 词：含氯对位芳香族聚酰胺 流变特性非 牛顿指数 黏流活化能 

分 类 号：TQ342.72[化学工程—化纤工业]