Viscoelastic Properties of Tightly Entangled Semiflexible Polymer Solutions
Viscoelastic Properties of Tightly Entangled Semiflexible Polymer Solutions
复制标题
紧密缠结的半柔性聚合物溶液的粘弹性
DOI：
10.1021/acs.macromol.8b01582
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发表时间：
2018
期刊：
影响因子：
5.5
通讯作者：
Inoue Tadashi
中科院分区：
文献类型：
--
作者：
Okada Yuki;Goto Yuka;Tanaka Reina;Katashima Takuya;Jiang Xinyue;Terao Ken;Sato Takahiro;Inoue Tadashi
的动态粘弹性和双折射的良好表征的半柔性聚合物溶液-纤维素三（苯基氨基甲酸酯）/磷酸三甲苯酯的解决方案-进行了研究，在一个广泛的浓度范围从稀到紧密纠缠制度的纠缠间距小于库恩段的大小。应力光学规则并不成立，在紧密纠缠的制度，表明应力的分子起源不是简单地归因于链段的取向，但链的弯曲，这并不有助于双折射显着。在高频率下，观察到的幂律行为与指数3/4，由于拉伸应力的复杂的剪切模量在所有的浓度。
The dynamic viscoelasticity and birefringence of well-characterized semiflexible polymer solutions—cellulose tris(phenyl carbamate)/tricresyl phosphate solutions—were investigated over a wide concentration region ranging from a dilute to a tightly entangled regime where the entanglement spacing is smaller than the Kuhn segment size. The stress optical rule did not hold true in the tightly entangled regime, indicating that the molecular origin of stress is not simply attributed to the orientation of segments but to the bending of chains, which does not contribute to birefringence significantly. At high frequencies, the power law behavior with the exponent 3/4 due to the tension stress was observed for the complex shear moduli at all the concentrations.