Thermoreversible gelation in solutions of associating polymers. 2. Linear dynamics
Thermoreversible gelation in solutions of associating polymers. 2. Linear dynamics
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DOI：
10.1021/ma970617
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发表时间：
1998-02-24
期刊：
影响因子：
5.5
通讯作者：
Semenov, AN
中科院分区：
文献类型：
--
作者：
Rubinstein, M;Semenov, AN
在Rouse-Zimm（非缠结）制度下，理论上考虑了缔合聚合物溶液中形成的可逆网络的粘弹性。它示出的动力学主要是由网络链的大小和可逆的交界处的有效寿命。被认为是频率和浓度依赖性的粘度和动力学模量。一种新的模型，考虑到多重解离和重组的可能性，同一对贴纸的开发。结果表明，这种效果引起的表观活化能的增加，这是预测将大大大于引发活化能的两个贴纸的解离。
Viscoelastic properties of reversible networks formed in solutions of associating polymers are considered theoretically in the Rouse-Zimm (unentangled) regime. It is shown that the dynamics is governed primarily by the network strand size and by the effective lifetime of reversible junctions. Both frequency and concentration dependencies of viscosity and dynamical moduli are considered. A novel model taking into account the possibility of multiple dissociation and recombination of the same pair of stickers is developed. It is shown that this effect gives rise to an increase of the apparent activation energy which is predicted to be substantially larger than the priming activation energy for dissociation of two stickers.