Leibniz Institute of Polymer Research, D-01069 Dresden, Germany.
Department of Physics, Institute of Theoretical Physics, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa.
J Chem Phys. 2018 Jun 28;148(24):244901. doi: 10.1063/1.5019277.
In this paper, we study a system of entangled chains that bear reversible cross-links in a melt state. The cross-links are tethered uniformly on the backbone of each chain. A slip-link type model for the system is presented and solved for the relaxation modulus. The effects of entanglements and reversible cross-linkers are modelled as a discrete form of constraints that influence the motion of the primitive path. In contrast to a non-associating entangled system, the model calculations demonstrate that the elastic modulus has a much higher first plateau and a delayed terminal relaxation. These effects are attributed to the evolution of the entangled chains, as influenced by tethered reversible linkers. The model is solved for the case when the linker survival time τ is greater than the entanglement time τ, but less than the Rouse time τ.
在本文中，我们研究了在熔融状态下带有可逆交联的纠缠链系统。交联均匀地束缚在每条链的主链上。提出了一种针对该系统的滑链模型，并对松弛模量进行了求解。将缠结和可逆交联剂的影响建模为影响原始路径运动的离散形式的约束。与非缔合缠结系统相比，模型计算表明弹性模量具有更高的第一平台和延迟的末端松弛。这些效应归因于受束缚的可逆连接剂影响的缠结链的演化。当连接生存时间τ大于缠结时间τ但小于罗瑟时间τ时，对模型进行了解决。
