Investigation of Mechanical Properties and Swelling of Scale-Free Polymer Networks
American Journal of Physical Chemistry
Volume 3, Issue 5, October 2014, Pages: 84-88
Received: Oct. 28, 2014; Accepted: Nov. 5, 2014; Published: Nov. 20, 2014
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Author
Dmitriy V. Pleshakov, Mendeleyev University, Miusskaya pl. 9, Moscow, 125047 Russia
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Abstract
We studied experimentally and theoretically how the network topology influences the mechanical properties and swelling of polymer networks. The properties of monofunctional and polyfunctional networks were compared. The cross-link functionality distribution of the polyfunctional networks is a power function. Such networks are also called scale-free networks. The ultimate tensile strength and ultimate tensile strain of a polyfunctional network appeared to be 1.4 and ~2 times as high as the respective parameters for a monofunctional network. For assessing the long-term strength of polymer networks, we used cyclic straining. The number of cycles from the onset of an experiment to the breakdown of the test sample for a scale-free polymer network was 56 to 60 times the number of cycles for a monofunctional network. We used the lattice-type model of solutions and derived an equation relating the chemical potential of the solvent or plasticizer in a swollen scale-free polymer network to the network parameters and the volume fraction of the polymer. The experimental results verified the validity of our theoretical analysis.
Keywords
Polymer, Network Topology, Scale-Free Networks, Mechanical Properties, Swelling of Polymer Networks
To cite this article
Dmitriy V. Pleshakov, Investigation of Mechanical Properties and Swelling of Scale-Free Polymer Networks, American Journal of Physical Chemistry. Vol. 3, No. 5, 2014, pp. 84-88. doi: 10.11648/j.ajpc.20140305.16
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