Swelling of polymer networks with topological constraints: Application of the Helmis-Heinrich-Straube model

eXPRESS Polymer Letters

B. Basterra-Beroiz¹ 

关键词: rubber;    swelling;    entanglements;    tube model;    cross-link density;   

DOI  :  10.3144/expresspolymlett.2018.62

学科分类：生物科学（综合）

来源: eXPRESS Polymer Letters

【 摘 要 】

For the first time since its formulation in 1986, the theoretical approach proposed by Helmis, Heinrich and Straube(HHS model), which considers the contribution of topological restrictions from entanglements to the swelling of polymernetworks, is applied to experimental data. The main aspects and key equations are reviewed and their application is illustratedfor unfilled rubber compounds. The HHS model is based on real networks and gives new perspectives to the interpretationof experimental swelling data for which the entanglement contributions are usually neglected by considering phantom networkmodels. This investigation applies a reliable constrained-chain approach through a deformation-dependent tube modelfor defining the elastic contribution of swollen networks, which is one of the main limitations on the applicability of classical(affine) Flory-Rehner and (non-affine) phantom models. This short communication intends to provide a baseline for the applicationand validation of this modern approach for a broader class of rubber materials.

【 授权许可】

CC BY