Asymmetric Bihomologous Crosslinkers for Bicomponent Gels-The Way to Strongly Increased Elastic Moduli

作者：Demirgoz Doene; Navarro Rodrigo; Perez Monica; Reinecke Helmut; Gallardo Alberto^*

来源：Journal of Applied Polymer Science, 2010, 115(2): 896-900.

DOI：10.1002/app.31086

• bicomponent networks
• copolymerization
• crosslinking
• reactivity

2-Hydroxyethylmethacrylate (HEMA) and acrylamide (AA) have been copolymerized via free radical mechanism, in the presence of 5 mol % of four different crosslinker systems, the symmetric ethylenglycoldimethacrylate (EGDMA), bisacrylamide (BIS), a mixture of EGDMA and BIS, and the asymmetric acrylamideethylen-methacrylate (METAA). The polymerizations have been monitored with a rheometer, exhibiting the gel obtained with the asymmetric METAA, an elastic modulus that is dramatically increased compared with those of the gels prepared with the other three crosslinker systems. A kinetic analysis using the terminal model has been used to build probabilistic surfaces that give information about how the crosslinker is incorporated into the network. This analysis shows a high dissimilarity between the reactions using the asymmetric and the mixture of symmetric cross-linkers, what has been correlated to the difference in modulus.

• 出版日期2010-1-15