The Rheology of Solvent Based Polyacrylate Pressure Sensitive Adhesives
Year: 2012
Type: article
Abstract: The rheology of solvent based polyacrylate pressure sensitive adhesives(PSA) with different molecular weight was studied,the rheological parameters were decided in frequency sweep,amplitude sweep patterns respectively,creep recovery properties were also studied,in this way,as the molecular weights of the PSAs were changed,the elasticity and the viscosity of the PSAs were systematically analysed,which were two of the most important properties of the solvent based polyacrylate PSAs.The results demonstrated that the cross-over frequency(f*) decreased while the zero shear viscosity(η0) and the elasticity increased as the molecular weight of the PSA increased;in amplitude sweep pattern,the linear viscoelastic range(LVE) and the elastic modules(G′) and the viscous modules(G″) also increased as the molecular weight increased,however,the increment of the elastic modules was greater than that of the viscous modules,accordingly,it showed that G′G″ at first and then G′=G″ and G′G″ in the end as the molecular weights of the PSAs were increased,which meant that the rheological behaviours of the PSAs were shifted from viscoelastic fluid to viscoelastic solid;via the creep recovery test,it proved that the increase of the molecular weight plays an important role in the improvement of the creep recovery properties of the PSA,and the creep recovery time was obviously elongated.
Source: Cailiao gongcheng
Institution: Beijing Institute of Aeronautical Materials
Language: English
Subfield: Fluid Flow and Transfer Processes
Field: Chemical Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $581
OpenAlex ID: W2365172641