Influence of Monomer Structure, Initiation, and Porosity on Mechanical and Morphological Characteristics of Thiol‐ene PolyHIPEs

Combining high internal phase emulsion templating with thiol-ene click chemistry produces porous polymers yields and degradable ester linkages. This study compares the influence of monomer functionalities (tri versus tetra), volume, initiation type (photo thermal) on morphological mechanical properties poly(high emulsions) (polyHIPEs). For synthesis polyHIPEs pentaerythritol tetrakis(3-mercaptopropionate) (PETMP, tetrafunctional), trimethylolpropane tris(3-mercaptopropionate) (TMPTMP, trifunctional), tetraacrylate (PETA, triacrylate (TMPTA, trifunctional) are used. The main factors influencing structures while influences morphology trifunctional system (pore size type) resulting in an interconnected cellular all cases except case photopolymerization 85 vol% phase. average pore diameter ranges from 8.0 to 27.8 µm, for tetrafunctional it 8.1 12.3 µm. compression moduli range 0.093 0.240 MPa they 1.906 7.670 MPa. decrease increasing volume (porosity).