Sole-Component Visible Macrophotoinitiators with Si-H: Decreased Oxygen Inhibition and Modified Cured Polymer Materials

摘要

abstract_textpThree polymethylhydrosiloxane (PMHS)-modified thioxanthone (TX) visible macrophotoinitiators (TX-PMHSs) were designed and prepared by the partially hydrosilylation of 2-allyl(methyl)amino-9H-thioxanthen-9-one (TX-A) and PMHS. Their characteristics of photopolymerization, photolysis, reduction of oxygen inhibition and the modification of the polymer materials were discussed. As sole-component visible photoinitiators, TX-PMHSs could even initiate 1, 6-hexanedioldiacrylate (HDDA) polymerization in the air atmosphere. Moreover, TX-PMHSs changed the surface wettability property of the cured polyurethane diacrylate prepolymer (PUA) film, and improved the thermal stability of the polymer network. Thus, this work provided an efficient strategy to decrease oxygen inhibition and improve the cured polymer material properties./p/abstract_text