Investigating the surface photografting polymerization of styrene (St), it
was found that in the absence of photoinitiator and at high temperatures, a
remarkable amount of St-grafted polymer is formed. The initiation performa
nce of St was further confirmed by surface photografting polymerization of
acrylic acid, where St was used as the photoinitiator. This finding is usef
ul to investigate the reaction mechanism of aromatic compounds under UV rad
iation and develop photoinitiator-free polymerization systems.