The　polymerization　of　methyl　acrylate　and　styrene　in　the　presence　of　1,1-diphenylethylene　(DPE)　is　investigated　to　monitor　the　impact　of　different　monomers　on　the　structure　of　DPE-containing　polymers.　Poly(methyl　acrylate)　(PMA)　and　polystyrene　(PSt)　with　low　molecular　weight　are　synthesized　and　characterized.　According　to　the　results　of　the　H-1　nuclear　magnetic　resonance　(H-1-NMR)　spectroscopy,　DPE　is　incorporated　into　PMA　and　PSt　polymer　chains　as　diphenyl-substituted　structure.　The　resulting　PMA　polymers　containing　only　one　DPE　unit　show　good　agreement　with　the　mass　spectrometry　results　obtained　by　electrospray-ionization　quadrupolar　time-of-flight　mass　spectrometry.　The　gel　permeation　chromatography　results　of　PSt　polymers　are　consistent　with　the　molecular　weight　obtained　by　H-1-NMR,　indicating　that　each　PSt　polymer　chain　has　only　one　DPE　molecule.