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Poly(methyl methacrylate) (PMMA) and poly(ethylene glycol) methyl ether 10 (mPEG)-based monotelechelics were quantitatively prepared by copper (I)-catalyzed 11 azide/alkyne cycloaddition (CuAAC) click reactions using azido-terminated polymers 12 and alkyne functional benzodioxinones. The monotelechelic containing dimethyl 13 moities (2,2-dimethyl-5-(prop-2-yn-1-yloxy)-4H-benzo[d][1,3]dioxin-4-one) was heat-14 sensitive, whereas the monotelechelic containing diphenyl moieties (2,2-diphenyl-5-15doi:10.3906/kim-2104-22 fatcat:ldobhzpbpvel3bjpiijzjwczei