The title block copolymer (defined as PSUEA) containing pendant

self-complementary quadruple hydrogen bonding sites has been prepared successfully by three steps. First

poly(styrene-b-2-hydroxyethyl acrylate) (defined as PSHEA) was prepared by living radical polymerizing 2-hydroxyethyl acrylate (HEA) initiated by polystyrene (PSt) macro-initiator

which was prepared via nitroxide-mediated polymerization (NMP) technique. After treated by excessive 3-isocyanatomethyl-3

5

5-trimethylcyclohexyl isocyanate (IPDI)

PSHEA was transferred into an intermediate polymer (defined as PSIEA) with isocyanate groups in the second block. Finally

PSIEA was reacted with excessive 2-amino-4-hydroxy-6-methyl-pyrimidone (MIS) to obtain PSUEA bearing pendant quadruple hydrogen bonding 2-ureido-4[1H]-pyrimidone (Upy) units. Based on 1H-NMR

FT-IR and GPC analysis

all the polymers with well controlled structures were obtained. Preliminary thermal analysis of the block polymers indicated that the introduction of Upy units significantly increased the glass transition temperature. The possibility to form quadruple hydrogen bonding should make PSUEA suitable as new building component for supramolecular assembling.