A series of amphiphilic polymer conetworks(APCNs) composed of poly(ethylene oxide)(PEG) and poly(p-dioxanone)(PPDO) segments were synthesized and characterized.Four-arm star-shaped poly(pdioxanone)(4sPPDO) precursor with hydroxyl terminal group was prepared by ringopening polymerization of PDO using stannous 2-ethylhexanoate ［Sn(Oct)2］ as a catalyst and pentaerythritol(PTOL) as initiator.Amphiphilic PPDO-b-PEG conetworks were prepared by directly coupling reaction of the hydroxyl group terminated 4s-PPDO and PEG precursors using toluene 2

4-diisocyanate(TDI) as chain extender.The influences of molecular structure

type of solvents on the swelling ratio of the amphiphilic PPDO-b-PEG conetworks were studied.The co-continuity of the conetworks was characterized via swelling in chloroform

tetrahydrofuran and H2O

respectively

and the results show that amphiphilic PPDO-b-PEG polymer networks had different swelling behaviors in different solvents

which were determined by the dosage of coupling agent and feed ratio of PPDO/PEG.The crystalline behaviors of copolymers were studied by differential scanning calorimetry (DSC).The results indicated that compositions of PPDO and PEG and the degree of crosslinking

which were obtained by using various amount of TDI

had an important influence on the thermal and crystalline behaviors such as melting temperature(Tm)

crystallizing temperature(Tc)

melting enthalpy(Hm)

crystallizing enthalpy(Hc)

and degree of crystallinity.The crosslinking structure limited the crystallization of PEG segments

resulting in decreased relative degree of crystallization and crystal size.