Abstract
In order to improve mechanical properties of polyurethane, hyperbranched interpenetrating network(H-IPN) was achieved by incorporating hyperbranched polyethrs into polyether-Urethane that derived from hydroxyl terminated ethylene oxide tetrahydrofuran copolyether (PET) and isophorone diisocyanate (IPDI). It was found that H-IPN exhibited dual-phase morphology, and hydrogen bonding was formed between hyperbranch polyether and polyether-Urethane. H-IPN shows synergetic effect, the tensile strength of H-IPN increased from 1.39MPa of neat polyether-Urethane to 2.67 MPa; Meanwhile, the elongation increased from 605% of control sample to 2304%.
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