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Synthesis of amphiphilic poly(cyclooctene)-graft-poly(ethylene glycol) copolymers via ROMP and its surface properties
Synthesis of amphiphilic poly(cyclooctene)-graft-poly(ethylene glycol) copolymers via ROMP and its surface properties
Macromonomer cyclooctene-poly(ethylene glycol) (cyclooctene-PEG) was first synthesized beforebeing copolymerized with cyclooctene by ring opening metathesis polymerization (ROMP) to obtain anamphiphilic graft copolymer (poly(cyclooctene)-g-PEG) with polycyclooctene as the hydrophobictrunk chain and PEG as hydrophilic side chains. The structure of poly(cyclooctene)-g-PEG copolymerwas characterized by FTIR and 1H-NMR. The surface properties of poly(cyclooctene)-g-PEG filmwere evaluated through water contact angle and X-ray photoelectron spectroscopy (XPS). Watercontact angle decreased from 87.7 to 65.8 along with increasing the content of PEG. Proteinadsorption results showed that poly(cyclooctene)-g-PEG copolymers had significant effect onpreventing bovine serum albumin (BSA) from absorbing onto the polymer surface.
