Surface modification of poly(ethylene terephthalate) film by coating with poly(ethylene glycol)-grafted polystyrene

Abstract

ABSTRACT:The poly(ethylene glycol) (PEG)-grafted styrene (St) copolymer, which was formed as a nanosphere, was used as an agent to modify the surface of poly(ethylene terephthalate) (PET) film. The graft copolymer was dissolved into chloroform and coated onto the PET film by dip-coating method. The coated amount depends on the content ratios of PEG and St, the solution concentration, and the coating cycles. The graft copolymers having a low molecular weight of PEG-or St-rich content was fairly stable on washing in sodium dodecyl sulfate (SDS) aqueous solution. It was confirmed that the PET surface easily altered its surface property by the coating of the graft copolymers. The contact angles of the films coated with the graft copolymers were very high (ca. 105-120°). The coated film has good antistatic electric property, which agreed with PEG content. The best condition of coating is a one-cycle coating of 1% (w/v) graft copolymer solution. The coated surface had water-repellency and antistatic electric property at the same time. The graft copolymer consisted of a PEG macromonomer; St was successfully coated onto PET surfaces, and the desirable properties of both of PEG macromonomer and PSt were exhibited as a novel function of the coated PE film.

Synthesis of a polyester macromonomer via the cobalt‐catalyzed alternating copolymerization of propylene oxide and carbon monoxide

“…Units IV and V were given by the ring opening of THF and the repetitive ring opening of propylene oxide, respectively. The formation of II, III, IV, and V was previously observed for the Co 2 (CO) 8 /amine system, 15 whereas the high content of the terminal crotonate function was characteristic of this NaCo(CO) 4 system. The size exclusion chromatography analysis of the co-oligomer gave a unimodal eluent peak, and the number-average molecular weight (M n ; g/mol) and weight-average molecular weight/number-average molecular weight (M w /M n ) values with polystyrene standards were shown to be 750 and 1.27, respectively.…”

“…The calculated molecular weight (M calcd ) of the co-oligomer was also estimated to be 1230 through the calculation of the ratio of the 1 H NMR signal areas under the assumption that all the oligomer chains had the terminal crotonate group. These results indicate that each cobalt species produced several oligomer chains and 4 (0.25 mmol), and an additive (0.25 mmol) in THF (5 mL) at 75°C (runs 1-7), or propylene oxide (16 mmol), carbon monoxide (6.0 MPa), Co 2 (CO) 8 (0.16 mmol), and an additive (0.32 mmol) in THF (5 mL) at 75°C (runs 8 -10).…”

“…Our investigation of the copolymerization of propylene oxide and CO was focused on the use of NaCo(CO) 4 , which has been rarely employed in this reaction. 13 The copolymerization of propylene oxide (25 mmol) and CO (6.0 MPa) was carried out with NaCo(CO) 4 (1 mol%) in THF (5 mL) at 75°C for 22 h (Table 1, run 1). The 1 H NMR spectrum of the crude product showed that it contained the oligoester and a small amount of ␤-butyrolactone and crotonic acid.…”

“…Macromonomers are also copolymerized with other monomers to produce graft copolymers or more complex architectures. These kinds of polymers have unique properties that are unable to be achieved with traditional linear or branched polymers, and so they can be applied to several uses, such as coatings, 4,5 impact-resistant plastics, 6 unimolecular micelles for drag delivery, 7 and molds for inorganic material synthesis. 8 Because the properties of poly(macromonomer)s largely depend on the structures of the macromonomers, a facile synthetic method for welldefined macromonomers is required for the development of new polymeric materials.…”

Pharmaceutical development of IPI‐504, an Hsp90 inhibitor and clinical candidate for the treatment of cancer

“…Macromonomers are also copolymerized with other monomers to produce graft copolymers or more complex architectures. These kinds of polymers have unique properties that are unable to be achieved with traditional linear or branched polymers, and so they can be applied to several uses, such as coatings,4, 5 impact‐resistant plastics,6 unimolecular micelles for drag delivery,7 and molds for inorganic material synthesis 8. Because the properties of poly(macromonomer)s largely depend on the structures of the macromonomers, a facile synthetic method for well‐ defined macromonomers is required for the development of new polymeric materials.…”