Abstract
A family of precisely defined amphiphilic polyethylene-g-poly(ethylene glycol) copolymers has been synthesized using ADMET polycondensation chemistry. Altering the graft distribution and graft end group controls the morphology of the material: the polymers can be either semicrystalline or rendered completely amorphous. The precise monomer structures have been confirmed by 1H and 13C NMR, high-resolution mass spectrometry, and elemental analysis; the corresponding polymer structures have been confirmed by 1H and 13C NMR and FTIR. Melting temperatures can be controlled over a 60 °C range and glass transition temperature over 40 °C. Melting temperatures are incident with n-paraffin molecules having lengths similar to the static methylene sequence length between PEG branches. The observed thermal data are attributed to the crystallization of the polyethylene backbone, resulting in the exclusion of the PEG branches from the crystal, a result confirmed by X-ray diffraction.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
