Synthesis and characterization of novel ABA type poly(Ester-ether) triblock copolymers


Catiker E., Ozturk T., ATAKAY M. , SALİH B.

JOURNAL OF POLYMER RESEARCH, cilt.26, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 26 Konu: 5
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1007/s10965-019-1778-5
  • Dergi Adı: JOURNAL OF POLYMER RESEARCH

Özet

Oligomers of poly(3-hydroxypropionate) (P3HP) were synthesized via hydrogen transfer polymerization of acrylic acid. Olefinic end-group of the oligomers were modified through epoxidation and bromination to obtain activated oligomers with epoxy and bromide end-groups, respectively. Terminally hydroxyl oligomeric poly(ethylene glycol) (PEG-1450) was also converted to sodium alkoxide of PEG-1450 through reaction with sodium hydride. Novel ABA type P3HP-b-PEG-b-P3HP triblock copolymers were successfully obtained through simple nucleophilic addition reactions between alkoxy and epoxy/alkyl bromide. Water uptake measurements of the triblock copolymers were calculated. Characterization of the modified oligomers and the triblock copolymers was performed by using FT-IR, H-1-NMR and MALDI-MS analyses. Thermal transitions and degradation features of the copolymers were investigated by using DSC and TGA methods. Spectroscopic and thermal analyses revealed that both end-group modifications and coupling reactions were successfully achieved.