Covalent Incorporation of SiO2 Nanoparticles in CO2-Based Copolymers: Synthesis, Characterization, Morphology and Property Studies.
A new strategy has been developed for covalent incorporation of SiO2 nanoparticles (N-'s) in the CO2-based copolymer, poly(propylene carbonate-co-propylene oxide) (poly(PC-co-PO)). The poly(PC-co-PO)-g-SiO2 nanocomposites was prepared by the combination of epoxy-CO2 ring-opening polymerization and the condensation reaction of chloride and hydroxyl groups of the polymer and the SiO2 surface. FT-IR and NMR were employed for the characterization of the copolymers as well as nanocomposites. A uniform and spherical core-shell structure of poly(PC-co-PO)-g-SiO2 nanocomposites was demonstrated from TEM and SEM images. An improved thermal property of the polymer matrix with incorporating SiO2 nanoparticles was revealed by TGA study. The grafting of poly(PC-co-PO) considerably prevented the aggregation and improved the dispersibility of SiO2 nanoparticles in toluene.
Thi Nga
TN
Tran
Thanh Binh
TB
Mai
Long Giang
LG
Bach
Md Rafiqul
MR
Islam
Yeong Soon
YS
Gal
Kwon Taek
KT
Lim