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We present here the application of in situ cascade polycondensation-coupling ring-opening polymerization (PROP) method for the facile synthesis of a series of three-component poly(butylene terephthalate)-block-poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) multiblock terpolymers (PBT-b-PEO-b-PPO-b-PEO-b-PBT)n, using cyclic oligo(butylene terephthalate)s (COBTs) as monomers...
We presented here the synthesis of poly(butylene terephthalate) (PBT) and poly(ethylene oxide) (PEO) alternating multiblock copolymers (mBCPs), (PBT-b-PEO-b-PBT)n, via a novel cascade polycondensation-coupling ring-opening polymerization (PROP) method. The chemical structure of (PBT-b-PEO-b-PBT)n mBCPs was revealed by 1D and 2D NMR techniques. By blending with lithium bis(trifluoromethane)sulfonamide...
A novel polycondensation-coupling ring-opening polymerization (PROP) method is utilized to synthesize poly(butylene terephthalate)-block-poly(tetramethylene oxide) alternative multiblock copolymers (PBT-b-PTMO-b-PBT)n via the one pot melt polymerization of cyclic oligo(butylene terephthalate)s (COBTs) and dihydroxy end-functional PTMO (macroinitiator). The proton peaks in 1H NMR spectra corresponding...
We report herein the effects of solvent, concentration, and molecular weight of α-alkynyl-ω-azido polystyrenes (l-PS-N3) on the synthesis of monocyclic polystyrenes (c-PS) by intra-chain coupling of l-PS-N3 via Cu-catalyzed azide/alkyne cycloaddition method. By using fully end-functionalized l-PS-N3 as precursors, the optimum cyclization conditions to synthesize high purity c-PS (>99% by SEC) are...
The integration mode and release modulation of growth factors inside the scaffolds represent major challenges for inductive tissue regeneration. The integration of the bioaffinity of heparin with growth factors and the biomimicry of electrospun fibrous network to extracellular matrices is expected to efficiently bind and gradually release growth factors. Functional ketone groups were incorporated...
In situ grown hydroxyapatite (HA) within electrospun poly(dl-lactide) (PDLLA) fibers were initially investigated as potential tissue engineering scaffolds with respect to the mechanical performances, biomineralization capability, degradation behaviors, cell growth and differentiation profiles. The tensile strength and Young’s moduli of in situ grown composites (IGC) were 8.2 ± 1.1 and 63.5 ± 5.6 MPa,...
A novel method was exploited to use electrospun poly(dl-lactide) (PDLLA) fibers grafted with chitosan as the induction sites for composite fabrication to suit better the mechanical and biological demands for biomedical applications. The amount of chitosan grafted on the fiber surface could be controlled by the aminolysis time, and the kinetic equations of HA growth were drafted as a function of the...
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