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A biotin-functionalized amphiphilic star-shaped block copolymer, POSS-(PCL-b-PDMAEMA)8-biotin, with an inorganic POSS nucleus, a hydrophobic poly(ɛ-caprolactone) (PCL) middle layer, a hydrophilic poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) outer corona was synthesized for the targeting delivery and pH-responsive release of hydrophobic pheophorbide A (PPa) photosensitizers. In aqueous solution,...
The influence of polymer chain orientation as well as multi-walled carbon nanotube (MWCNT) alignment on the creep-resistant behavior of nanocomposites has not been fully revealed yet. In this work, tensile and creep behaviors of MWCNT modified polycarbonate nanocomposite fibers produced by melt-spinning at different draw-down ratios have been studied at a temperature of 120 °C. For fibers with 2 wt...
Carbon nanotube (CNT) fibers are a novel type of fibrous materials that show potential in polymeric composite fields. In this study, we investigated the interfacial behavior of a single single-walled carbon nanotube (SWCNT) fiber embedded in isotactic polypropylene (iPP) matrix. The SWCNT fibers were found to be able to act as a heterogeneous nucleating agent which inducing the formation of transcrystals...
A series of well-defined dumbbell-shaped tri-block copolymers consisting of comb-like poly(l-lactide) (PLLA) and linear poly(ethylene glycol) (PEG) with narrow molecular weight distributions and varied PLLA arm lengths have been synthesized via the sequential preparation of terminal dendronized polyhydric PEG and ring-opening polymerization (ROP) of l-lactide (LA). The terminal dendronized polyhydric...
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