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Perylene bisimides (PBIs) possess high fluorescence quantum yields, high extinction coefficients, and high chemical and photophysical stability. However, their poor water-solubility limits their potential biomedical applications. In this work, we show a facile one-step condensation method to synthesize PBI-incorporated polyurethanes (HDI-PBI-PEG) from hexamethylene diisocyanate (HDI), PBI, and poly(ethylene...
In this paper, we demonstrated the successful fabrication of crosslinked porous films with varying monomer-crosslinker ratios, by photo-induced crosslinking during the breath figure formation. For all the samples fabricated, the pores at the peripheral regions appeared more uniform in size and showed higher degree of ordering, due to the interplay between the solvent evaporation and crosslinking reaction...
This work demonstrates a new strategy of producing honeycomb-like porous structures in cross-linked polymer films via a simple one-step synthesis/fabrication process. This is based on the “breath figure” formation during the in situ cross-linking of reactive monomer solutions. A chloroform solution, containing tert-butyl acrylate monomer and tetraethylene glycol dimethacrylate cross-linker, was cross-linked...
Reduced graphene oxide (RGO)-polymer composites were prepared via π–π stacking interactions of RGO with the perylene bisimide-containing poly(glyceryl acrylate) (PBIPGA). PBIPGA was synthesized via atom transfer radical polymerization (ATRP) of solketal acrylate (SA), using bifunctional N,N′-bis{2-[2-[(2-bromo-2-methylpropanoyl)oxy]ethoxy]ethyl}perylene-3,4,9,10-tetracarboxylic acid bisimide (PBI-Br)...
A copolyester was characterized to have 91mol% trimethylene terephthalate unit and 9mol% ethylene terephthalate unit in a random sequence by using 13 C NMR. Differential scanning calorimeter (DSC) was used to investigate the isothermal crystallization kinetics in the temperature range (T c ) from 180 to 207°C. The melting behavior after isothermal crystallization was studied by using...
A class of polyesters have been synthesized by the ring-opening copolymerization of dl-lactide (DLLA) and RS-benzyloxyethyl-β-malolactonate (MABE) using different monomer feeding doses. The compositions and structures of poly(dl-lactide-co-RS-benzyloxyethyl-β-malolactonate) (poly(DLLA-co-MABE)) were determined by 1 H and 13 C NMR measurements. GPC measurement showed that the molecular...
Both well defined star-shaped poly(ε-caprolactone) having four arms (4sPCL) and six arms (6sPCL) and linear PCL having one arm (LPCL) and two arms (2LPCL) were synthesized and then used for the investigation of physical properties, isothermal and nonisothermal crystallization kinetics, and spherulitic growth. The maximal melting point, the cold crystallization temperature, and the degree of crystallinity...
A series of new polyamides was synthesized by direct polycondensation of the 4,9-bis[4-(4-aminophenoxy)phenyl]diamantane (I) with various dicarboxylic acids. The polyamides had high inherent viscosities and number-average molecular weights (M n ) of 0.65-1.65 dl g -1 and 32 000- 140 000, respectively. Although the symmetrical and rigid 4,9-diphenyldiamantane units were incorporated...
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