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Novel graft copolymers, PTPA-g-PEAs containing poly(triphenylamine) (PTPA) backbone and poly(ethyl acrylate) (PEA) branches were synthesized by the oxidative coupling polymerization of triarylamine monomers followed by grafting of ethyl acrylate via an atom transfer radical polymerization (ATRP). Photorefractive (PR) composites based on the graft copolymers showed good static PR properties and fast...
A series of new acceptor-pended conjugated polymers P27CZSDCN, P27CZSDTA, P36CZSDCN and P36CZSDTA, which are composed of carbazole and triphenylamine alternatingly arranged main chain, electron-withdrawing pendant groups (malononitrile and 1,3-diethyl-2-thiobarbituric acid) and thiophene π-bridge, are designed and synthesized. Both 2,7-carbazole and 3,6-carbazole are used as the building blocks to...
We have shown that the addition of resorcinol di(phenyl phosphate) (RDP)-coated starch can improve the compatibility to either Ecoflex or poly(lactic acid) (PLA). The increased compatibilization enhanced the tensile properties such as yield strength and impact toughness. In particular, we examined the effect of addition of RDP-coated starch on thermal responses of a blend of Ecoflex/PLA. We found...
Polymeric nanocomposites of high thermal conductivities are developed for their significant potential applications in modern electronics, transportation, and space technologies. Among widely studied nanoscale fillers are carbon nanomaterials of superior thermal transport characteristics, whose incorporation into polymeric matrices may result in nanocomposites that exhibit a good combination of processability...
A facile “one-pot” emulsion polymerization is reported to prepare surface-functionalized sub-micron spheres using novel amphiphilic comonomer as the reactive emulsifier. Specifically, amphiphilic 3-[2-(acryloyloxy)ethoxy]-3-oxopropyl(phenyl) phosphinic sodium (AEOPS) was used not only as a comonomer, but also as a good emulsifier for the polymerization due to the relatively long chain of amphiphilic...
Green light-emitting polyfluorenes were synthesized by Suzuki polycondensation via introducing dibenzothiophene-S,S-dioxide-(di-)tri-phenylamine (G 1 and G 2 ) moieties and dibenzothiophene-S,S-dioxide (SO) unit into the polyfluorene backbone, respectively. PF–SO–G copolymers show a high thermal stability and a moderate photoluminescence quantum yield in the range of 20–40%. The lowest...
We synthesized a series of four dinuclear constrained geometry catalysts (DCGCs) containing alkyl-substituted para-xylene bridges [TiCl 2 {N( t Bu)Si(Me) 2 }C 9 H 5 ] 2 [(CH 2 ){(R) 2 C 6 H 2 }(CH 2 )]: 13 (R = hydrogen), 14 (R = isopropyl), 15 (R = n-hexyl), and 16 (R = n-octyl). The structures and compositions...
A series of 2-[1-(2,6-dibenzhydryl-4-chlorophenylimino)ethyl]-6-[1-(arylimino)ethyl]pyridine ligands (L1–L5) as well as the ligand 2,6-bis[1-(2,6-dibenzhydryl-4-chloro-phenylimino)ethyl]pyridine (L6) were synthesized and reacted with FeCl 2 ·4H 2 O to afford the iron(II) dichloride complexes [LFeCl 2 ] (Fe1–Fe6). All new compounds were fully characterized by elemental and spectroscopic...
Two novel conjugated alternating copolymers with [1,2,5]thiadiazolo[3,4-f]benzotriazole as acceptor and 9,9-dioctylfluorene or N-9’-heptadecanyl-carbazole as donors respectively, were synthesized by Suzuki polycondensation. Both of the two copolymers have nearly ideal band gaps and show excellent absorption spectra in near infrared region. Polymer solar cells based on the blends of them and [6,6]-phenyl-C...
With the aim of multifunctionalized all-optical photorefractive polymers bearing a non-conjugated main chain (NCMC), four novel norbornene-containing monomers were synthesized by introduction of different alkyl spacers between the functional chromophore and norbornene group. The polymers were prepared via ring-opening metathesis polymerization (ROMP) and characterized by IR, UV–Vis, GPC, DSC, TG,...
A series of novel side-chain cholesteric liquid-crystalline elastomers based on polysiloxane and cholesterol derivate monomer were prepared by adopting a crosslinking agent containing binaphthalene group. The chemical structures and mesomorphic properties of the monomers and elastomers were confirmed by FT-IR, 1 H NMR, DSC and POM measurements. Worthily, the elastomers exhibited unusual temperature...
In the present work, a simple and effective approach has been employed to fabricate the polystyrene/polyaniline (PS/PANI) composite microspheres with various morphologies. PS/PANI composite microspheres exhibiting different structures such as sea-urchin like, core-shell structure, have been synthesized by seeded emulsion polymerization with polystyrene microspheres as seeds. In particular, the sea...
Despite the great potential of graphene as the nanofiller, to achieve homogeneous dispersion remains the key challenge for effectively reinforcing the polymer. Here, we report an eco-friendly strategy for fabricating the polymer nanocomposites with well-dispersed graphene sheets in the polymer matrix via first coating graphene using polypropylene (PP) latex and then melt-blending the coated graphene...
We report on the self-assembly, in water and in bulk, of amphiphilic liquid crystal block copolymers consisting of a cholesterol-based smectic LC polymer block (PAChol) and poly(ethylene glycol) (PEG) block. Two series of block copolymers, PEG 45 -b-PAChol and PEG 114 -b-PAChol (45 and 114 are the degree of polymerization of PEG blocks) with different hydrophilic/hydrophobic weight...
Generally polymer bulk structures and nanostructures are thermally insulative. In this study, we show that an improved nanoporous template wetting technique can prepare thermally conductive polymer nanowire arrays. The thermal conductivities of the fabricated high-density polyethylene (HDPE) nanowire arrays with diameters of 100 nm and 200 nm, measured by a laser flash method, are about 2 orders of...
A low molecular weight (MW) poly(ethylene oxide) (PEO) crystallized in ultrathin films displays various crystal growth patterns in a crystallization temperature (T x ) range from 20.0 °C to 50.0 °C. In succession, the following patterns are found: nearly one-dimensional (1D) dendrite-like crystal patterns at T x ≤ 38.0 °C, two-dimensional (2D) seaweed-like patterns between 39.0 °C ≤ T...
Novel amphiphilic chitosan-g-poly(ε-caprolactone)-(g-poly(2-(2-methoxyethoxy)ethyl methacrylate)-co-oligo(ethylene glycol) methacrylate) (CS-g-PCL(-g-P(MEO 2 MA-co-OEGMA))) copolymers with double side chains of PCL and P(MEO 2 MA-co-OEGMA) were synthesized via combination of ring-opening polymerization (ROP), atom transfer radical polymerization (ATRP) and click chemistry. The molar...
A novel fluorescent conjugated polyelectrolyte with pendant glucosamine hydrochloride clusters was prepared through Cu(I)-catalyzed azide/alkyne “click” ligation and Suzuki coupling polymerization. Compared with monosugar-functionalized conjugated polymer, the water-solubility and fluorescence quantum yield of the glycocluster-containing polymer (P-3) were significantly improved. As a glucosamine-containing...
A methodology is described for the preparation of thermosensitive organic–inorganic hybrid microgels with functional Fe 3 O 4 nanoparticles as the crosslinker and N-isopropylacrylamide (NIPAm) as the monomer. Magnetic Fe 3 O 4 nanoparticles were first prepared via a redox reaction in aqueous solution and then modified with 3-(trimethoxysilyl)propylmethacrylate (TMSPMA)...
In this study, we demonstrate a novel method for fabricating a single layer cholesteric liquid crystal (CLC) film with non-uniform pitch distribution by utilizing the chiral polynetworks. A chiral monomer, the helical twist power (HTP) of which decreases with the increase of temperature, was synthesized. The temperature dependence of the pitch of the mixtures before and after polymerization was investigated...
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