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Showing 1 to 17 of 17 for “"alternating copolymers"”.
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Synthesis, characterization and properties of epoxide containing block and alternating copolymers
The synthesis of epoxide containing block and alternating copolymers has been investigated in this research. Poly(ethylene oxide-2-ethyl-2-oxazoline) (PEO) copolymers have been synthesized with poly(ethylene oxide) macroinitiators ranging from O.75K-40K. Monohydroxy functionalized PEO oligomers …
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In vitro evaluation of cytotoxicity and cellular uptake of alternating copolymers for use as drug delivery vehicles
… We have developed a highly adaptable amphiphilic alternating copolymer system that self-assembles into micelles for therapeutic delivery applications in cancer. The synthetic scheme includes the enzymatic polymerization of multifunctional linker molecules (dimethyl 5-hydroxyisopthalate) with …
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Synthesis and Characterization of Nanoporous Copolymers with Potential Gas Storage Applications
… and surface areas of a series of semirigid alternating copolymers, which contained tert-butyl carboxylate-functionalized stilbene or tert-butyl carboxylate-functionalized styrene, and maleic anhydride or tert-butyl carboxylate-functionalized phenyl maleimide, were investigated using nitrogen …
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Functional Polymers Containing Semi-Rigid Alternating Sequences
Alternating copolymers represent a special class of copolymers in which the two comonomers copolymerize in a regular alternating sequence along the polymer chain. Of particular interest in our group are the stilbene-maleic anhydride/maleimide alternating copolymers. These copolymers possess …
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Poly(Phenylene vinylene) And Poly(Naphthalene vinylene) Derivatives for Use in Organic Light-Emitting Diodes (OLEDs)
… poly(naphthalene vinylene) (PNV) in the form of alternating copolymers showed improved OLED device performance over PNV homopolymers. The improved solubility of these copolymers allowed for the analysis of the effect of alky and alkoxy substitutents in PNV derivatives on electroluminescent …
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Synthesis of reactive and stimuli-responsive polymer thin films by initiated chemical vapor deposition and their sensor applications
… have been studied. First, functionally versatile alternating copolymers of poly(styrene-alt-maleic anhydride) were synthesized. This was the first demonstration of alternating copolymer synthesis by CVD. Fourier transform infrared spectroscopy, x-ray photoelectron spectroscopy, and 13C NMR …
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Synthesis and characterization of rigid nanoporous hypercrosslinked copolymers for high surface area materials with potential hydrogen storage capabilities
… maleimide and functionalized stilbene alternating copolymers into a "hypercrosslinked system" to achieve high rigidity, high surface areas, high aromatic content and good thermal stability. Hypercrosslinked copolymers of N-(3-methylphenyl)maleimide (3MPMI), 4-methyl stilbene (4MSTBB), …
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Development of novel polymeric nanoparticles with tailored architectures and functionalities/
… (PLA)-MM was used to create pseudo-alternating copolymers and miktoarm-BASPs. Transmission electron miscroscopy (TEM) of these star polymers revealed nanoparticles with segregated domains. Also, new cross-linkers were explored containing two different bis-norbornene reversible …
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Synthesis and Characterization of Highly Functional Substituted Stilbene Copolymers and Semi-crystalline Poly(aryl ether sulfone)s
Novel, highly functional rod-like copolymers have been synthesized by alternating copolymerization of N, N, Nâ , Nâ -tetraalkyl-4, 4â -diaminostilbenes (TDAS) with maleic anhydride. Dynamic light scattering, 2H solid state NMR and persistence length measurement reveal high chain rigidity of the …
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Manipulating Conjugation in electronic polymers and graphitic materials: chemosensors, precursor routes, and self-assembly
… synthesize dithienobenzotropone-based conjugated alternating copolymers by direct arylation polycondensation. Post-polymerization hydride reduction furnishes cross-conjugated copolymeric hydrogels that undergo phosphorylation and subsequent ionization upon exposure to chemical warfare agent (CWA) …
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Synthesis and Characterization of Well-Defined Poly(1,3-Cyclohexadiene) Homopolymers and Copolymers
… degradation occurred at 110° C. Perfectly alternating copolymers of poly(1,3-cyclohexadiene-alt-styrene) were synthesized, and the reactivity ratios for these copolymers (r1,3CHD = 0.022, rstyrene = 0.024) were determined using a conventional Mayo-Lewis approach. The effect of aromatization …
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Synthesis and Solution Properties of Semi-rigid Polyelectrolytes and Polyampholytes
The incorporation of substituted stilbenes in copolymers affects the resulting solution properties and their controlled radical polymerizations. Substituted stilbene monomers readily polymerize in an alternating fashion with acceptor comonomers such as maleic anhydride and maleimide. These …
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Synthesis and self-assembly of multiple thermoresponsive amphiphilic block copolymers
… self-assembly of multi thermoresponsive block copolymers in dilute aqueous solution was investigated by a combination of turbidimetry, dynamic light scattering, TEM measurements, NMR as well as fluorescence spectroscopy. The successive conversion of such block copolymers from a hydrophilic into …
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Synthesis and Characterization of Siloles, Silole-Containing Polymers and Photoswitchable Polymer Brush
… accepting benzodiazole scaffolds to give alternating copolymers with low energy band gaps. However, the molecular weights were not optimal, and therefore future work is needed to optimize the reaction conditions in order to obtain higher molecular weight polymers. In the second part of …
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Sterically Crowded Copolymers Based on Functionalized Stilbenes
… of the donor-acceptor comonomer pairs and the alternating copolymerization of these comonomers lead to precise control over charge density and placement of charged groups along the polymer backbone. Analogous styrenic copolymers, for direct comparison to the stilbene structures, were also …
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Morphological Characterization and Analysis of Ion-Containing Polymers Using Small Angle X-ray Scattering
… persistence lengths for stilbene and styrenic alternating copolymers range from 2 to 6 nm, which characterizes these copolymers into a class of semi-rigid polymers. This study allows to elucidate the steric crowding effect on the chain stiffness of these polymers, which provides fundamental …
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Development of alternating amphiphilic copolymers for targeted delivery applications in cancer
… adaptable, targeted nanoparticle system based on alternating amphiphilic copolymers has been developed having a variety of potential clinical applications. These polymers consist of an alternating copolymer backbone composed of hydrophilic polyethylene glycol-900 (PEG900) and dimethyl …