Browsing by Subject "Molecular weight"
Now showing items 1-20 of 37
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Article
Amphiphilic diblock and ABC triblock methacrylate copolymers: Synthesis and aqueous solution characterization
(2002)Three isomeric, linear, equimolar, amphiphilic ABC triblock copolymers comprising methyl methacrylate (MMA, nonionic hydrophobic), 2-(dimethylamino)ethyl methacrylate, (DMAEMA, ionizable hydrophilic) and hexa(ethylene ...
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Amphiphilic Polymer Conetworks Based on Interconnected Hydrophobic Star Block Copolymers: Synthesis and Characterization
(2017)Herein we report on the preparation and structural characterization of six amphiphilic polymer conetworks (APCN) based on end-linked amphiphilic “core-first” star block copolymers, comprising methyl methacrylate and ...
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Article
Dynamic responses in nanocomposite hydrogels
(2006)The shear response of a series of polymer-clay gels has been investigated by means of rheology and small-angle neutron scattering (SANS). The gels have the same composition by mass but different polymer molecular weights ...
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Article
Effect of maleic anhydride-divinyl ether copolymers on experimental M109 metastases and macrophage tumoricidal function
(1978)Pyran copolymer (NSC-46015) was compared with five maleic anhydride-divinyl ether copolymers (MVEs) of narrow molecular weight range both for the ability to render macrophages nonspecifically tumoricidal and to retard the ...
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Conference Object
Effect of molecular weight on the vibronic structure of a diketopyrrolopyrrole polymer
(SPIE, 2016)Resonance Raman Spectroscopy (RRS) is employed in this study to examine the influence of molecular weight on the optical response of a diketopyrrolopyrrole polymer (DPP-TT-T) in solution. The vibronic structure observed ...
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Equation of state for star polymers in good solvents
(2000)A free-energy model for star polymers was developed in good solvents that accurately describes concentrated polymer solutions and displays the correct universal scaling behaviour, in the limit of infinite molecular weight, ...
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Article
Near-monodisperse α-hydroxy and α,ω-dihydroxy amine-based polymers: Synthesis and characterization
(1999)α-Hydroxy and α,ω-dihydroxy polymers of 2-(dimethylamino)ethyl methacrylate (DMAEMA) of various molecular weights were synthesized by group transfer polymerization (GTP) in tetrahydrofuran (THF), using 1-methoxy-1-(trime ...
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Article
Networks Based on “Core-First” Star Polymers End-Linked Using a Degradable Ketal Cross-Linker: Synthesis, Characterization, and Cleavage
(2018)Sequential group transfer polymerization of cross-linker, monomer (methyl methacrylate), and cross-linker again is used to prepare cleavable polymer networks based on interconnected “core-first” star polymers. By employing ...
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Article
Recent advances in the treatment of HIV/HBV and HIV/HCV co-infection
(2012)Concurrent infection with hepatitis B virus (HBV) and hepatitis C virus (HCV) in patients positive for human immunodeficiency virus (HIV) is relatively common. The treatment of co-infected individuals is rather complex ...
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Article
Shear-induced nanometer and micrometer structural responses in nanocomposite hydrogels
(2010)The structural responses of a polymer-clay nanocomposite hydrogel to an imposed shear field are investigated from the nanometer to the micrometer length scales. The effects of polymer molecular weight and concentration of ...
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Article
Star polymers and polymer networks containing a novel, hydrolyzable diacetal-based dimethacrylate cross-linker: Synthesis, characterization, and hydrolysis kinetics
(2007)A hydrolyzable diacetal dimethacrylate cross-linker, MOEME, was retrieved from the same product mixture where its monoacetal homologue, DMOEM, was synthesized. MOEME was copolymerized with MMA by GTP after purification, ...
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Article
Styrene-vinyl pyridine diblock copolymers: Achieving high molecular weights by the combination of anionic and reversible addition-fragmentation chain transfer polymerizations
(2013)Anionic and reversible addition-fragmentation chain transfer (RAFT) polymerizations were combined for the preparation of high molecular weight (MW) amphiphilic diblock copolymers based on the hydrophobic styrene (Sty) and ...
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Article
Styrene-vinyl pyridine diblock copolymers: Synthesis by RAFT polymerization and self-assembly in solution and in the bulk
(2012)Reversible addition-fragmentation chain transfer (RAFT) polymerization along with benzyl dithiobenzoate chain transfer agent was employed for the controlled preparation of four diblock copolymers of styrene (St, less polar ...
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Article
Symmetrical polymer systems prepared using a degradable bifunctional atom transfer radical polymerization initiator: Synthesis, characterization, and cleavage
(2017)Linear (co)polymers and dimethacrylate-end-linked polymer networks of methyl methacrylate with 2-(dimethylamino)ethyl methacrylate, cleavable in the middle of the polymer chain, either under thermolysis or alkaline hydrolysis ...
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Article
Synthesis and aqueous solution characterization of amphiphilic diblock copolymers containing carbazole
(2002)A series of near-monodisperse diblock copolymers of 2-(N-carbazolyl)ethyl methacrylate and 2-(dimethylamino)ethyl methacrylate (DMAEMA) of relatively low molecular weights (2600-24,000 g mol-1) were synthesized by group ...
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Article
Synthesis and aqueous solution characterization of amphiphilic diblock copolymers containing carbazole
(2002)A series of near-monodisperse diblock copolymers of 2-(N-carbazolyl)ethyl methacrylate and 2-(dimethylamino)ethyl methacrylate (DMAEMA) of relatively low molecular weights (2600-24,000 g mol-1) were synthesized by group ...
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Article
Synthesis and aqueous solution characterization of novel diblock polyampholytes containing imidazole
(2002)A series of diblock copolymers of 2-(1-imidazolyl)ethyl methacrylate and tetrahydropyranyl methacrylate (THPMA) were synthesized by group transfer polymerization using propylene carbonate rather than tetrahydrofuran as the ...
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Article
Synthesis and aqueous solution properties of amphiphilic diblock copolymers based on methyl triethylene glycol vinyl ether and benzyl vinyl ether
(1997)Water-soluble diblock copolymers of methyl triethylene glycol vinyl ether and benzyl vinyl ether were synthesized by living cationic polymerization, giving molecular weights in the range 13 400-17 300 and narrow molecular ...
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Article
Synthesis and characterization of amphiphilic conetworks based on multiblock copolymers
(2007)Model amphiphilic conetworks based on cross-linked block copolymers of the hydrophilic ionizable 2-(dimethylamino)ethyl methacrylate (DMAEMA, 25 nominal units per block) and the hydrophobic n-butyl methacrylate (BuMA, 5 ...