Characterization of New Amphiphilic Block Copolymers of N -Vinyl Pyrrolidone and Vinyl Acetate, 1 - Analysis of Copolymer Composition, End Groups, Molar Masses and Molar Mass Distributions

2010 ◽  
Vol 211 (8) ◽  
pp. 869-878 ◽  
Author(s):  
Nick Fandrich ◽  
Jana Falkenhagen ◽  
Steffen M. Weidner ◽  
Dietmar Pfeifer ◽  
Bastiaan Staal ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Vinyl Acetate ◽  
Molar Mass ◽  
Amphiphilic Block Copolymers ◽  
Vinyl Pyrrolidone ◽  
Copolymer Composition ◽  
Mass Distributions ◽  
End Groups

Characterization of New Amphiphilic Block Copolymers of N-Vinylpyrrolidone and Vinyl Acetate, 2 - Chromatographic Separation and Analysis by MALDI-TOF and FT-IR Coupling

2010 ◽  
Vol 211 (15) ◽  
pp. 1678-1688 ◽  
Author(s):  
Nick Fandrich ◽  
Jana Falkenhagen ◽  
Steffen M. Weidner ◽  
Bastiaan Staal ◽  
Andreas F. Thünemann ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Vinyl Acetate ◽  
Chromatographic Separation ◽  
Amphiphilic Block Copolymers ◽  
Maldi Tof ◽  
Ft Ir

scholarly journals Controlled ATRP Synthesis of Novel Linear-Dendritic Block Copolymers and Their Directed Self-Assembly in Breath Figure Arrays

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 539 ◽  
Author(s):  
Xin Liu ◽  
Tina Monzavi ◽  
Ivan Gitsov
Keyword(s):  
Block Copolymers ◽  
Pore Size ◽  
Molecular Mass ◽  
Self Assembly ◽  
Palladium Complexes ◽  
Copolymer Composition ◽  
Average Molecular Mass ◽  
Mass Distributions ◽  
Breath Figure ◽  
End Groups

Herein, we report the formation and characterization of novel amphiphilic linear-dendritic block copolymers (LDBCs) composed of hydrophilic dendritic poly(ether-ester), PEE, blocks and hydrophobic linear poly(styrene), PSt. The LDBCs are synthesized via controlled atom transfer radical polymerization (ATRP) initiated by a PEE macroinitiator. The copolymers formed have narrow molecular mass distributions and are designated as LGn-PSt Mn, in which LG represents the PEE fragment, n denotes the generation of the dendron (n = 1–3), and Mn refers to the average molecular mass of the LDBC (Mn = 3.5–68 kDa). The obtained LDBCs are utilized to fabricate honeycomb films by a static “breath figure” (BF) technique. The copolymer composition strongly affects the film morphology. LDBCs bearing acetonide dendron end groups produce honeycomb films when the PEE fraction is lower than 20%. Pore uniformity increases as the PEE content decreases. For LDBCs with hydroxyl end groups, only the first generation LDBCs yield BF films, but with a significantly smaller pore size (0.23 μm vs. 1–2 μm, respectively). Although higher generation LDBCs with free hydroxyl end groups fail to generate honeycomb films by themselves, the use of a cosolvent or addition of homo PSt leads to BF films with a controllable pore size (3.7–0.42 μm), depending on the LDBC content. Palladium complexes within the two triazole groups in each of the dendron’s branching moieties can also fine-tune the morphology of the BF films.

Molecular weight and contraction factors of hyperbranched poly(urea-urethane)s

e-Polymers ◽  
2006 ◽  
Vol 6 (1) ◽  
Author(s):  
Albena Lederer ◽  
Mona Abd Elrehim ◽  
Falko Schallausky ◽  
Dieter Voigt ◽  
Brigitte Voit
Keyword(s):  
Chemical Structure ◽  
Molar Mass ◽  
Molecular Shape ◽  
Branched Polymers ◽  
Compact Structure ◽  
H Nmr ◽  
Hyperbranched Poly ◽  
End Groups ◽  
Solution Behaviour

AbstractElution fractionations of broadly molar mass-distributed, hyperbranched poly(urea-urethane)s with OH- and Ph- end groups were carried out to obtain a number of macromolecular samples possessing different molar masses at the same chemical structure. The characterization of the polymers was performed by SEC, MALLS, 1H-NMR, MALDI-TOF-MS and viscosity measurements. Modifications of the OH-end groups of the polymers were carried out. We observed a strong influence of the end groups on the solution behaviour of the hyperbranched samples. The molecular shape of the hyperbranched polymers in solution was compared to their linear analogue using the Kuhn-Mark-Houwink- Sakurada relationship. The calculated contraction factors between 0,15 and 0,7 depending on the molar masses correspond to a very compact structure of the modified branched polymers at high molar masses.

scholarly journals Synthesis and surface characterization of well-defined amphiphilic block copolymers composed of polydimethylsiloxane and poly[oligo(ethylene glycol) methacrylate]

RSC Advances ◽  
2017 ◽  
Vol 7 (41) ◽  
pp. 25199-25207 ◽  
Author(s):  
Raita Goseki ◽  
Ling Hong ◽  
Manabu Inutsuka ◽  
Hideaki Yokoyama ◽  
Kohzo Ito ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ethylene Glycol ◽  
Methyl Ether ◽  
Surface Characterization ◽  
Diblock Copolymers ◽  
Amphiphilic Block Copolymers ◽  
Glycol Methacrylate ◽  
Glycol Methyl Ether

A series of amphiphilic polydimethylsiloxane-b-poly[tri(ethylene glycol) methyl ether methacrylate] (PDMS-b-PM3) diblock copolymers were prepared with varying PM3 compositions.

scholarly journals Amphiphilic block copolymers from a renewable ε-decalactone monomer: prediction and characterization of micellar core effects on drug encapsulation and release

2016 ◽  
Vol 4 (44) ◽  
pp. 7119-7129 ◽  
Author(s):  
Deepak Kakde ◽  
Vincenzo Taresco ◽  
Kuldeep K. Bansal ◽  
E. Peter Magennis ◽  
Steven M. Howdle ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Amphiphilic Block Copolymers ◽  
Drug Encapsulation ◽  
Micellar Core

Block co-polymers with a block derived from a sustainable monomer source are used to encapsulate and release the drug indomethacin.

scholarly journals Cellulose propionate/poly(N-vinyl pyrrolidone-co-vinyl acetate) blends: dependence of the miscibility on propionyl DS and copolymer composition

Cellulose ◽  
2013 ◽  
Vol 20 (1) ◽  
pp. 239-252 ◽  
Author(s):  
Kazuki Sugimura ◽  
Shougo Katano ◽  
Yoshikuni Teramoto ◽  
Yoshiyuki Nishio
Keyword(s):  
Vinyl Acetate ◽  
Vinyl Pyrrolidone ◽  
Copolymer Composition ◽  
Cellulose Propionate
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