Synthesis of multisegmented block copolymer by Friedel–Crafts hydroxyalkylation polymerization

2020 ◽  
Vol 11 (14) ◽  
pp. 2542-2549
Author(s):  
Timothy Cuneo ◽  
Xiaosong Cao ◽  
Lei Zou ◽  
Haifeng Gao
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Molar Mass ◽  
High Molar Mass

Friedel–Crafts (FC) polycondensation of 1,4-dimethoxybenzene with 4-substituted benzaldehyde species was used to prepare telechelic oligomers and high-molar-mass multisegmented block copolymers.

Fluorometric and Ultraviolet−Visible Absorption Study of Poly(methacrylic acid) Shells of High-Molar-Mass Block Copolymer Micelles†

Langmuir ◽  
1999 ◽  
Vol 15 (12) ◽  
pp. 4185-4193 ◽  
Author(s):  
Miroslav Štěpánek ◽  
Klára Podhájecká ◽  
Karel Procházka ◽  
Yue Teng ◽  
Stephen E. Webber
Keyword(s):  
Block Copolymer ◽  
Methacrylic Acid ◽  
Molar Mass ◽  
Absorption Study ◽  
Visible Absorption ◽  
High Molar Mass ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles

scholarly journals Bromoform-assisted aqueous free radical polymerisation: a simple, inexpensive route for the preparation of block copolymers

2021 ◽  
Author(s):  
Helena Jayne Hutchins-Crawford ◽  
Matthew J Derry ◽  
Padarat Ninjiaranai ◽  
Robert Molloy ◽  
Brian Tighe ◽  
...  
Keyword(s):  
Free Radical ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Mass Distribution ◽  
Molar Mass ◽  
Molecular Composition ◽  
Molar Mass Distribution ◽  
Radical Polymerisation

In the quest for commercially relevant block copolymer additives, for which overall average molecular composition is key but molar mass distribution is of little importance, we present a straightforward, sulfur-...

scholarly journals Ordered mesoporous titania from highly amphiphilic block copolymers: tuned solution conditions enable highly ordered morphologies and ultra-large mesopores

2015 ◽  
Vol 3 (21) ◽  
pp. 11478-11492 ◽  
Author(s):  
Morgan Stefik ◽  
Juho Song ◽  
Hiroaki Sai ◽  
Stefan Guldin ◽  
Patrick Boldrighini ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Molar Mass ◽  
Amphiphilic Block Copolymers ◽  
Mesoporous Titania ◽  
High Molar Mass ◽  
Ordered Mesoporous ◽  
Titania Nanostructures ◽  
Large Mesopores ◽  
Triblock Terpolymers

Solubility guidelines enable the use of high molar mass block copolymers and ABC triblock terpolymers for the coassembly of titania nanostructures.

Precipitation fractionation of block copolymers

1985 ◽  
Vol 50 (11) ◽  
pp. 2588-2597 ◽  
Author(s):  
Zdeněk Tuzar ◽  
Antonín Sikora ◽  
Dagmar Straková ◽  
Jiří Podešva ◽  
Jaroslav Stejskal ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Molar Mass ◽  
Chemical Heterogeneity ◽  
Preparative Separation ◽  
The Real

Possibilities offered by classical precipitation fractionation in the preparative separation of polymer admixtures from block copolymers and in an estimate of the polydispersity in molar mass and of the heterogeneity in chemical composition of block copolymers have been examined. A mixture of a two-block copolymer, polystyrene-block-polyisoprene, with polystyrene was separated in the systems cyclohexane/1-propanol and 1,4-dioxan/1-propanol, and a mixture of three two-block styrene-isoprene copolymers having different chemical composition was fractionated in the system benzene/methanol. In the cyclohexane/1-propanol system, two commercial samples of three-block copolymers polystyrene-block-poly(ethene-co-butene)-block-polystyrene and their mixture were fractionated. The results showed that the polydispersity and chemical heterogeneity thus estimated are much lower than the real ones, especially due to the colloid properties of block copolymers.

Well-Ordered Polymer Melts with 5 nm Lamellar Domains from Blends of a Disordered Block Copolymer and a Selectively Associating Homopolymer of Low or High Molar Mass

2008 ◽  
Vol 41 (21) ◽  
pp. 7978-7985 ◽  
Author(s):  
Vijay R. Tirumala ◽  
Vikram Daga ◽  
August W. Bosse ◽  
Alvin Romang ◽  
Jan Ilavsky ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Molar Mass ◽  
Polymer Melts ◽  
High Molar Mass

Paper Chemistry: Interactions of thermo mechanical pulp fractions with high molar mass cationic polyacrylamides: Part 2. Flocculation

2010 ◽  
Vol 25 (3) ◽  
pp. 310-318 ◽  
Author(s):  
Tero Taipale ◽  
Janne Laine ◽  
Susanna Holappa ◽  
Jonni Ahlgren ◽  
Juan Cecchini
Keyword(s):  
Molar Mass ◽  
High Molar Mass ◽  
Mechanical Pulp ◽  
Paper Chemistry

scholarly journals Highly Efficient MOF Catalyst Systems for CO2 Conversion to Bis-Cyclic Carbonates as Building Blocks for NIPHUs (Non-Isocyanate Polyhydroxyurethanes) Synthesis

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 628
Author(s):  
Adolfo Benedito ◽  
Eider Acarreta ◽  
Enrique Giménez
Keyword(s):  
Molar Mass ◽  
Cycloaddition Reaction ◽  
Building Blocks ◽  
Catalyst System ◽  
Cyclic Carbonate ◽  
Ammonium Bromide ◽  
Cyclic Carbonates ◽  
High Molar Mass ◽  
Highly Efficient ◽  
Free Process

The present paper describes a greener sustainable route toward the synthesis of NIPHUs. We report a highly efficient solvent-free process to produce [4,4′-bi(1,3-dioxolane)]-2,2′-dione (BDC), involving CO2, as renewable feedstock, and bis-epoxide (1,3-butadiendiepoxide) using only metal–organic frameworks (MOFs) as catalysts and cetyltrimethyl-ammonium bromide (CTAB) as a co-catalyst. This synthetic procedure is evaluated in the context of reducing global emissions of waste CO2 and converting CO2 into useful chemical feedstocks. The reaction was carried out in a pressurized reactor at pressures of 30 bars and controlled temperatures of around 120–130 °C. This study examines how reaction parameters such as catalyst used, temperature, or reaction time can influence the molar mass, yield, or reactivity of BDC. High BDC reactivity is essential for producing high molar mass linear non-isocyanate polyhydroxyurethane (NIPHU) via melt-phase polyaddition with aliphatic diamines. The optimized Al-OH-fumarate catalyst system described in this paper exhibited a 78% GC-MS conversion for the desired cyclic carbonates, in the absence of a solvent and a 50 wt % chemically fixed CO2. The cycloaddition reaction could also be carried out in the absence of CTAB, although lower cyclic carbonate yields were observed.

scholarly journals High Molar Mass Polycarbonate via Dynamic Solution Transcarbonation Using Bis(methyl salicyl) Carbonate, an Activated Carbonate

2021 ◽  
pp. 2100186
Author(s):  
Annelore Aerts ◽  
Camiel Kroonen ◽  
Jan Henk Kamps ◽  
Rint P. Sijbesma ◽  
Johan P. A. Heuts
Keyword(s):  
Molar Mass ◽  
High Molar Mass ◽  
Dynamic Solution

Synthesis of high molar mass poly(12-hydroxydodecanoic acid) in brønsted acid ionic liquids

Polymer ◽  
2010 ◽  
Vol 51 (6) ◽  
pp. 1218-1221 ◽  
Author(s):  
Elise-Marie Dukuzeyezu ◽  
Hervé Lefebvre ◽  
Martine Tessier ◽  
Alain Fradet
Keyword(s):  
Ionic Liquids ◽  
Molar Mass ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
High Molar Mass ◽  
Brönsted Acid
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