High-molecular-weight polar acrylate block copolymers as high-performance dismantlable adhesive materials in response to photoirradiation and postbaking

RSC Advances ◽  
2014 ◽  
Vol 4 (47) ◽  
pp. 24719-24728 ◽  
Author(s):  
Tadashi Inui ◽  
Eriko Sato ◽  
Akikazu Matsumoto
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
High Molecular Weight ◽  
Radical Polymerization ◽  
Failure Mode ◽  
Adhesion Strength ◽  
High Performance ◽  
Living Radical Polymerization ◽  
Controlled Synthesis ◽  
Adhesive Materials

Controlled synthesis of block copolymers as dismantlable adhesives using an organotellurium-mediated living radical polymerization (TERP) for discussion of adhesion strength and failure mode.

High Molecular Weight Block Copolymers by Sequential Monomer Addition via Cu(0)-Mediated Living Radical Polymerization (SET-LRP): An Optimized Approach

2013 ◽  
Vol 2 (10) ◽  
pp. 896-900 ◽  
Author(s):  
Athina Anastasaki ◽  
Christopher Waldron ◽  
Paul Wilson ◽  
Cyrille Boyer ◽  
Per B. Zetterlund ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
High Molecular Weight ◽  
Radical Polymerization ◽  
Living Radical Polymerization ◽  
Sequential Monomer Addition

Preparation and Characterization of the High Molecular Weight [3H]Hyaluronic Acid

1992 ◽  
Vol 57 (10) ◽  
pp. 2151-2156 ◽  
Author(s):  
Peter Chabreček ◽  
Ladislav Šoltés ◽  
Hynek Hradec ◽  
Jiří Filip ◽  
Eduard Orviský
Keyword(s):  
Molecular Weight ◽  
Hyaluronic Acid ◽  
High Molecular Weight ◽  
Methyl Bromide ◽  
High Performance ◽  
Hydrogen Atoms ◽  
Isolation And Characterization ◽  
Labelling Procedure ◽  
Enzymatic Depolymerization

Two methods for the preparation of high molecular weight [3H]hyaluronic acid were investigated. In the first one, hydrogen atoms in the molecule were replaced by tritium. This isotopic substitution was performed in aqueous solution using Pd/CaCO3 as the catalyst. In the second method, the high molecular weight hyaluronic acid was alkylated with [3H]methyl bromide in liquid ammonia at a temperature of -33.5 °C. High-performance gel permeation chromatographic separation method was used for the isolation and characterization of the high molecular weight [3H]hyaluronic acid. Molecular weight parameters for the labelled biopolymers were Mw = 128 kDa, Mw/Mn = 1.88 (first method) and Mw = 268 kDa, Mw/Mn = 1.55 (second method). The high molecular weight [3H]hyaluronic acid having Mw = 268 kDa was degraded further by specific hyaluronidase. Products of the enzymatic depolymerization were observed to be identical for both, labelled and cold biopolymer. This finding indicates that the described labelling procedure using [3H]methyl bromide does not induce any major structural rearrangements in the molecule.

Sign in / Sign up

Export Citation Format

Share Document