scholarly journals Photo-reactive nanogels as a means to tune properties during polymer network formation

2014 ◽  
Vol 5 (1) ◽  
pp. 227-233 ◽  
Author(s):  
JianCheng Liu ◽  
Ima Y. Rad ◽  
Fang Sun ◽  
Jeffrey W. Stansbury
Keyword(s):  
Network Formation ◽  
Polymer Network

scholarly journals Impact of adhesive and photoactivation method on sealant integrity and polymer network formation

2012 ◽  
Vol 26 (3) ◽  
pp. 249-255
Author(s):  
Boniek Castillo Dutra Borges ◽  
Fabrício Lopes da Rocha Pereira ◽  
Roberta Caroline Bruschi Alonso ◽  
Rodivan Braz ◽  
Marcos Antônio Japiassú Resende Montes ◽  
...  
Keyword(s):  
Network Formation ◽  
Polymer Network

scholarly journals Coupling the Microscopic Healing Behaviour of Coatings to the Thermoreversible Diels-Alder Network Formation

Coatings ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 13 ◽  
Author(s):  
Joost Brancart ◽  
Robrecht Verhelle ◽  
Jessica Mangialetto ◽  
Guy Van Assche
Keyword(s):  
Network Formation ◽  
Polymer Network ◽  
Cycloaddition Reaction ◽  
Thermomechanical Properties ◽  
Alder Reaction ◽  
Diels Alder ◽  
Force Microscopy ◽  
Diels Alder Reaction ◽  
Atomic Force ◽  
Microscopic Evaluation

While thermally reversible polymer network coatings based on the Diels-Alder reaction are widely studied, the mechanisms responsible for the heating-mediated healing of damage is still not well understood. The combination of microscopic evaluation techniques and fundamental insights for the thermoreversible network formation in the bulk and coating shed light on the mechanisms behind the damage healing events. The thermomechanical properties of thermoset and elastomer coatings, crosslinked by the furan-maleimide Diels-Alder cycloaddition reaction, were studied in bulk and compared to the thermal behaviour applied as coatings onto aluminium substrates. The damage sealing of thermoset (Tg = 79 °C) and elastomer (Tg = −49 °C) coatings were studied using nano-lithography and atomic force microscopy (AFM). The sealing event is studied and modelled at multiple temperatures and correlated to the changes in the network structure and corresponding thermomechanical properties.

scholarly journals Polymer gel with a flexible and highly ordered three-dimensional network synthesized via bond percolation

2019 ◽  
Vol 5 (12) ◽  
pp. eaax8647 ◽  
Author(s):  
X. Li ◽  
S. Nakagawa ◽  
Y. Tsuji ◽  
N. Watanabe ◽  
M. Shibayama
Keyword(s):  
Network Formation ◽  
General Scheme ◽  
Polymer Network ◽  
Three Dimensional ◽  
Geometric Constraints ◽  
Polymer Chains ◽  
Bond Percolation ◽  
Polymer Gel ◽  
Temporal Correlations ◽  
Before And After

Gels are a soft elastic material consisting of a three-dimensional polymer network with nanometer-sized pores and are used in a variety of applications. However, gel networks typically have a substantial level of defects because the network formation reaction proceeds stochastically. In this study, we present a general scheme to fabricate gels with extremely low levels of defects by applying geometric constraints into pregel solution based on the “bond percolation” concept. In the formed gel, stationary laser speckles, which are an indicator of spatial defects, were not observed at all. In addition, we found that the concentration fluctuations of the polymer chains were ergodic across the whole gel network. In such a homogeneous gel, both the spatial and temporal correlations of polymer chains are the same before and after gelation.

The kinetic peculiarities of interpenetrating polymer network formation

Polymer ◽  
1992 ◽  
Vol 33 (2) ◽  
pp. 361-364 ◽  
Author(s):  
Yu.S. Lipatov ◽  
G.M. Semenovitch ◽  
S.I. Skiba ◽  
L.V. Karabanova ◽  
L.M. Sergeeva
Keyword(s):  
Network Formation ◽  
Polymer Network ◽  
Interpenetrating Polymer Network
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