Diels–Alder “click” chemistry for the cross-linking of furfuryl-gelatin-polyetheramine hydrogels

RSC Advances ◽  
2014 ◽  
Vol 4 (67) ◽  
pp. 35578 ◽  
Author(s):  
C. García-Astrain ◽  
A. Gandini ◽  
C. Peña ◽  
I. Algar ◽  
A. Eceiza ◽  
...  
Keyword(s):  
Click Chemistry ◽  
Diels Alder ◽  
Cross Linking ◽  
The Cross

An Eco-Friendly Scheme for the Cross-Linked Polybutadiene Elastomer via Thiol–Ene and Diels–Alder Click Chemistry

2015 ◽  
Vol 48 (11) ◽  
pp. 3539-3546 ◽  
Author(s):  
Jing Bai ◽  
Hui Li ◽  
Zixing Shi ◽  
Jie Yin
Keyword(s):  
Click Chemistry ◽  
Diels Alder ◽  
The Cross

scholarly journals New insights into the cross-linking and degradation mechanism of Diels–Alder hydrogels

2015 ◽  
Vol 3 (3) ◽  
pp. 449-457 ◽  
Author(s):  
Susanne Kirchhof ◽  
Andrea Strasser ◽  
Hans-Joachim Wittmann ◽  
Viktoria Messmann ◽  
Nadine Hammer ◽  
...  
Keyword(s):  
Ring Opening ◽  
Degradation Mechanism ◽  
Alder Reaction ◽  
Diels Alder ◽  
Cross Linking ◽  
Diels Alder Reaction ◽  
Maleamic Acid ◽  
The Cross ◽  
Hydrolysis Of

Degradation of Diels–Alder hydrogels occurs by retro-Diels–Alder reaction followed by OH−-catalyzed ring-opening hydrolysis of maleimide groups to unreactive maleamic acid derivatives.

Thermoreversible cross-linking of ethylene/propylene copolymers based on Diels–Alder chemistry: the cross-linking reaction kinetics

2020 ◽  
Vol 11 (36) ◽  
pp. 5851-5860
Author(s):  
Shuhui Liu ◽  
Xiaoyan Liu ◽  
Zongke He ◽  
Liying Liu ◽  
Hui Niu
Keyword(s):  
Reaction Kinetics ◽  
Diels Alder ◽  
Cross Linking ◽  
Ethylene Propylene ◽  
Rheological Method ◽  
The Cross ◽  
Kinetics Of

The kinetics of the cross-linking reaction of ethylene/propylene rubbers based on Diels–Alder chemistry was detected by the rheological method.

scholarly journals Bio-Based Thermo-Reversible Aliphatic Polycarbonate Network

Molecules ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 74 ◽  
Author(s):  
Pierre-Luc Durand ◽  
Etienne Grau ◽  
Henri Cramail
Keyword(s):  
Thermal Stability ◽  
Biomedical Applications ◽  
Diels Alder ◽  
Cross Linking ◽  
Important Class ◽  
Aliphatic Polycarbonate ◽  
Biomedical Field ◽  
The Cross ◽  
Thermal Stability Of

Aliphatic polycarbonates represent an important class of materials with notable applications in the biomedical field. In this work, low Tg furan-functionalized bio-based aliphatic polycarbonates were cross-linked thanks to the Diels–Alder (DA) reaction with a bis-maleimide as the cross-linking agent. The thermo-reversible DA reaction allowed for the preparation of reversible cross-linked polycarbonate materials with tuneable properties as a function of the pendent furan content that was grafted on the polycarbonate backbone. The possibility to decrosslink the network around 70 °C could be an advantage for biomedical applications, despite the rather poor thermal stability of the furan-functionalized cross-linked polycarbonates.

scholarly journals Investigation of the functional network modifier loading on the stoichiometric ratio of epoxy resins and their dielectric properties

2021 ◽  
Author(s):  
Istebreq A. Saeedi ◽  
Sunny Chaudhary ◽  
Thomas Andritsch ◽  
Alun S. Vaughan
Keyword(s):  
Glass Transition ◽  
Dielectric Properties ◽  
Electrical Properties ◽  
Epoxy Resins ◽  
Functional Network ◽  
Cross Linking ◽  
Network Modifier ◽  
Epoxy Resin System ◽  
The Cross ◽  
The Impact

AbstractReactive molecular additives have often been employed to tailor the mechanical properties of epoxy resins. In addition, several studies have reported improved electrical properties in such systems, where the network architecture and included function groups have been modified through the use of so-called functional network modifier (FNM) molecules. The study reported here set out to investigate the effect of a glycidyl polyhedral oligomeric silsesquioxane (GPOSS) FNM on the cross-linking reactions, glass transition, breakdown strength and dielectric properties of an amine-cured epoxy resin system. Since many previous studies have considered POSS to act as an inorganic filler, a key aim was to consider the impact of GPOSS addition on the stoichiometry of curing. Fourier transform infrared spectroscopy revealed significant changes in the cross-linking reactions that occur if appropriate stoichiometric compensation is not made for the additional epoxide groups present on the GPOSS. These changes, in concert with the direct effect of the GPOSS itself, influence the glass transition temperature, dielectric breakdown behaviour and dielectric response of the system. Specifically, the work shows that the inclusion of GPOSS can result in beneficial changes in electrical properties, but that these gains are easily lost if consequential changes in the matrix polymer are not appropriately counteracted. Nevertheless, if the system is appropriately optimized, materials with pronounced improvements in technologically important characteristics can be designed.

scholarly journals The Effect of Surfactant-Modified Montmorillonite on the Cross-Linking Efficiency of Polysiloxanes

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2623
Author(s):  
Monika Wójcik-Bania ◽  
Jakub Matusik
Keyword(s):  
Total Pore Volume ◽  
Cross Linking ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
The Cross ◽  
Chain Lengths ◽  
First Time ◽  
Substituent Influence ◽  
Benzyl Substituent

Polymer–clay mineral composites are an important class of materials with various applications in the industry. Despite interesting properties of polysiloxanes, such matrices were rarely used in combination with clay minerals. Thus, for the first time, a systematic study was designed to investigate the cross-linking efficiency of polysiloxane networks in the presence of 2 wt % of organo-montmorillonite. Montmorillonite (Mt) was intercalated with six quaternary ammonium salts of the cation structure [(CH3)2R’NR]+, where R = C12, C14, C16, and R’ = methyl or benzyl substituent. The intercalation efficiency was examined by X-ray diffraction, CHN elemental analysis, and Fourier transform infrared (FTIR) spectroscopy. Textural studies have shown that the application of freezing in liquid nitrogen and freeze-drying after the intercalation increases the specific surface area and the total pore volume of organo-Mt. The polymer matrix was a poly(methylhydrosiloxane) cross-linked with two linear vinylsiloxanes of different siloxane chain lengths between end functional groups. X-ray diffraction and transmission electron microscopy studies have shown that the increase in d-spacing of organo-Mt and the benzyl substituent influence the degree of nanofillers’ exfoliation in the nanocomposites. The increase in the degree of organo-Mt exfoliation reduces the efficiency of hydrosilylation reaction monitored by FTIR. This was due to physical hindrance induced by exfoliated Mt particles.

Shining Light on Cyclopentadienone–Norbornadiene Diels–Alder Adducts to Enable Photoinduced Click Chemistry with Cyclopentadiene

2021 ◽  
Author(s):  
Sophia J. Bailey ◽  
Friedrich Stricker ◽  
Erik Hopkins ◽  
Maxwell Z. Wilson ◽  
Javier Read de Alaniz
Keyword(s):  
Click Chemistry ◽  
Diels Alder
Sign in / Sign up

Export Citation Format

Share Document