scholarly journals Improvement of Mechanical and Self-Healing Properties for Polymethacrylate Derivatives Containing Maleimide Modified Graphene Oxide

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 603 ◽  
Author(s):  
Won-Ji Lee ◽  
Sang-Ho Cha
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Alder Reaction ◽  
Diels Alder ◽  
The Self ◽  
Self Healing ◽  
Diels Alder Reaction ◽  
Healing Efficiency ◽  
Modified Graphene Oxide ◽  
Modified Graphene

In this paper, a self-healable nanocomposite based on the Diels-Alder reaction is developed. A graphene-based nanofiller is introduced to improve the self-healing efficiency, as well as the mechanical properties of the nanocomposite. Graphene oxide (GO) is modified with maleimide functional groups, and the maleimide-modified GO (mGO) enhanced the compatibility of the polymer matrix and nanofiller. The tensile strength of the nanocomposite containing 0.030 wt% mGO is improved by 172%, compared to that of a polymer film incorporating both furan-functionalized polymer and bismaleimide without any nanofiller. Moreover, maleimide groups of the surface on mGO participate in the Diels-Alder reaction, which improves the self-healing efficiency. The mechanical and self-healing properties are significantly improved by using a small amount of mGO.

scholarly journals Bioinspired modified graphene oxide/polyurethane composites with rapid self-healing performance and excellent mechanical properties

RSC Advances ◽  
2021 ◽  
Vol 11 (24) ◽  
pp. 14665-14677
Author(s):  
Yahao Liu ◽  
Jian Zheng ◽  
Xiao Zhang ◽  
Yongqiang Du ◽  
Guibo Yu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Molecular Design ◽  
Self Healing ◽  
Modified Graphene Oxide ◽  
Rational Molecular Design ◽  
Mechanical Performances ◽  
Modified Graphene ◽  
Polyurethane Composites ◽  
Hyperbranched Polyamide

We successfully modified graphene oxide with amino-terminated hyperbranched polyamide(MGO), and obtained novel mussel-inspired MGO/polyurethane composites with outstanding self-healing and mechanical performances via rational molecular design.

scholarly journals The effect of electron density in furan pendant group on thermal-reversible Diels–Alder reaction based self-healing properties of polymethacrylate derivatives

RSC Advances ◽  
2018 ◽  
Vol 8 (69) ◽  
pp. 39432-39443 ◽  
Author(s):  
Keum-Seob Byun ◽  
Won Jae Choi ◽  
Ha-Young Lee ◽  
Min-Ji Sim ◽  
Sang-Ho Cha ◽  
...  
Keyword(s):  
Electron Density ◽  
Alder Reaction ◽  
Diels Alder ◽  
Pendant Group ◽  
Self Healing ◽  
Diels Alder Reaction ◽  
Healing Efficiency

Herein, we discuss the effect of electron density in a furan pendant group on the thermally reversible Diels–Alder (DA) reaction based self-healing efficiency in polymethacrylate derivatives.

Furan-based self-healing breathable elastomer coating on polylactide fabric

2018 ◽  
Vol 89 (5) ◽  
pp. 814-824 ◽  
Author(s):  
Yeon Sung Ryu ◽  
Kyung Wha Oh ◽  
Seong Hun Kim
Keyword(s):  
Water Repellency ◽  
Mechanical Analysis ◽  
Alder Reaction ◽  
Diels Alder ◽  
The Self ◽  
Vapor Permeability ◽  
Self Healing ◽  
Diels Alder Reaction ◽  
Poly Ethylene ◽  
Breathable Waterproof Fabric

The demand for breathable waterproof products has increased with the need for functional sportswear. However, these membranes have a major weakness in the loss of performance over time. The self-healing polymer has attracted much attention as a solution to this problem. In this research, a bio-based self-healing polymer from furan-based polymer was synthesized to produce a sustainable waterproof membrane. The furan-based self-healing polymer was synthesized from poly(butylene furanoate) and bismaleimide via a Diels–Alder reaction and blended with bio polyurethane. Poly(ethylene glycol) was also blended to obtain nonporous breathable waterproofness. These synthesis processes were identified by spectroscopy analysis. To investigate the self-healing ability of the polymer, a film sample was sliced and reattached. These self-healing processes were observed and verified by morphological and mechanical analysis. These self-healing polymer films were successfully healed in 24 h. The polymer was coated on a polylactide fabric using a doctor blade. The self-healing ability of the membrane was investigated by breathable water repellency analysis and it was maintained after the coating process. The waterproofness and vapor permeability were also measured, and these results identified that the fabricated membrane has a possibility as a breathable waterproof fabric. Environmental performance was confirmed by the enzymatic degradation test.

Self-Healing Hydrophobic POSS-functionalized Fluorinated Copolymer via RAFT Polymerization and dynamic Diels-Alder Reaction

2021 ◽  
Author(s):  
Siva Ponnupandian ◽  
Prantik Mondal ◽  
Thomas Becker ◽  
Richard Hoogenboom ◽  
Andrew B Lowe ◽  
...  
Keyword(s):  
Chain Transfer ◽  
Raft Polymerization ◽  
Alder Reaction ◽  
Diels Alder ◽  
Self Healing ◽  
Diels Alder Reaction ◽  
Reversible Addition

This investigation reports the preparation of a tailor-made copolymer of furfuryl methacrylate (FMA) and trifluoroethyl methacrylate (TFEMA) via reversible addition-fragmentation chain transfer (RAFT) polymerization. The furfuryl groups of the copolymer...

scholarly journals Rheometer Evidences for the Co-Curing Effect of a Bismaleimide in Conjunction with the Accelerated Sulfur on Natural Rubber/Chloroprene Rubber Blends

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1510
Author(s):  
Marek Pöschl ◽  
Shibulal Gopi Sathi ◽  
Radek Stoček ◽  
Ondřej Kratina
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Tensile Properties ◽  
Crosslinking Agent ◽  
Alder Reaction ◽  
Diels Alder ◽  
Ene Reactions ◽  
Rubber Blends ◽  
Diels Alder Reaction ◽  
Chloroprene Rubber

The rheometer curing curves of neat natural rubber (NR) and neat chloroprene rubber (CR) with maleide F (MF) exhibit considerable crosslinking torque at 180 °C. This indicates that MF can crosslink both these rubbers via Alder-ene reactions. Based on this knowledge, MF has been introduced as a co-crosslinking agent for a 50/50 blend of NR and CR in conjunction with accelerated sulfur. The delta (Δ) torque obtained from the curing curves of a blend with the addition of 1 phr MF was around 62% higher than those without MF. As the content of MF increased to 3 phr, the Δ torque was further raised to 236%. Moreover, the mechanical properties, particularly the tensile strength of the blend with the addition of 1 phr MF in conjunction with the accelerated sulfur, was around 201% higher than the blend without MF. The overall tensile properties of the blends cured with MF were almost retained even after ageing the samples at 70 °C for 72 h. This significant improvement in the curing torque and the tensile properties of the blends indicates that MF can co-crosslink between NR and CR via the Diels–Alder reaction.

scholarly journals Hyperbranched polyamide modified graphene oxide-reinforced polyurethane nanocomposites with enhanced mechanical properties

RSC Advances ◽  
2021 ◽  
Vol 11 (24) ◽  
pp. 14484-14494
Author(s):  
Yahao Liu ◽  
Jian Zheng ◽  
Xiao Zhang ◽  
Yongqiang Du ◽  
Guibo Yu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
High Performance ◽  
Cross Linking ◽  
Elongation At Break ◽  
Modified Graphene Oxide ◽  
High Performance Composite ◽  
Modified Graphene ◽  
Polyurethane Nanocomposites ◽  
Hyperbranched Polyamide

We successfully modified graphene oxide with amino-terminated hyperbranched polyamide (HGO), and obtained a high-performance composite with enhanced strength and elongation at break via cross-linking hydroxyl-terminated polybutadiene chains with HGO.

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