Trans ‐limonene dioxide, a promising bio‐based epoxy monomer

2021 ◽  
Vol 59 (4) ◽  
pp. 321-328
Author(s):  
Louis Schutz ◽  
Forouzan Kazemi ◽  
Elby Mackenzie ◽  
Jean‐Yves Bergeron ◽  
Eric Gagnon ◽  
...  
Keyword(s):  
Epoxy Monomer

scholarly journals The Curing Process of Epoxy/Amino-Functionalized MWCNTs: Calorimetry, Molecular Modelling, and Electron Microscopy

2010 ◽  
Vol 2010 ◽  
pp. 1-11 ◽  
Author(s):  
S. G. Prolongo ◽  
M. R. Gude ◽  
A. Ureña
Keyword(s):  
Molecular Simulation ◽  
Electron Microscopic ◽  
Reaction Heat ◽  
Simulation Tools ◽  
Curing Reaction ◽  
Morphological Studies ◽  
Epoxy Monomer ◽  
Curing Kinetic ◽  
Amine Groups ◽  
Functionalized Mwcnts

Curing kinetic of an epoxy resin reinforced with amino-functionalized MWCNTs has been studied by DSC and the obtained results were explained through morphological studies carried out by SEM, TEM, FEG-SEM, and molecular simulation tools. The presence of MWCNTs in the curing reaction induces a retardation effect of curing reaction and a decrease of the reaction heat. Both are associated with the adsorption of curing agent molecules inside carbon nanotubes, which was proved through the application of electron microscopic techniques and molecular simulation tools. It has been also demonstrated that there is a chemical reaction between amine groups anchored to the nanotubes and oxirane rings of epoxy monomer, which improves the nanoreinforcement/matrix interfacial adhesion, appearing a chemical interphase. The glass transition temperature (Tg) of epoxy matrix increases by the addition of MWCNTs due to the restriction of its mobility.

Epoxy monomer adsorption on Group III (B, Al, Ga) nitride nanotubes: vdW-DF studies on mechanical and electronic properties

2014 ◽  
Vol 67 ◽  
pp. 127-143 ◽  
Author(s):  
M.D. Ganji ◽  
N. Sharifi ◽  
A. Fereidoon ◽  
M. Ghorbanzadeh Ahangari
Keyword(s):  
Electronic Properties ◽  
Group Iii ◽  
Epoxy Monomer

scholarly journals Hyperbranched Poly(ether-siloxane)s Containing Ammonium Groups: Synthesis, Characterization and Catalytic Activity

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 856
Author(s):  
Paweł G. Parzuchowski ◽  
Aleksandra Świderska ◽  
Marlena Roguszewska ◽  
Karolina Rolińska ◽  
Dominik Wołosz ◽  
...  
Keyword(s):  
Methyl Iodide ◽  
Raw Materials ◽  
Ethylene Carbonate ◽  
Step Procedure ◽  
Hyperbranched Poly ◽  
Epoxy Monomer ◽  
Nmr Techniques ◽  
Anionic Ring ◽  
Amine Groups ◽  
Derivatives Of

In this article we report an easy synthetic route towards hyperbranched polyglycerols (Amm-HBPGs) containing trimethylammonium groups and siloxane or hydroxyl end-groups. Siloxane derivatives of Amm-HBPGs were synthesized in an efficient five-step procedure including an anionic ring opening copolymerization of the phthalimide-epoxy monomer with glycidol, followed by reactions with allyl bromide, hydrosililation with hydrogenheptamethyltrisiloxane, hydrazinolysis of phthalimide groups and quaternization of resulting amine groups with methyl iodide. Hydroxyl derivatives were obtained by quaternization of previously reported aminated HBPG’s with methyl iodide. Polymeric products were characterized using various NMR techniques, FTIR, and elemental analysis. Both Amm-HBPGs were shown to be effective in catalysis of addition of CO2 to oxirane. The hydrophilic catalysts showed higher efficiency but synthesis of ethylene carbonate was accompanied by formation of small amounts of ethylene glycol. The siloxane-containing catalyst was easily separable from reaction mixture showing high potential in the process of converting carbon dioxide into valuable chemical raw materials.

scholarly journals A Novel Synthesis of Poly(Ester-Alt-Selenide)s by Ring-Opening Copolymerization of γ-Selenobutyrolactone and Epoxy Monomer

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1203 ◽  
Author(s):  
Ya’nan Wang ◽  
Xiaofang Lin ◽  
Zhengbiao Zhang ◽  
Jian Zhu ◽  
Xiangqiang Pan ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ring Opening ◽  
Effective Means ◽  
Linear Structure ◽  
Size Exclusion ◽  
Ionization Time ◽  
Flight Mass Spectrometry ◽  
Epoxy Monomer ◽  
Polymerization System ◽  
Exclusion Chromatography

Ring-opening copolymerization (ROCOP) is an effective means to prepare functionalized polyester. In this work, a type of selenide-containing polyesters with controllable structure, molecular weight, and molecular weight distribution was successfully prepared by ROCOP of γ-selenobutyrolactone and epoxy compounds. The influence of the catalyst, solvent, and reaction temperature on the reaction efficiency was examined. Then, kinetic study was investigated under an optimized condition. The structure of the copolymers was carefully characterized by nuclear magnetic resonance (NMR), 1H NMR, 13C NMR, and 77Se NMR, Matrix-assisted laser-desorption-ionization time-of-flight mass spectrometry (MALDI-TOF-MS), and size exclusion chromatography (SEC). The resulting polymers showed a linear structure with a sequence regulated backbone repeating unit of ester-selenide. On this basis, some typical epoxides were investigated to verify the scope of the polymerization system. Due to the “living”/controlled characteristics of this ROCOP, multiblock, amphiphilic, and stereotactic copolymers could be prepared with a pre-designed structure. As expected, the selenide-containing amphiphilic copolymer could self-assemble to micelles and showed an oxidative response.

Synthesis and curing performance of a novel bio-based epoxy monomer from soybean oil

2017 ◽  
Vol 119 (8) ◽  
pp. 1600429 ◽  
Author(s):  
Yantao Li ◽  
Liting Yang ◽  
Hui Zhang ◽  
Zijian Tang
Keyword(s):  
Soybean Oil ◽  
Epoxy Monomer

Self-healing epoxy with a fast and stable extrinsic healing system based on BF3–amine complex

RSC Advances ◽  
2016 ◽  
Vol 6 (103) ◽  
pp. 100796-100803 ◽  
Author(s):  
Yi Xi Song ◽  
Xiao Ji Ye ◽  
Min Zhi Rong ◽  
Ming Qiu Zhang
Keyword(s):  
Self Healing ◽  
Cycloaliphatic Epoxy ◽  
Healing System ◽  
Epoxy Monomer ◽  
Amine Complex ◽  
Fast Healing

An easily processed healing system consisting of BF3–amine complex and cycloaliphatic epoxy monomer enables fast healing of cured epoxy within seconds.

scholarly journals Combined light- and heat-induced shape memory behavior of anthracene-based epoxy elastomers

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yuzhan Li ◽  
Monojoy Goswami ◽  
Yuehong Zhang ◽  
Tuan Liu ◽  
Jinwen Zhang ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Shape Memory ◽  
Uv Light ◽  
Dynamic Mechanical Properties ◽  
Stimuli Responsive ◽  
Epoxy Monomer ◽  
Dynamics Simulations ◽  
External Stimuli

AbstractThe development of multi-stimuli-responsive shape memory polymers has received increasing attention because of its scientific and technological significance. In this work, epoxy elastomers with reversible crosslinks are synthesized by polymerizing an anthracene-functionalized epoxy monomer, a diepoxy comonomer, and a dicarboxylic acid curing agent. The synthesized elastomers exhibit active responses to both light and heat enabled by the incorporated anthracene groups. When exposed to 365 nm UV light, additional crosslinking points are created by the photo-induced dimerization of pendant anthracene groups. The formation of the crosslinking points increases modulus and glass transition temperature of the elastomers, allowing for the fixation of a temporary shape at room temperature. The temporary shape remains stable until an external heat stimulus is applied to trigger the scission of the dimerized anthracene, which reduces the modulus and glass transition temperature and allows the elastomers to recover their original shapes. The effects of external stimuli on the thermal and dynamic mechanical properties of the elastomers are investigated experimentally and are correlated with molecular dynamics simulations that reveal the changes of structure and dynamics of the anthracene molecules and flexible chains.

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