scholarly journals Enhancing the Mechanical Properties of Matrix‐Free Poly(Methyl Acrylate)‐Grafted Montmorillonite Nanosheets by Introducing Star Polymers and Hydrogen Bonding Moieties

2021 ◽  
pp. 2100054
Author(s):  
Judith E. Rauschendorfer ◽  
Jytte Möckelmann ◽  
Philipp Vana
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Bonding ◽  
Methyl Acrylate ◽  
Star Polymers ◽  
Matrix Free

scholarly journals The crystal structures and mechanical properties of the uranyl carbonate minerals roubaultite, fontanite, sharpite, widenmannite, grimselite and čejkaite

2020 ◽  
Vol 7 (21) ◽  
pp. 4197-4221 ◽  
Author(s):  
Francisco Colmenero ◽  
Jakub Plášil ◽  
Jiří Sejkora
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Bonding ◽  
Diffraction Pattern ◽  
Crystal Structures ◽  
First Principles ◽  
X Ray Diffraction ◽  
Carbonate Minerals ◽  
X Ray ◽  
Uranyl Carbonate

The structure, hydrogen bonding, X-ray diffraction pattern and mechanical properties of six important uranyl carbonate minerals, roubaultite, fontanite, sharpite, widenmannite, grimselite and čejkaite, are determined using first principles methods.

The antioxidant methyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate

2014 ◽  
Vol 70 (11) ◽  
pp. 1050-1053 ◽  
Author(s):  
Xiang Li ◽  
Zhi-Gang Wang ◽  
Hou-He Chen ◽  
Sheng-Gao Liu
Keyword(s):  
Hydrogen Bonding ◽  
Dimethyl Sulfoxide ◽  
Methyl Acrylate ◽  
Title Compound ◽  
Intermolecular Hydrogen Bonding ◽  
Tert Butyl ◽  
Ester Carbonyl ◽  
Compound C ◽  
Steric Crowding

The title compound, C18H28O3, was prepared by the reaction of 2,6-di-tert-butylphenol with methyl acrylate under basic conditions using dimethyl sulfoxide as the promoter. The structure of this antioxidant indicates significant strain between theortho tert-butyl substituents and the phenolic OH group. In spite of the steric crowding of the OH group, it participates in intermolecular hydrogen bonding with the ester carbonyl O atom.

Novel Polyaspartic Ester Polyureas Based on Flexible Polyaspartic Ester

2011 ◽  
Vol 197-198 ◽  
pp. 1294-1298
Author(s):  
Ping Lu ◽  
Wei Bo Huang ◽  
Xue Qiang Ma ◽  
Xu Dong Liu
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Hydrogen Bonding ◽  
Molecular Weight Distribution ◽  
Michael Addition ◽  
Weight Distribution ◽  
Addition Reaction ◽  
Chain Extender ◽  
Michael Addition Reaction ◽  
Ft Ir

New polyaspartic ester (PAE) chain extender named PAE-f was prepared via two steps of Michael addition reactions:(1) Michael addition reaction between 4,4’-methylenebis(2-methyl cyclohexyl amine) (Laromin C260) and excessive dialkyl maleates（DEF）; (2) The Michael addition reaction of the residual dialkyl maleates of step (1) with polyester polyamine Jeffamine D230. The two-steps method proposed could reduce the reaction time in comparison with the current one step Michael addition reaction method, thus satisfying the industrialized production. New PAE based polyureas were synthesized by reacting the PAE-f chain extender with aliphatic polyisocyanates 4,4’-diisocyanato dicyclohexylmethane (H12MDI) / polyester polyamine Jeffamine D2000 prepolymer at room temperature. FT-IR and GPC were employed to characterize the new PAE prepared, and the morphology, molecular weight distribution and mechanical properties of the prepared PAE based polyureas were investigated by means of FT-IR and GPC. The FT-IR results indicated that the hydrogen bonding degree of amidogen groups in hard segments of the prepared polyureas were high, the length of hydrogen bonding were 0.305nm～0.306nm. The GPC experimental results show that the weight average molecular weight of the PAE-f based polyureas were 4.95×104～6.05×104,Mw/Mn were 1.65～1.97, the molecular weight distribution were relatively narrow. The mechanical properties demonstrated that the tensile strength were 14.7～22.5MPa, Elongation at break were 306～511%, Yang’s modulus were 67～127MPa, Shore A hardness were 64～83. The mechanical properties confirmed that the polyureas based on PAE-f were kinds of elastomeric materials with satisfied flexibility, strength, module and hardness.

Computational and Experimental Study of Phenolic Resins: Thermal–Mechanical Properties and the Role of Hydrogen Bonding

2015 ◽  
Vol 48 (20) ◽  
pp. 7670-7680 ◽  
Author(s):  
Joshua D. Monk ◽  
Eric W. Bucholz ◽  
Tane Boghozian ◽  
Shantanu Deshpande ◽  
Jay Schieber ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Hydrogen Bonding ◽  
Phenolic Resins ◽  
Thermal Mechanical Properties

Design for dynamic hydrogen bonding in a double network structure to improve the mechanical properties of sodium alginate fibers

2021 ◽  
Author(s):  
Ming Yan ◽  
Junfeng Shi ◽  
Song Tang ◽  
Guohang Zhou ◽  
Jiexiang Zeng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Bonding ◽  
Sodium Alginate ◽  
Network Structure ◽  
Wet Spinning ◽  
Double Network ◽  
Alginate Fibers

The SA/PAA-VSNP fiber was obtained using dynamic wet spinning through dynamic hydrogen bonding in the double network structure.

Intermolecular hydrogen bonding in developing nanostructured epoxy shape memory thermosets: Effects on morphology, thermo-mechanical properties and surface wetting

2020 ◽  
Vol 81 ◽  
pp. 106279 ◽  
Author(s):  
Jyotishkumar Parameswaranpillai ◽  
M.R. Sanjay ◽  
Suchart Siengchin ◽  
Sisanth Krishnan Sidhardhan ◽  
Seno Jose ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Bonding ◽  
Shape Memory ◽  
Intermolecular Hydrogen Bonding ◽  
Surface Wetting

scholarly journals Tuning the Mechanical Properties of Poly(Methyl Acrylate) via Surface‐Functionalized Montmorillonite Nanosheets

2020 ◽  
pp. 2000595
Author(s):  
Judith Elisabeth Rauschendorfer ◽  
Katharina Maria Thien ◽  
Manuela Denz ◽  
Sarah Köster ◽  
Florian Ehlers ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Methyl Acrylate
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