scholarly journals Polybenzoxazines: Thermal Responsiveness of Hydrogen Bonds and Application as Latent Curing Agents for Thermosetting Resins

ACS Omega ◽  
2017 ◽  
Vol 2 (4) ◽  
pp. 1529-1534 ◽  
Author(s):  
Shuai Zhang ◽  
Po Yang ◽  
Yun Bai ◽  
Tao Zhou ◽  
Rongqi Zhu ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Thermosetting Resins ◽  
Curing Agents ◽  
Thermal Responsiveness

Leach-Proof Sol–Gel Microcapsules as Curing Agents for One-Pot Thermosetting Resins

2013 ◽  
Vol 1 (12) ◽  
pp. 1572-1579 ◽  
Author(s):  
Rosaria Ciriminna ◽  
Marzia Sciortino ◽  
Aster de Schrijver ◽  
Delphine Desplantier-Giscard ◽  
François Béland ◽  
...  
Keyword(s):  
Sol Gel ◽  
One Pot ◽  
Thermosetting Resins ◽  
Curing Agents

Imidazole derivatives as latent curing agents for epoxy thermosetting resins

2015 ◽  
Vol 161 ◽  
pp. 408-410 ◽  
Author(s):  
Koji Arimitsu ◽  
Sawako Fuse ◽  
Kenji Kudo ◽  
Masahiro Furutani
Keyword(s):  
Thermosetting Resins ◽  
Imidazole Derivatives ◽  
Curing Agents

Imidazole-type thermal latent curing agents with high miscibility for one-component epoxy thermosetting resins

2016 ◽  
Vol 54 (17) ◽  
pp. 2680-2688 ◽  
Author(s):  
Kenji Kudo ◽  
Sawako Fuse ◽  
Masahiro Furutani ◽  
Koji Arimitsu
Keyword(s):  
Thermosetting Resins ◽  
Curing Agents

Extraction and identification of fillers and pigments from pyrolyzed rubber and tire samples

1996 ◽  
Vol 54 ◽  
pp. 174-175
Author(s):  
P. Sadhukhan ◽  
J. B. Zimmerman
Keyword(s):  
Zinc Oxide ◽  
Electron Microscope ◽  
Carbon Black ◽  
Natural Rubber ◽  
Transmission Electron Microscope ◽  
Rolling Resistance ◽  
Synthetic Polymers ◽  
Nitrogen Atmosphere ◽  
Transmission Electron ◽  
Curing Agents

Rubber stocks, specially tires, are composed of natural rubber and synthetic polymers and also of several compounding ingredients, such as carbon black, silica, zinc oxide etc. These are generally mixed and vulcanized with additional curing agents, mainly organic in nature, to achieve certain “designing properties” including wear, traction, rolling resistance and handling of tires. Considerable importance is, therefore, attached both by the manufacturers and their competitors to be able to extract, identify and characterize various types of fillers and pigments. Several analytical procedures have been in use to extract, preferentially, these fillers and pigments and subsequently identify and characterize them under a transmission electron microscope.Rubber stocks and tire sections are subjected to heat under nitrogen atmosphere to 550°C for one hour and then cooled under nitrogen to remove polymers, leaving behind carbon black, silica and zinc oxide and 650°C to eliminate carbon blacks, leaving only silica and zinc oxide.

Use of molecular overlap to predict intermolecular repulsion in N... H-O hydrogen bonds

1998 ◽  
Vol 95 (3) ◽  
pp. 525-537 ◽  
Author(s):  
I. NOBELI S. L. PRICE R. J. WHEATLEY
Keyword(s):  
Hydrogen Bonds

On symmetrical O-H-O hydrogen bonds

1964 ◽  
Vol 25 (5) ◽  
pp. 487-492 ◽  
Author(s):  
R.E. Rundle
Keyword(s):  
Hydrogen Bonds

A Crystallographic Study of Bis[S-benzyl-5-bromo-2-oxoindolin-3-ylidenemethanehydrazonthioate] Disulfide Solvated with Dimethylsulfoxide

2012 ◽  
Vol 9 (2) ◽  
pp. 87
Author(s):  
Mohd Abdul Fatah Abdul Manan ◽  
M. Ibrahim M. Tahir ◽  
Karen A. Crouse ◽  
Fiona N.-F. How ◽  
David J. Watkin
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Solvent Molecule ◽  
Site Occupancy ◽  
Unit Cell Parameters ◽  
Intermolecular Hydrogen Bonds ◽  
Triclinic Space Group ◽  
Cell Parameters ◽  
Crystallographic Study ◽  
Thiol Form

The crystal structure of the title compound has been determined. The compound crystallized in the triclinic space group P -1, Z = 2, V = 1839 .42( 18) A3 and unit cell parameters a= 11. 0460( 6) A, b = 13 .3180(7) A, c=13. 7321 (8) A, a = 80.659(3 )0, b = 69 .800(3 )0 and g = 77 .007 (2)0 with one disordered dimethylsulfoxide solvent molecule with the sulfur and oxygen atoms are distributed over two sites; S101/S102 [site occupancy factors: 0.6035/0.3965] and 0130/0131 [site occupancy factor 0.3965/0.6035]. The C22-S2 l and C 19-S20 bond distances of 1. 779(7) A and 1. 788(8) A indicate that both of the molecules are connected by the disulfide bond [S20-S21 2.055(2) A] in its thiol form. The crystal structure reveals that both of the 5-bromoisatin moieties are trans with respect to the [S21-S20 and CI 9-Nl 8] and [S20-S21 and C22-N23] bonds whereas the benzyl group from the dithiocarbazate are in the cis configuration with respect to [S21-S20 and C19-S44] and [S20-S21 and C22-S36] bonds. The crystal structure is further stabilized by intermolecular hydrogen bonds of N9-H35···O16 formed between the two molecules and N28-H281 ···O130, N28-H281 ···O131 and C4 l-H4 l l ···O 131 with the solvent molecule.

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