Cure behavior of epoxy-cyanate ester blend in composite systems: Evaluation studies in neat resin cast by thermal and FTIR techniques

2008 ◽  
Vol 109 (3) ◽  
pp. 2023-2028 ◽  
Author(s):  
K. Ravi Sekhar ◽  
Kishore ◽  
S. Sankaran
Keyword(s):  
Evaluation Studies ◽  
Cyanate Ester ◽  
Neat Resin ◽  
Cure Behavior ◽  
Composite Systems ◽  
Resin Cast

Effect of a Zirconium Tungstate Filler on the Cure Behavior of a Cyanate Ester Resin

2009 ◽  
Vol 1 (6) ◽  
pp. 1190-1195 ◽  
Author(s):  
K. Haman ◽  
P. Badrinarayanan ◽  
M. R. Kessler
Keyword(s):  
Cyanate Ester ◽  
Zirconium Tungstate ◽  
Cure Behavior ◽  
Cyanate Ester Resin

scholarly journals Blends of Cyanate Ester and Phthalonitrile–Polyhedral Oligomeric Silsesquioxane Copolymers: Cure Behavior and Properties

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 54 ◽  
Author(s):  
Xiaodan Li ◽  
Fei Zhou ◽  
Ting Zheng ◽  
Ziqiao Wang ◽  
Heng Zhou ◽  
...  
Keyword(s):  
Chemical Reactivity ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Far Infrared ◽  
Mechanical Analysis ◽  
Cyanate Ester ◽  
Scanning Calorimetry ◽  
Good Thermal Stability ◽  
Cure Behavior ◽  
Low Viscosity ◽  
Oligomeric Silsesquioxane

Blends of cyanate ester and phthalonitrile–polyhedral oligomeric silsesquioxane copolymers were prepared, and their cure behavior and properties were compared via differential scanning calorimetry (DSC) analysis, thermogravimetric (TG) analysis, dynamic mechanical analysis, Fourier-transform far-infrared (FTIR) spectroscopy, and rheometric studies. The copolymer blends showed high chemical reactivity, low viscosity, and good thermal stability (TG temperatures were above 400 °C). The glass-transition temperature of the blends increased by at least 140 °C compared to cyanate ester resin. The blends are suitable for preparing carbon-fiber-reinforced composite materials via a winding process and a prepreg lay-up process with a molding technique. The FTIR data showed that the polymerization products contained triazine-ring structures that were responsible for the superior thermal properties.

Light-cured dental composites characterization by Electron Microscopy

1990 ◽  
Vol 48 (4) ◽  
pp. 428-429
Author(s):  
B. M. Culbertson ◽  
M. L. Devinev ◽  
E. C. Kao
Keyword(s):  
Electron Microscopy ◽  
Mechanical Analysis ◽  
Service Performance ◽  
Dental Composite ◽  
Dental Composites ◽  
Neat Resin ◽  
Scanning Calorimetry ◽  
Research Meeting ◽  
Formulation Variables

The service performance of current dental composite materials, such as anterior and posterior restoratives and/or veneer cements, needs to be improved. As part of a comprehensive effort to find ways to improve such materials, we have launched a broad spectrum study of the physicochemical and mechanical properties of photopolymerizable or visible light cured (VLC) dental composites. The commercially available VLC materials being studied are shown in Table 1. A generic or neat resin VLC system is also being characterized by SEM and TEM, to more fully understand formulation variables and their effects on properties.At a recent dental research meeting, we reported on the differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) characterization of the materials in Table 1. It was shown by DSC and DMA that the materials are substantially undercured by commonly used VLC techniques. Post curing in an oral cavity or a dry environment at 37 to 50°C for 7 or more hours substantially enhances the cure of the materials.

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